Cingula. MOLLUSCA. PECTINIBRANCHIA. 305 



8. T. Uril— Elongated, striated transversely. Ure's Hist. Ruth. 308. 

 t. xiv. f. 7» — Limestone of the Coal Formation. 



9. T. elongata.— Elongated, striated spirally. Ure's Hist. Ruth. 308. t. xiv. 

 f. U. 



10. T. constricta. — Turrited, smooth; whorls eight or ten ; convex below, 

 contracted above, with an adpressed crenated margin. Turbo con. Mart. Derb. 

 t. xxxviii. f. 3 Melania con. Sower. ~Min. Conch, t. ccxviii. f. 2 — Carboni- 

 ferous Limestone. 



Gen. L. CINGULA. — Aperture of the shell with the peristome 

 complete, being united rctrally. 



* Outer lip thickened by a rib. 



- 225. C. cimex. — Whorls four, strong; ribbed coarsely, trans- 

 versely and spirally. 



Turbo cim. Linn. Syst. Nat. i. 1233. Don. Brit. Shells, t. ii. f. 1. Mont. 

 Test. Brit. 315..— Southern coasts, not common. 

 Length about |th of an inch ; white; whorls with the separating line deep 

 and ragged ; meshes of the ribs forming quadrangular pits, in six rows on 

 the body-whorl, and two on the second. 



226. C subcarinata. — Whorls three, little produced, with 

 three spiral ridges, and numerous transverse striae. 



Helix sub. Mont. Test. Brit. 438. t. vii. f. 9 — Tiochus rugosus, Bo-own, 

 Wern. Mem. ii. 520. t. xxiv. f. 5. — Coasts of England and Ireland. 

 Breadth about T \jtb of an inch, depressed ; glossy, frosted * two of the spi- 

 ral lines are on the lower part of the body -whorl, and one on the upper ; pil- 

 lar-cavity wide and deep ; aperture oval. 



227. C. calathisca. — Whorls six, with numerous transverse 

 and spiral ribs. 



Turbo cal. Laskey, Mont. Test. Brit. Supp. 132. t. xxx. f. 5 — West 

 coast of Scotland and England, rare. 

 Length £th of an inch ; brown ; conical ; the pits formed by the intersection 

 of the ribs are more numerous than the last, being in eight rows on the body- 

 whorl, and four on the next ; aperture with the outer lip denticulated within. 



-228. C. striatula. — Whorls five, spirally ribbed, longitudi- 

 nally striated, each terminating in a flat top. 



Turbo stri. Mont. Test. Brit. 306. t. x. f. 5 — Turbo monilis, Turton, 



Conch. Diet. 200 On the English coast, rare. 



Length T 2 5 ths of an inch ; ovate, obtuse, white ; whorls with fine spiral 

 striae, which, towards the upper part of each volution, rise into three mem- 

 branaceous ridges ; those near the pillar are likewise elevated and strong ; the 

 transverse striae are numerous, but principally obvious in the furrows, yet 

 giving to the shell a pretty cancellated appearance ; aperture suborbicular, 

 angulated at the upper part. 



- 229. C. costata. — Whorls five, spirally striated, and trans- 

 versely ribbed ; a groove behind the outer lip, extending behind 

 the pillar to the aperture. 



Turbo crassus, clathratus, quinque anfractibus apertura rotunda mirgi- 

 VOL. I. U 



