ORGANIC REMAINS. 



337 



Murex ilriatui. F. 116. Ventricose ; aperture wide ; epire 

 ehort, consisting of five volutions ; the whole shell covered by 

 numerous, sharp, wide set ribs, the intermediate hollows being 

 striate, and intersected by longitudinal striae; beak nearly 

 straight. Found in the crag pits of Essex and Suffolk. 



Murex ccntrarius. F. 47. Shell strong 1 , reversed ; spire 

 with five volutions, separated by an undulating suture ; aper- 

 ture ovate -oblong; body and spire, with numerous distant, 

 smooth transverse ribs ; beak short. 



Ranella Itevigata. Ovate, ventricose, smooth, beak kwMM 

 short; lip creuulated within. Found at Piedmont. 



Fusus longtevut. F. 52. Body veutricose, surmounted by a 

 row of large knobs; spire turreted, the volutions flattened at 

 top, and slightly nodulated nt their edges; aperture ovate; 

 beak as long as the spire, slightly bent near the base. This is 

 a large shell, measuring- sometimes 8J inches. Found at Bar- 

 ton and Hordwell cliffs, Hampshire. 



Fusus crispus. F. 102. With strong longitudinal ribs cover- 

 ing the body and spire ; and transverse small thickly set ones ; 

 and with transverse intermediate strite ; spire with seven volu- 

 tions ; beak long, tapering, straight, and striated. 



Fatciolaria turbinelloides. F. 9U. Spire as long as the body, 

 consisting of eight turreted volutions, separated by a strong 

 suture, with large, slightly raised knobs a row of which also 

 surmounts the body; the whole shell covered with double, 

 distinct striae, somewhat undulating, and a few remote, waved 

 longitudinal striae. 



Pleurotoma clavicular is. F. 84. Spire a third the length of 

 "Jie shell, consisting of nine smooth, slightly divided volutions, 



jach with four strong spiral striae at top, aa well as on the 



lumella, 

 numerous strong transverse striae. 



jody pillar; lip with a reflected colu 



above which are 



Pleurotoma denticula. F. 107. Spire very long, consisting 

 of eight t nrreted volutions, each with a nodulous baud at upper 

 edge; body very small, and beak short; the whole shell covered 

 with strong spiral strhe. 



Pleurotoma tuberculosa. F. 86. Turreted, body very small, 

 epire very large, consisting of ten volutions strongly tubercu- 

 lated at top, and longitudinally wrinkled ; the body surmounted 

 by i band of four rows of tubercles, and a smooth band at its 

 base ; beak thick, very short, and longitudinally undulated. 



I'feurotoma rotata. F. 92. Turreted, spire very large, of 

 seven volutions, a greatly produced carination in the centre, 

 with a row of large tubercles, which also surmounts the body, 

 which is small ; the whole shell covered with numerous spiral 

 striae, and three thread-like lines run spirally from the centre 

 of the body to the apex ; beak of moderate length. 



Pleurotoma Vulpeculti. F. 103. Turreted, spiral same 

 length of body ; longitudinally ribbed, and transversely striate ; 

 canal short, straight. 



NERiN.iiA. Turreted, elongated; canaliculated at the base ; 

 aperture narrow, oblique, and sub-quadrangular; columella 

 large, perforated the whole length of the shell ; thick and 

 strong, with irregular projecting folds extend from the base to 

 the apex over all the volutions ; one aud sometimes two plaits 

 upon the right side, which correspond to the intervals of the 

 plaits of the columella. 



Nerincea Mosce. F. 118. Turreted, conical, irregularly sub- 

 plaited ; volutions subuodulous at their base, in the middle of 

 the columella; columella three-plaited; right lip with two 

 plaits. 



Cerithium geminatum. F. 58. Conical, elongated, with 

 twelve smooth volutions, each surrounded by seven or eight 

 longitudinally disposed pairs of acute tubercles, and two obso- 

 lete transverse carinae; lip even. Found at Barton Cliff. 



POTOMIDES. Shell univalve turreted; aperture almost semi- 

 circular, but destitute of a canal in the upper angle; base 

 contracted into a short, slightly truncated beak ; outer lip 

 dilated, with a corneous operculum. 



