224 CONCHYLIA— D/rHrj?J. 49. 



cover nearly the whole surface, and are clothed with numerous con- 

 cave scales : the top flat, and running in a nearly straight line down 

 the open side, whence it slopes to a slightly curved point. 



papyracea, PiNNA testa ovato-trigond corned, costis 9 remotis muticis. 



Shell oval triangular horn-color, with 9 remote unarmed ribs. 



Tab. nost. 20, fig. 3. 

 Pinna papyracea. Chemnitz, viii. p. 243, tab. 93, fig. 786. 



Dillwyn, Descript. Catal. p. 331. 

 Mus, nost. Dredged off" Torbay. 



Shell four inches and a half long, and two and a quarter wide, 

 thin, brittle, horn-color, purplish towards the pointed end, and 

 marked with a blotch of the same color about the middle of the 

 cartilage side ; with 9 remote broad rounded and prominent ribs 

 which cover nearly the whole surface : the broader end nearly flat, 

 but rounded at the open side j the pointed end runs quite straight 

 and without incurvation. 



The Pinna vitrea of Chemnitz, p. 216. tab. 87, fig. 772, is a very 

 good representation of the shell, and is probably the same in a 

 younger and more delicate state. 



murieata. PiNNA testd trigond carneold, costis 7 concavo-spinosis. 



Shell triangular pale carnation, with 7 ribs armed with concave 



spines. 

 Pinna murieata. Montagu, p. 183, tab. 5, fig. 3. 

 Linn. Trans, viii, p. 113. 

 Turton, British Fauna, p. 165. 

 Pennant, Brit. Zool. iv. p. 244. 



