168 PHYLLOBRANCHIA. TURBONIDZ. 
3. costata. Testa alba, glabra ; anfractibus sex, basilari non cos- 
tato, quinque superioribus costatis. 
4. Cranchiana. Testa alba, suturé minis profunda ; anfractibus 
quinque, glaberrimis. 
1. ALVANIA STRIATA. 
A. testa sordidé alb4; anfractibus sex, spiraliter striatis, niti- 
dissimis. 
Turbo striatus, Walk. Test. Min. Rar. f. 49; Addams, Micros. 
t. xiv. f. 22; Trans. Linn. Soc. ii. 66. t. xi. f. 25, 26; 
Mont. Test. Brit. ii. 312; M. & R. Trans. Linn. Soe. viii. 
173; Flem. Edinb. Encycl. vu. 75; Dill. Desc. Cat. 786 ; 
Turt. Conch. Dict. 213. sp. 50. 
Habitat in mari Britannico in profundo. Alt. 2 unc. 
Shell dirty white, spirally striated, very shining and white. 
Height two-eighths of an inch. 
This species was first discovered by Mr. Boys in Sheppey 
Island, and is very common on all the western coasts of Devon, 
Cornwall, Scotland, Wales, and Ireland. 
2. ALVANIA GLABRA. 
A. testa alba, glabra; anfractibus quatuor, ultimis ad dextram 
linea sculptis. 
Habitat in mari Danmoniensi. Mus. nost. in Mus. Brit. Alt. 
4 une. 
Shell white, smooth. The four last whorls on the right side 
with a sculptured line. Height one-eighth of an inch. 
Inhabits the sea, Plymouth Sound. Discovered by Mr. J. 
Cranch. 
3. ALVANIA COSTATA. 
A. testa alba, glabri; anfractibus sex, basilari non costato, 
quinque superioribus costatis. 
3. testa flavescente. 
Turbo costatus, Walk. Test. Min. Rar. f.47 ; Adams, Micros. 
t. xiv. f. 20; Trans. Linn. Soe. iti. 65. t. Ixv. f. 13, 14; 
Mont. Test. Brit. 311.—Suppl. t.x.f. 6; Pult. Cat. Dorset. 