Potomides concavus. F. 38. Subulately conical, slightly 

 striated transversely; volutions somewhat concave towards 

 their upper sides, and provided with obscure, arched ribs, 

 slightly raised abovo the middle, and extending nearly to the 

 centre of the volutions; base convex, provided with one or 

 two granulated carinae ; outer lip slightly grooved in its upper 

 angle ; columella smooth ; aperture nearly circular. Found at 

 Barton Cliff and Headon hill, Isle of Wight. 



Turritella imbricatoria. F. 88. Turreted with sixteen, flat, 

 transversely sulcated volutions, well defined by the suture; at 

 the base of each volution there is a smooth, spiral belt; base of 

 body smooth; aperture nearly circular, columella slightly re- 

 flected. 



Turritella cotioirfea. F. 50. Base of each volution angular, 

 and slightly projecting, with equidistant spiral striae, seven or 

 more with intermediate smaller ones, acutely crenulated. 



Turritella proto. F. 90. With sixteen nearly flat volution?, 

 each furnished with six smooth spiral ribs, the interstices 

 smooth; base of body smooth, columella but slightly reflected 

 above, thicker beneath, with a slight subumbilicus ; aperture 

 somewhat ovate. 



I'hasianell't angulosa. F. 65. Conical, smooth, with the 

 volutions subcarinated towards their base; aperture nearly 

 circular. Found at Shalcombe. 



Turbo muricatus. F. 67. Short, conical, with numerous 

 m unrated ridges, which are equal to the concave spaces; outer 

 lip plaited ; columella indented at the base. Found in the coral 

 rag at Steeple Ashton. 



RISSOA. Shell conical; spire shorter than the body; aper- 

 ture subovate ; inner lip reflected on the columella ; outer lip 

 thickened. 



Risioa lirvis. F. 42 and 43. Smooth, subcylindriral, with 

 six slightly divided volutions; apex obtuse; aperture serai- 

 ovate. 



PYRAMIS. Subturreted and subconical; aperture entire, and 

 usually distinct from the body. 



Pyramis turgidui. F. 77. Turreted, with five much inflated 

 volutions, separated by , deep suture, with strong longitudinal 

 flat ribs, and very fine regular transverse striae ; apex acute. 

 Found at St Hospice, near Nice, Italy. 



Trochtu BenetticB. F. 55. Depressed, conical; obliquely 

 wrinkled; base expanded, with a broad-waved margin ; volu- 

 tions externally irregular; base provided with a plicated partly 

 covered umbilicus; aperture compressed. 



Trochus magus. F. 97. Conoidal, thick, transversely and 

 longitudinally striated; upper margin of the volutions crowned 

 with tubercles ; convex beneath, with strong circular striae ; 

 base deeply umbilicated. 



Solarium canaliculatum. F. 82. Convexly orbicular; above 

 it is furnished with waved transversely granulated figures; 

 umbilicus crenulated, and slightly canaliculated. 



Solarium variegatum. F. 105. Orbicularly convex ; trans- 

 versely sulcated, and longitudinally striated ; with a patulous, 

 crenulated umbilicus. 



EUOMPIIILUS. Shell involute compressed; spire depressed 

 on the upper part ; concave, or largely umbilicated beneath ; 

 aperture nearly angular. 



Euomphilus pentangulatus . F. 33. With six volutions, a 

 prominent central ridge on the upper side, and the under side 

 obtusely angulated ; striae irregular and oblique; volutions 

 almost wholly exposed; aperture pentangular. From the 

 black limestone, near Dublin. 



Scalaria timilis. F. 119. Volutions contiguous; spire with 

 eight volutions, each with distant, elevated, longitudinal oblique 

 ribs, and strong spiral striae ; aperture nearly round. Found 

 at Brarnerton, near Norwich. 



CIBBUS. Spiral, conical, and destitute of a columella ; fun- 

 nel-shaped beneath ; volutions united. 



Cirrus acutus. F. 36 Conical, sharp, each volution fur- 

 nished with an obscure carina near its upper part; aperture 

 round. Fojund in Derbyshire. 



