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GENUs.—CY PRASA. 
Ovate or ovate-oblong, convex. the margins involute ; 
aperture longitudinal, narrow, toothed on each side, 
effuse at the extremities; spire all but concealed. 
C. Europea. Mont. p. 200. and Sup. 88.—Macgy. 
Aber. p. 175.—List. An. Ang. p. 168. t. 3. f. 17.— 
List. t. 706. f. 57.—D. p. 467.—F. p. 330.—C. 
PEDICULUs. VAR. EUROPEAN. Lin. 1180.—Don. t. 43. 
—Pen. 4. p.115. t. 70.f.82.—Da. Cos. p. 32. t.2.f. 
6.—C. CoccineLua. Lan. 66.—Blain: Faun. Franc. 
t. 9a. f. 1.—Oval, glossy, with transverse elevated stric 
and usually intermediate smaller ones, or bifurcated, 
livid flesh-coloured often with three dark spots on the 
tumid back which is always devoid of a longitudinal 
sulcus; outer lip and under part white.—Young, C 
Buuuata. Mont. p. 202. t. 6. f. 1.—Pellucid, the 
striz indistinct, outer lip not thickened, the apex 
slightly produced and formed into two or three convo- 
lutions. Common, Kent, &c. 
Orper.—CEPHALOPODA. 
Section.—POLYTHALAMIA. 
Chambered Shells. 
Grenus.—ORTHOUCERA. 
Straight or but shghtly arcuated, subconcal, striated 
