306 MOLLUSCA. PECTINIBRANCHIA. Cingula 



nata, Walk. Test. Min. 13. t. ii. f. 47-— T. cost. Adams, Linn. Trans. 



iii. 65. t. xiii. f. 13-14. Mont. Test. Brit. 311. t. x. f. 6 Common on 



the English shores, on fuci ; rare in Scotland, 



Length T 2 5 ths of an inch ; bi - eadth about J 5 th ; white, glossy ; whorls a lit- 

 tle rounded ; the ribs are strong, slightly waved ; on the body -whorl they end 

 in a strong spiral rib, which extends from the body -lip, behind the pillar, to 

 the outer lip ; this spiral rib is foDowed by a groove ; the spiral strife are most 

 conspicuous between the ribs. 



- 230. C. parva. — Whorls five, strong, with transverse ribs, 

 without spiral striae. 



T. quinque anfractibus subcarinatis apice purpureo apertura ovali, Walk. 

 Test. Min. 12. t. ii. f. 43 — T. lacteus, Don. Brit. Shells, t. xc— T. 

 parvus, Mont. Test. Brit. 310. — Among fuci, common. 



Length upwards of §th of an inch, conical ; white, brown, or tinged with 

 purple ; whorls rounded, with about twelve obtuse ribs, sometimes reaching 

 to the pillar, or only to the middle of the body -whorl ; aperture slightly ovate. 

 Montagu, in his account of this species, refers to the Turbo aeretis and T. sub. 

 luteus of Adams, Linn. Trans, iii. 65. 



231 . C. marginata. — Shell subcylindrical ; whorls six, finely- 

 striated spirally, with about six transverse ribs. 



Laskey, Mont. Test. Brit. Supp. 128. Wern. Mem. i. 406. t. viii. f. 13. 

 — Hitherto found only at Guernsey and Dunbar. 



Length |ths of an inch ; breadth fths less ; white ; very strong, the ribs 

 gradually becoming obsolete at the line of separation ; aperture patulous. 



232. C. reticulata. — Shell conical, having six, rounded, regu- 

 larly reticulated spires, with a slight pillar-cavity. 



T. subumbilicatus quatuor anfractibus reticulatus, apertura subrotunda, 

 Walk. Test. 9. t. ii. f. 32 — T. ret. Mont. Test. Brit. 322. t. xxi. f. 1. 



— Among shell-sand, rare- 



Length about T 'j,th of an inch ; breadth Jgth ; white or brown ; aperture 

 suborbicular ; the transverse striae do not appear on the lower part of the bo- 

 dy-whorl, where the spiral striae are most conspicuous. The Turbo punctura 

 of Montagu, Test. Brit. 320. t. xii. f. 2. appears to be the young of this species, 

 or before the rib of the lip is formed ; the same also as Turbo retiformis, Walk. 

 Test. Min. 20. t. ii. f. 37- 



233. C. conifer a. — Shell conical ; whorls six, with about 

 twelve transverse undulated ribs ; the interstices at the top of 

 the whorls formed into small cavities. 



T. con. Mont. Test. Brit. 314. t. xv. f. 2 — Found by Mr Bryer, at Wey- 

 mouth, rare. 

 Length |th of an inch ; breadth |ds less ; white ; the cavities of the top of 

 the spires give the separating line a denticulated appearance ; the spiral striae 

 are numerous and fine ; aperture oval, oblique, strongly marginated. 



234. C. denticulata. — Shell conical ; whorls six, with ten 

 transverse straight ribs projecting at the top of each. 



Turbo dent. Mont. 315. — Weymouth, Mr Bryer.— St Andrew's, Miss Lam- 

 bert. 

 Length about ^th of an inch; breadth about one-half less; white, subpel- 

 lucid ; no spiral striae ; the ribs join the pillar-lip, covering the whole body- 

 whorl ; aperture suborbicular ; pillar-lip with one or two tubercles at the base, 

 adjoining the rib?. 