Tornatella fasciata. F. 95. Covered with fine transverse or 

 spiral striae ; apex acute ; aperture compressed ; columella with 

 one plait. 



ACTEON Shell elongated, and somewhat lengthened ; aper- 

 ture entire, oblong, generally about two-thirds the length of 

 the shell; acutely angular above, and rounded underneath; 

 outer lip sharp-edged ; columella provided with a spiral, strong 

 plait at its base ; operculum oblong and corneous. 



Acteon A r o<e. F. 39. Shell very thin, oval, with transverse, 

 equidistant, and somewhat wide striae ; and obsoletely decus- 

 sated; the columella with one plait; outer lip slightly sulcated 

 interiorly. Found in the crag at Walton, Essex. 



Katica depresta. Nearly globular, and gubumbilicated at 

 the base, with six volutions flattened above; columella depress. 

 ed beneath ; mouth angular at the upper parts. Found at 

 Woodbridsre. Suffolk. 



Natica epiglottina. F. 100. Semi-globose ; smooth ; spire 

 very short; month large, expanding; umbilicus compressed; 

 semicylindrical, and half hid by the thickness on the pillar lip ; 

 above epiglottiforra. Found at Montmartre. 



PLEUROTOMARIA. Shell turbinated, trochifonn, and discoidal; 

 aperture entire, oblique, rounded, or angular, with a larger or 

 smaller cleft, but deep on the edge of the outer lip. 



Pleurotomaria ornata. F. 120. Shell orbicular, discoidal ; 

 both sides somewhat convex, base perforated ; with longitu- 

 dinal, regular, slightly undulated striae ; umbilicus narrow, 

 with a spiral rounded rib from the centre of the outer lip to the 

 apex. Found at Caen and Bayeux. 



' Nerita tricarinata. F. 83. With three strong keel-like 

 transverse ribs on the body, and deeply striate spirally; outer 

 lip with strong undulations. 



Ampullaria acuta. F. 70. Ventricose, longer than wide, 

 smooth; spire small, acute; umbilicus small, half closed, some- 

 times entirely so ; aperture ovate, elongated, twice as long as 

 wide. Found at Christchurch. 



Paludina concinnata. F. 44. Somewhat conical, with five 

 slightly convex volutions ; lower part a little angular ; surface 

 smooth. Found at Barton Cliff. 



Melania striata. F. 49. Body and spire about equal, taper- 

 ing, with from eight to ten volutions, spirally ribbed through- 

 out : volutions well divided by the suture. A large shell, 

 sometimes exceeding eight inches. Found in the coral-rag 

 stratum, Wiltshire. 



Lymneea minima. F. 63. Elongated, with somewhat con- 

 vex smooth volutions ; aperture ovate, not half the length of 

 the shell; body uot ventricose. Found in limestone, Isle of 

 Wight. 



Planorbit cylindrinu. F. 61. Cylindrical, with three or four 

 adpressed volutions concentrically striated on the left side ; 

 aperture transverse, oblong, quadrangular. 



Auricula turgida. F. 62. Ovate, acute, turgid, shining, 

 and transversely striated; aperture oblong; lips thick; colu- 

 mella with two plaits; outer Up smooth, and thickened in the 

 middle. Found in the blue clay at Highgate. 



Helicina expansa. F. 68. Spire conical, somewhat depress- 

 ed ; volutions cariuated ; obscurely striated ; ventricose be- 

 neath ; callus expanded ; aperture quadrangular. 



Heh x glooonu. F. 64. Subconic, inflated, covered with ob- 

 scure transverse striae ; outer lip reflected ; body very large ; 

 spire a third the length of the body ; umbilicus concealed by the 

 coatinu' on the inner lip. Found at Shalcombe, Isle of Wight. 



L'ulnptraa orbiculata. F. 79. Orbicular, smooth, depressed, 

 and slightly striate spirally. 



I'-i/yptrii'a trochiformi*. F. 89. rrocniform, volutions some- 

 what rounded, and covered with long spines. 



. Obconical, hollow beneath, spirally con vo 



