135 
or three ray-like indentations running from the margin 
towards the apex; the pillar lip slightly turned inwards, 
y...¢. Devonshire, &c. not common. 
P, MempranackEa. F. p. 291.—LameEtyiaria M. 
Mont. in Lin. T. 11. p. 184. ¢ 12. 7. 3. animal) f. 4: 
—Ovate, excessively thin, flat, with a minute lateral 
whorl, silvery tinged with pink, 2. English Coast, 
rare. 
Tripe.—CALY PTRACIAN J: 
Shell always external. 
Grenus.—E MARGINULA. 
Conical, shield-shaped, the vertex inclined to one side ; 
internal cavity simple ; posterior margin cleft or 
emarginated. 
E. Fissura.. Lam. 1.—Ff. p. 364.—Patetia F, 
Lin. 1261.—D. py. 1054.—Pen. 4. p. 144. t. 90. f. 
151.—Jist. t. 543. f. 28.—Don. t. 3. f. 2.—Mont. p: 
490.—Dor. Cat. p. 59. t. 23. f. 4.~-Conical, white or 
yellowish with close. set prominent radiating ribs, can+ 
cellated in the interstices by transverse striz, pellucid, 
apex reflected ; margin crenated ; slit narrow and long. 
variety (RosEa. Bell in Zool. J. 1.t.4 f. 1.) apex 
higher and more recurved ; inside rose-colored. 4...3. 
Hi. Coasts. 
