PVRULA. 



Genus XXII. 



MOLLUSCA. 



59 



-PYRU LA.— Lamarck. 



5. P. Smithii — Smith's Pyrula, pi. XXXIV. fig. 26, 27. 

 Murex Smithii. Sowerby, Min. Conch. \'I. p. 151, pi. 578 

 fig. 1,2. 



Pyriform ; body large in proportion to the spire, which con- 



Shell thill, oblong, ventricose above, somewhat at- 

 tenuated below, and usually very regular in form; spire 



short and rounded; aperture elongated, lengthened into a sists of four depressed volutions, hardly a sixth the lon<Tth of 



short, broad canal at the base, narrower in its superior the body; on the body are three rows of oblong, short, bhuitcd 



extremity and broader in the middle, in consequence of tubercles, those of the superior row being the lart^est, and more 



the columella sinus ; outer lip sharp on the margin, and po'"ted than the others ; whole shell covered with unequal 



minutely crenulated; inner lip very thin, and spreadino- spiral striae ; beak considerably produced, and appears but little 



over the front, sometimes nearly imperceptible; outside '^""•^''' aperture subquadrangular, extending from the superior 



generally cancellated, but destitute of varices or umbili- ''°''.''"" "^ ^'"^ ^"'"^ ' '""°'' ''1' "^' tl'itkcncd upon the colu- 



mella ; outer lip thin. 



Found in Alum Bay, Isle of Wight. 



cus; and covered with an excessively tliin epidermis. 



I. P. NEXiLis — The Wreathed Pyrida, pi. XXXV. fig. 

 6, 7. 



Pi/rula iie.rilis. Lamarck, Env. de Paris, fig. 67. Sowerby, 

 Min. Conch. IV. p. 33, pi. 331. Mure.v ne.rilis, Brander, 55. 



Pyriform, or obovate; spire very short, consisting of three 

 rounded volutions, and terminating in a rather obtuse apex; 

 whole surface covered with wide-set, elevated, longitudinal, and 

 spiral strite, the transverse striae, the most acute and uniform, 

 producing a beautiful cancellated appearance ; aperture long, 

 narrow, acute above, and terminating below in a contracted 

 canal. 



Found in the London Clay at Barton ClitT. 



2. P. Greenwoodii — Greenwood's Pyrula, pi. XXXV. 

 fig. 4, 5. 



Pyrida Greenwoodii. Sowerby, Min. Conch. V. p. 157, pi. 

 498. 



Pyriform, thin ; spire very short, consisting of four rounded 

 volutions, and terminating in a somewhat obtuse apex ; surface 

 covered with rather irregular, elevated, longitudinal, and trans- 

 verse stria?; aperture much elongated and narrow, pointed above, 

 and terminating below in a narrow canal ; beak considerably 

 pointed. 



Found in Hampshire, by Mrs. Greenwood. 



3. M. TUBEROsus The Tuberose Murex, pi. XXXIV. 



fig. 19. 



Murex tuberosiis. Sowerby, Min. Conch. VI. p. 152, pi. 

 578, fig. 4. 



Oblong-ovate ; body and spire of nearly equal length ; spire 

 small, consisting of three or four squarish volutions, terminating 

 in an obtuse apex, with a single row of blunted tubercles upon 

 the upper part of each volution ; whole shell beset with irregu- 

 lar spiral stria;; aperture subovate; beak very short, and slightly 

 produced. 



Found in the Pisolite at Malton. 



This shell differs considerably from the species of the same name 

 figured and described by Sowerby, vol. III. pi. i^Q, fig. 1. 



4. P. BL'LLATUS The Bossed Pyrula, pi. XXXIV. fig. 21. 



Murex Smithii. Var. /3. Spire produced. Sowerby, Min. 



Conch. VI. p. 151, pi. 578, fig. 3. 



Nearly orbicular; body large; spire short, consisting of three 

 rounded, slightly depressed volutions, and terminating in a ijp smooth, narrowing as it descends ; outer lip sharp on the 



Genus XXllL—FUSUS.— Lamarck. 



Shell fusiform, or subfusiform ; spire usually turreted, 

 with many rounded volutions, and gradually acuminated, 

 generally terminating in a pointed apex, although it is 

 sometimes mamillary ; for the most part with longitudinal 

 ribs and spiral grooves ; aperture elliptical, terminating in 

 a lengthened, straight canal. 



1. F. REGULARis — The Straight Fusus, pi. XXXV. fig. 15, 

 16, and pi. XXXVI. fig. 22, 23. 



Murex antiquus. Brander, Foss. Hant. p. 33, pi. 6, fig. 74. 

 Murex regularis, Sowerby, Min. Conch. V. p. 27, pi. 423, fig. 

 1, and ILp. 195, pi. 187, fig. 2. 



Elongated ; spire moderate, consisting of from five to eight 

 well rounded and somewhat inflated volutions, flattened and 

 nearly smooth above, terminating in a rather obtuse a])cx ; lon- 

 gitudinally ribbed, and crossed by numerous, fine, irregular, 

 spiral, sharp striae ; aperture elongated, wide, and somewhat 

 rounded above, narrowed below, and ending in an open, nearly 

 straight, rather short canal, which is contracted towards the 

 point ; inner lip smooth, in general broadly reflected on the colu- 

 mella above, and diminishing as it descends ; outer lip sharp on 

 the edge, and thin with a few plaits internally ; aperture to the 

 point of the beak equal in length to the other portion of the 

 shell. 



Found at Barton Cliff by Miss Salisbury. 



2. F. coMPLANATiJS The Flattened Fusus, pi. XXXV. 



fig. 21, 23, 24. 



Fusus complanatus. Sowerby, Min. Conch. V. p. 27, pi. 

 423, fig. 2, 3. 



Fusiform ; spire consisting of five volutions, with their upper 

 edges elevated, and pressed upon the spire; the whole surface 

 covered with large, oblique, longituilinal ribs, and crossed by 

 numerous, close-set, spiral stria;, with obtuse intervening ridges; 

 aperture ovate, contracted both above and below, and ending 

 in a curved, slightly expanding canal of medium length ; inner 



blunted apex ; body covered with large, distant knobs, set in 

 three interrupted rows; aperture ovate, narrowed above; cha- 

 racter of the beak unknown. 



Found in the London Clay at Maida Hill, Paddington. 



This species and the Uxo preceding are nearly allied to each other. 



edge ; beak somewhat shorter than the spire. 



Figure "21 is a variety in which the Iongitudin.il ribs are more 

 prominent tlian the others, and with a sub-earina in the middle of 

 the body. 



Found in the London Clay at Highgale Hill. 



