LEPAS. 
75 
number of small grey-brown glossy scales placed in an im¬ 
bricate manner, and concealing the skin : length nearly 
three quarters of an inch ; breadth about half an inch. 
Drifted wood: very rare. v. v. 
B. Fixed without stalk, conical, and furnished with an 
internal lid. Acorn-shell. 8, to 20. 
8 . Lepas Diadem a. Turban Acorn-shell. 
Litter, pi. 445. f. 288—Da Costa, pi. 17* f. 2-Dono- 
m, pi. 56. f. 1, 2— Wood , pi. 4. 
Shell roundish, hemispherical, a little compressed, with 
six valves, which with the intermediate spaces form twelve 
triangular compartments; the six raised ones with about 
four strong rounded wrinkled longitudinal ribs, with their 
pointed ends at the top of the shell; the other six are 
sunken and finely striate transversely, with their points at 
the bottom of the shell: color dirty white or grey, rather 
polished : the mouth or aperture funnel-shaped and six- 
sided: the base concave, divided into eighteen striate par¬ 
titions, projecting a little within the opening of the shell, 
ind finely toothed: lid membranaceous, ending in two 
valves : diameter at the base about two inches, and halt as 
much in height. 
On the back of whales : rare. v. m . 
* 9. Lepas Tintinnabulum. Bell Acorn-shell. Fig. 31. 
Litter, pi. 443. f. 285— Donovan, pi. 148 — Dorset Cat . 
pi 1. f. 5.—Wood, pl.6.f. 1,2. 
Shell more or less conic, a little angular, divided into 
twelve triangular compartments; the raised ones finely 
| striate longitudinally, and the sunken ones transversely: 
lid of four valves, two of them large, strongly striate trans- 
| versely, a longitudinal furrow dividing them from each 
other; color dull white, often with a mixture of purple? 
length nearly two inches; diameter of the base hardly 
one. 
On the bottoms of ships; and in Dublin bay it has been 
found affixed to the Ostrea opercularis, from which circum¬ 
stance it is clearly identified as a British production, v. v. 
h 2 10. Lepas 
