310 MOLLUSC A. PECTIN IBRANCHIA. Odostomia- 



the Turbo Ziczac of* Mates and Rackett, Linn. Trans, viii. 160.'t. iv. f. 14' 

 found near Sunderland by Lady Wilson, is probably similar to this species, 

 may be regarded as correct. 



Gen. LI. ODOSTOMIA. — Shell conical ; aperture ovate ; 

 peristome incomplete retrally, and furnished with a tooth 

 on the pillar. 



253. O. unidentata. — Shell smooth, whorls five, slightly 



rounded, subpellucid. 



Turbo un. Mont. Test. Brit. 324. t. xxi. f. 2.— From deep water, not 

 common. 



Length |th of an inch; breadth |ds less; white, glossy, delicate; sepa- 

 rating line distinct ; apex blunt ; aperture ovate, a little expanded anteally ; 

 pillar-lip slightly reflected, ending retrally in a small tooth. 



254. O. plicata. — Shell smooth ; whorls seven, nearly flat. 



Turbo plicatus, Mont. Test. Brit. 325 — In deep water, not common. 



Length f 5 ths of an inch ; breadth less than T ' 5 th; white, opaque, solid; se- 

 parating line distinct ; aperture ovate ; the outer lip nearly straight retrally ; 

 pillar-lip reflected, with a cavity behind ; the tooth, in the form of a ridge, 

 near the middle of the pillar. — The descriptions of these two species have, by 

 some accident, been intermingled in Testacea Britannica. 



255. O, spiralis. — Whorls 5, the lower part of the largest 



striated spirally ; the remainder of the shell ribbed transversely. 



Turbo longitudinaliter striatus quinque anfractibus apertura subrotun- 



da, Walk. Test. Min. 13. t. ii. f. 46 Turbo spiralis, Mont. Test. 



Brit. 322. t. xii. f. 9 In Salcomb Bay, and Zetland. 



Length j^th, breadth o'gth of an inch ; pellucid, glossy, white ; whorls 

 nearly flat ; the two upper spiral lines are the largest, join the outer lip, and 

 are continued along the separating line ; the transverse ribs are numerous, 

 and slightly raised ; aperture ovate, the outer lip nearly straight retrally ; 

 pillar lip reflected, with a slight cavity behind ; the tooth or fold is minute. 



256. O. interstincta. — Whorls 5, rather flat, and finely rib- 

 bed across. 



T. int. Mont. Test. Brit. 324. t. xii. f. 10 Coast of Devon, rare. 



Length one line, breadth fds less ; glossy, white ; whorls divided by a 

 small separating line; apex obtuse; aperture suboval; pillar lip a little re- 

 flected, with a small tooth. Montagu refers to this species the Turbo inlcr- 

 stinctus of Adams, Linn. Trans, iii. Go", t. xiii. f. 23, 24. 



257. O. insctdpta. — Whorls 6, rounded, and regularly striat- 

 ed spirally. 



Turbo in. Mont. Test. Brit. Sup. 129 Coast of Devon, rare. 



Length |th of an inch, breadth §ds less ; subpellucid, white ; taper, apex 

 obtusely pointed ; aperture subovate ; pillar-lip a little reflected, with a small 

 cavity behind. 



258. O. Sandvicensis. — " The three spired elegantly reti- 

 culated turbo, with a one-toothed oval aperture, from Sand- 

 wich, rare."— Walk. Test. Min. 15. t. ii. f. 55. 



