33G 



ORGANIC REMAINS. 



Gyrogima cottata.Y\. CG. f. 6. Upper side with concentric, 

 divergent ribs, and an umbUtoaUd centre 



OiilNQUEi-oct'LiNA. With live cells surrounding the axis, and 

 alternately embracing each other; aperture extremely -mall, 

 orbicular, nnd situnte at the base of the larger compartment. 



Quinyueioculiiiit striatula. PI. <X. {. 110. With five com- 

 partment*, the two longer ones somewhat embracing the 

 others; all longitudinally striate. Found in the Calcaire 

 Grossier, at Paris. It is nut larger than the head of a small 

 pin. 



TRILOCULINA. With three cells surrounding the axis, alter- 

 nately clasping each other; aperture seinilunar, or sub-dis- 

 cuidul. 



Triloculina communit. PI. 66. f. 19. Three-lobed, the su- 

 perior one striate at top ; fhell smooth and glossy. Found in 

 the Calcaire Grossier at Puris. Very minute. 



BiLnciiLiNA. Two-chambered, the inferior one losing itself; 

 the superior aperture circular, with a bifurcate, projecting 

 c) jilion in its centre. 



Biloculina opposita. PI. 66. f. 114. Shell with two opposed 

 compartments ; the superior one embracing the smaller. Found 

 in the Calcaire Grossier at Paris. Very minute. 



FAMILY V. CRISTACKA. 



Shell discoidal, with an eccentric spire. 



ORBICULINA. Subdiscoid, roultilocular, with compound con- 

 tiguous volutions; bpire eccentric; cells short, very numerous; 

 septa imperforate-. 



Orbicutina uncinata. PI. 65. f. 19. Spirally striated, and 

 the volutions separated by a deep sinus. 



CRISTFLLARIA Semidiscoidal, multilocular ; cells contigu- 

 ous, simple, progressive'y enlarging; spire eccentric, subla- 

 teral ; septa imperforate. 



Crutellaria Sguammula. F. 20. Shell externally covered 

 with minute scale-like lines. 



RENULINA. Kidney-shaped, flat, siilcated, and multilocular; 

 volutions linear, contiguous, the second curved, the last length- 

 ened ; the axis marginal. 



Renulina operculiiria. F. 21. Semilunar, depressed, with 

 arcuated concentric ridges. Found at Griguou. 



FAMILY VI. LITUOLACEA. 



Shell partly spiral ; the last volution continued in a straight 

 line. 



LITUOLA. Disciform, partly spiral and multilocular; volu- 

 tions contiguous, the last terminating in a straight line ; cells 

 irregular ; septa transverse and simple, the last perforated by 

 three or six holes. 



Lituola diformis. F. 22. Curved, semispiral, extremities 

 obtuse ; the base close. Found at MVudon. 



SPIROLINA. Multilocular, partly spiral, and discoid; volu- 

 tions contiguous, the last one terminating in a straight line ; 

 septa straight, perforated by a tube. 



tipirolina cylindrica. F. 23. Shell straight, apex partly 

 incurved; aperture orbicular. Found at Grignon. 



FAMILY VII. ORTHOCERATA. 



Shell straight, or nearly so, and not spiral. 



CONILITES. Conical, straight, slightly inflected, having a 

 thin outer crust distinct from the nucleus which it contains ; 

 nucleus somewhat separable, multilocular, and divided by 

 transverse septa. 



Conilites pyramidata. F. 24. Pyramidal, with the concave 

 bands contracted. Found at Vanches Noires. 



HIPPU RITES. Cylindrico-conical, straighr, or a little arcuate, 

 multilocular, with transverse septa; an internal lateral channel 

 formed by two parallel, longitudinal, obtuse, and convergent 

 ridges, the last cell closed by an operculum. 



Hippurites infundibiliformii. F. 25. Funnel -shaped, four- 

 chambered j lid with two wedge-shaped slits. Found at 

 Grignon. 



ORTIIOCERA. Elongated, straight, or a little arcuated, and 

 subconic; ribbed, with longitudinal, external grooves; cham- 

 bers formed by transverse septa, perforated by a tube, which is 

 either central or marginal. 



Orthocera annulita. F. 29. Slightly tapering, and some- 

 what compressed, with strong, somewhat oblique, aiiniiltitinii.*, 

 at a distance of about one-fourth the diameter from each other ; 

 siphuncle placed near the margin. Found in a limestone quarry 

 at Colesbrookdale, Shropshire. 



BELEMNITES. Straight, conical, elongated, capable of being 

 separated into two parts, the outer one being a solid sheath, 

 produced above, and excavated with a conical cell beneath; 

 the inner nucleus conical, and multilocular, divided by numer- 

 ous transverse septa, perforated by a central tube. 



Jielemnitet abbreviates. F. 2G. Tapering, sheath smooth 

 externally, and striated internally. 



AMPLEXUS. Almost cylindrical, divided Into chambers by 

 numerous transverse septa; septa embracing each other with 

 their reflected margins. 



Amplexui coraUoidet. F. 34. Tube irregularly curved, and 

 striate longitudinally ; margins of the septa regularly plaited 

 and deeply reflexed. Diameter an inch and a half. Found on 

 the Black rock at Limerick, Ireland. 



CON ULARIA. Conical, hollow, and divided bv numerous 

 imperforate septa. 



Calearhni rariipii.n. V. 100. Doubly eonicnl ; top with a 

 central bottom, Irani which radiate six lines divuiinir it into 

 compartments, four of which are provided with central, mar- 

 ginal spines; aperture consisting of a slit in one n( the lines. 

