LEPAS. 
10. Lepas Scotica. Scotch Acorn-shell. 
Wood, pi. 6. f. 3. 
Shell with six raised unequal triangular valves, ribbed 
longitudinally and striate transversely at the base: color 
dirty white, with a greenish tinge : lid like that of the last: 
hardly an inch long, and half as much broad. 
Scotland, on the Mytilus Modiolus : rare. 
11. Lepas rugosa. Wrinkled Acq m-shoil. 
Linn. Trans . viii. pi. 1. f. 5— Dorset Cat. pi. 2. f. 10— 
Wood , pi. 6. f. 4. 
Lepas borealis. Donovan, pi. 160. 
Shell somewhat rhombic, with six triangular valves, the 
hinder ones broader than the rest, smooth or ribbed and 
wrinkled longitudinally, with strong longitudinal grooves 
within, of a whitish or pale purple color: aperture large, 
oval, often nearly as wide as the base, and a little angular, 
the upper part of the inside ribbed transversely: lidof four 
rough valves, not striated, angular, and terminating in 
four distinct sharp points which are u little reflected: 
length above half an inch j breadth a quarter. 
In Dublin bay they are found fixed to the Chstreaoper- 
cularis, often ribbed across in an oblique or undulate man¬ 
ner, as if they had taken, by reflexion the markings of the 
shells on which they grew : the sunken triangles are also’ 
finely striate transversely, and crossed by a few longitudi¬ 
nal ribs. v. v. , 
12. Lepas Alcyonii. Sea-mat Acorn-shell. 
Shell somewhat conic; white or brownish white, with six 
valves of very unequal and irregular size, terminating h 
rather sharp points : aperture large, oval or roundish: lid 
of four valves, the two uppermost smooth, pointed, gaping 
a little at top, and protruding in the middle into a kind of 
keel : diameter and height about the eighth of an inch. 
For the discovery of this species we are indebted to 
Dr. Leach, as we are informed. On the Devonshire coast 
it is dredged up, attached to the Alcyonium and Flustra; 
V> v. 
13. Lepas 
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