PHASIANELLA. 537 



Brit. Animals, p. 299.— Couch, Cornish Fauna, pt. 2, p. 

 57.— Wood, Index Testae, pi. 31, f. 47. 

 Tiirho htppocastaniim. Lam. Anini. s. Vert. (ed. Desh.) vol. ix. p. 198. 



„ crenulatus, Gmelin, Syst. Nat. p. 3595 (from Chem. vol. v. f, 1811, 1812). 

 — KiENER, Coquilles Vivant. Turbo, pi, 27, f. 1. — Reeve, 

 Conch. Icon. vol. iv. pi. 10, f. 42, 



A West Indian shell; introduced hy Donovan as from the 

 Scilly rocks. 



PHASIANELLA, Lamarck. 



Shell usually rather compact, not nacreous, smooth, 

 ovato-conical, with a produced spire. Aperture oval, the 

 lips not continuous on the body whorl. Operculum cal- 

 careous, solid, tumid externally, subspiral on the inner 

 surface. 



Animal having the head muzzle-shaped ; tentacula long, 

 ciliated, eyes in distinct peduncles at their external bases ; 

 no intertentacular lobes ; neck with a strongly fimbriated 

 lobe on each side ; lateral superior expansion of the foot 

 with three cirrhi on each side, the middle pair often very 

 small ; foot rounded in front, pointed behind ; vent on the 

 right side and shortly tubular ; branchial plume long, 

 single, partially free ; tongue closely resembling that of 

 Trochus. 



The only species of this beautiful genus which inhabits 

 the British seas runs no risk of being confounded with the 

 Trochi, though its animal is very nearly allied indeed to 

 that group. 



VOL. II. o z 