 Extremely minute. Found in the Paris basin. 



Clavulina corrugtilu. F. 1 1'2. Shell erect, tapering; pro- 

 vided with numerous compartments, transversely divided; thp 

 aperture circular, and placed in the superior one ; inferior 

 compartments complicated, separated into lozenge-shaped di- 

 visions. Found in the Paris basin. 



ORDER III TRACHELIPODA. 



SECTION I. ZOOPHAGOUS TRACHELIPODA. 

 FAMILY I. INVOLUTE. 



Contit duo'ius. F. 73. Shell smooth, spire about a third of 

 the length of the shell, and with a slight indication of tubercles. 

 Found in clay at Highgate hill, London. 



Oliva Salisburnitma. F. 72. Subfusiform, short, ventrieose, 

 smooth; mouth oblong, both lips tumid above. Found ir, 

 Hampshire. 



AnciUaria aveniformit. F. 66. Elongated, oblong-ovate, 

 smooth and shininer, spire long, acute ; columella with two plaits ; 

 inner lip extension short ; aperture somewhat more than half 

 the length of the shell ; inner lip extended over about a third 

 of the exposed part of each volution. Found at Barton. 



Terebe/lum fusiforme. F. 71. Cylindrical, subfusiform, 

 spire visible and obtuse; aperture with an adpres-ed st.raight 

 canal, proceeding from its upper angle to the apex of the spire. 

 Found near Hordwell. 



SERAPHS. Convoluted, elongated; spire internal, concealed; 

 base truncated; aperture longitudinal, extending to the apex 

 of the spire; lip acute; columella smooth. Distinguished 

 from the terebellum, by the volutions of the spire being con- 

 cealed. 



Seraphs convolvuhu. F. 37. Subcylindrical, slightly tapering 

 towards the base, which is truncated ; apex obtuse ; external 

 surface smooth ; shell thin and fragil. Found in Hampshire. 



Ct/preea oviformis. F. 45. Oviform, tumid, smooth, nnd 

 slightly margmated ; aperture somewhat expanding towards 

 its base, and obscurely toothed on its left side; right lip tumid 

 and involute, and tapering to a short semibeak. Found at 

 Highgate hill. 



Marginellu guadrupUcata. F. 75. Very minute; oval, 

 smooth, columella with four plaits, aperture linear, outer lip 

 toothed and thickened. Found at St Hospice, Italy. 



Valuta spinosa. F. 57. Turbinated, base transversely striate; 

 body with longitudinal separated ribs; body wholly crowned 

 with somewhat acute spines; spire short, acute, and spiuous; 

 columella from four to six plaited. Found at Grignon. 



t'oluta rarispina. F. 87. Obovate, base transversely sul- 

 cated ; the body volution with remote, somewhat obtuse 

 spines ; spire short and mucronated; outer lip thick, internally 

 striated ; culumella callous, with three depressed plaits. 



Mitra plicatula. F. S3. Longitudinally ribbed; outer lip 

 about half the length of the shell ; columella with five plaits. 



Mitra Dufresnei. F. 101. Spire short; body longitudinally 

 snbstriate ; with remote, transverse, strong striae ; pillar lip 

 reflected on the columella, which is three plicated. 



Columbella punctata. F. 76. Ovate with strong longitudi- 

 nal and transverse striae, which gives the shell the appearance 

 of being deeply punctured; colnmella two plaited; outer lip 

 slightly denticulated, and the aperture somewhat compressed. 

 Found at St Hospice, Italy. 



F.burna glabrata. F. 80. 



Buccinum reticosum. F. 56. Oblong-ovate, acute, reticu- 

 lated ; with six volutions, the upper and lower parts rounded, 

 and the sides somewhat flattened; outer lip denticulated within; 

 the transverse striae are in pairs ; the aperture ovate, pointed 

 above, and the lower end furnished with a recurved sinus. 

 Found at Holy well. 



Ruccinum prismaticum. F. 104. With close, somewhat 

 oblique longitudinal ribs, nnd transversely waved; striate; 

 volutions considerably inflated, and deeply divided by the su- 

 ture. 



Euccinum semistriatum. F. 94. Spirally striate; shell con- 

 sisting of six slightly divided volutions occupying half the shell. 



Cassis bicatiitatus. F. 61. Ovate, ventricose, with numerous 

 transverse ribs, decussated by indistinct longitudinal costae, 

 towards the upper part of each volution, giving a clminlike 

 appearance ; aperture ovate ; inner lip much reflected on the 

 body, through which the ribs are visible; outer lip slightly 

 tuberculated. Found in the crag at Bawdsey, Suffolk. 



Canidaria carinata. K. 85. Ovate, with transverse, thin, 

 slightly undulating striae; girdled with five subcariiiated waved 

 ribs, tuberculated on their upper edge ; volutions of the spire 

 flattened above ; beak long, and slightly turned upwards. 

 Found at Grignon. 



Cassidaria echinoptera. F. 96. Ovate-globose, ventrieose, 

 with four broad, elevated, tuberculated, bands, occupying the 

 upper portion of the shell ; volutions of the spire angulated, 

 with sharp tubercles on their upper edges. 



Strombui Icevis. F. 81. Shell smooth, shining; spire short, 

 consisting of four volutions. 



RosteOaria rimosa. F. 54. Fusiform, volutions slightly 

 convex, longitudinally ribbed, and transversely striate; lip 

 reflected, with a sinus at the inferior edge, below the expansion 

 of the margin ; with a canal at the superior edge, extending 

 nearly the whole length of the spire ; beak straight. Found 

 in clay at Barton Cliff. 



