CONCHYLIA— D/THrie.4. 1. 



verse series in each valve under the reflected margin of the hinge 

 at the back, and which are covered when alive by a fold of the 

 animal mantle and the cardinal accessorial plates. 



It is subject to much variation in shape, and often distorted, 

 being sometimes as long as it is broad. When lodged in the stumps 

 of old trees covered by the sea, and exposed only at the lowest tides, 

 it attains a very considerable size, as some specimens in our cabinet 

 measure full two inches long and seven in breadth. 



Pholas testa ovatd, latere antico hiantissimo rostrato, margine supra parva. 



dentes tubercido Icevi, accessorio unico cardinali. 

 Shell oval, very open and produced in a beak at the anterior end, 

 with a smooth tubercle on the margin above the teeth, and a 

 single accessorial valve at the hinge. 

 Pholas parva. Pennant, Brit. Zool. iv. p. 157, tab, 43. tig. 1. 



Montagu, Test. Brit. p. 22, tab. 1. fig. 7 and 8. 

 Turton, British Fauna, p. 145. 

 Linn. Trans, viii. p. 33. 

 Wood, Conch, p. 38. 

 Dillwyn, Descript. Catal. p. 82. 

 Turton, Conch. Diet. p. 143. 

 Mus. nost. Plentifully in the rocks in Torbay. 



A very elegant species, growing to about three quarters of 

 an inch in length, and an inch and a half broad, but is usually less, 

 and may be readily known by the wide and oval opening which 

 extends into a beak, by the want of cells under the reflected margin 

 at the back, and the round smooth tubercle placed upon the 



