310 MOLLUSCA. PECTINIBRANCHIA. Odostomia. 
the Turbo Ziczac of Maton 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 x^ths of an inch ; breadth less than y’gth ; 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 y’oth, breadth g’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 Turho inter - 
stinctus of Adams, Linn. Trans, iii. 66. t. xiii, f. 23, 24. 
257. O. insculpta. — Whorls 6, rounded, and regularly striat- 
ed spirally. 
Turbo in. Mont. Test. Brit. Sup. 1 29 — Coast of Devon, rare. 
Length |th of an inch, breadth fds less ; subpellucid, white ; taper, apex 
obtusely pointed ; aperture subovate ; pillar-lip a little reflected, with a small 
cavity behind. 
258. O. Sandvicejisis.—^^ The three spired elegantly reti- 
culated turbo, with a one-toothed oval aperture, from Sand- 
wich, rare.”— Test. Min. 15. t. ii. f. 55. 
