Phasianella. MOLLUSCA. PECTINIBRANCHIA. 301 



207. T. bicolor. — Smooth, dull, inside white ; whorls two ; pillar-cavity in- 

 distinct. — Helix bicolor, Adams, Linn. Trans, v. 4. t. i. f. 25, 26, 27. — Ten- 

 bigh. 



208. T. variegatus Subpellucid, smooth ; whorls four, the first ventri- 



cose, with red lines ; margin of the aperture very much spread ; no pillar- 

 cavity Helix var. Adams, Linn. Trans, iii. 67. — Coast of Pembrokeshire. 



209. T. tubidatus Whorls three, striated ; pillar-cavity produced into a 



marginated tube. Helix tub. Adams, I ^inn. Trans, iii. 67 Coast of Pem- 

 brokeshire. 



EXTINCT SPECIES. (TURBO.) 



1. T. ornatus. — Conical, spirally striated ; three or four tuberculated ridges 

 run along each whorl, the middle one the largest. — Sower. Min. Conch. 

 t. ccxl. f. 1, 2 In Loiver Oolite, Dundry. 



2. T. carinatus Conical, with five or six spiral crenulated ridges ; whorls 



carinated. — Sower. Min. Conch, t. ccxl. f. 3. — In Green Sand. 



3. T. monilifornris. — Short, conical, spirally striated ; whorls separated 

 above by a canal, their edges granulated ; pillar-cavity large, wrinkled. — 

 Sower. Min. Conch, t. cccxcv. f. 1. — In Green Sand, Blackdown. Probably 

 not of this genus. 



4. T. sulcatus Conical, sulcated spirally, striated transversely; whorls 



rounded, separated above by a canal ; pillar-cavity small ; aperture sulcated 

 within. — Pilkington, Linn. Trans, vii. 118. t. xi. f. 9. — T. sculptus, Soiver. 

 Min. Conch, t. cccxcv. f. 2. — In London Clay. 



5. T. conious Ovato-conical, acute, whorls very convex, spirally striated ; 



with a pillar-cavity — Soiver. Min. Conch, t. ccccxxxiii. f. 1. — In Green Sand, 

 Blackdown. 



6. T. rotundatus. — Ovate, subglobose, pointed, smooth ; aperture rather 

 longer than wide, pointed retrally. — Sower. Min. Conch, t. ccccxxxiii. f. 2. — 

 In Green Sand, Blackdown. 



Ge*. XLVIII. PHASIANELLA— Shell conical ; aperture 

 lengthened, contracted by the projection of the body- 

 whorl ; peristome incomplete retrally ; pillar-lip smooth, 

 nearly straight. 



- — 210. P. polita. — Whorls nine or more, conical, strong, flat, 



smooth, closely united. 



Helix pol. Putt. Dorset, p. 49. Mont. Test. Brit. 398 — Turbo albus, 

 Don. Brit. Shells, t. clxxvii. — On the English shores. 



Length jjths of an inch, breadth ,%ths ; aperture oval, contracted retrally 

 by the body -whorl. 



211. P. subiilata. — Whorls about ten, subulate ; with two 



spiral brown bands along the separating line. 



Turbo sub. Don. Brit. Shells, t. clxxii Helix sub. Mont. Test. Brit. 



Sup. 142 — On the English and Scottish coast, not common. 



Length about three quarters of an inch ; smooth, glossy, white; the two 

 bands are on the retral edge of the nearly obsolete line of separation ; whorls 

 nearly flat ; aperture lengthened, rounded anteally, contracted retrally : 

 outer-lip nearly straight. 



