JO* LE?AS. 



10. Lepas Scotica. Scotch Acorn-shcU. 

 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 Acorn-shell '. 



.Linn. Trans, viii. pi. 1. f. 5 Dorset Cat. pi. 2. f. 10 

 Wood, pi. 6. f. 4. 



Lepqs 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 : lid of four 

 rough valves, not striated, angular, and terminating in 

 four distinct sharp points which are a little reflected : 

 length above half an incli ; breadth a quarter. 



In Dublin bay they are found fixed to the Ostrea oper- 

 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. Sta-mat Acorn-shell 



Shell somewhat conic ; white or brownish white, with six 

 valves of very unequal and irregular size, terminating in 

 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 3 attached to the Alcyomurn and Fiustra: 

 V. w, 



13. Lepas 



