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- 



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

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

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



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



marginated tube. Helix tub. Adams, Linn. Trans, iii. 67 Coast of Pem- 

 brokeshire. 



EXTINCT SPECIES. (tuRBO.) 



1. T. omalus. — 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 Lower 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. moniliformis. — 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 spiraDy, 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, Sower. 



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



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

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

 Blackdown. 



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



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



In Green Sand, Blackdown. 



Gen. 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. Pult. Dorset, p. 49. Mont. Test. Brit. 398 — Turbo albus, 

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



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

 by the body-whorl. 



211. V. subulata. — 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. 



