394 



Mttilus. 



ACCOUNT OF 



shell, otherwise I cannot 

 but think the y would not 

 have so decidedly made it 

 a variety only I regret 

 that Mr Racket, one of 

 these compilers, did not 

 find it convenient to avail 

 himself of a view oi the 

 collecion where this shell 

 stood, with all itsvariations 

 of growth, from the size 

 of a small pea to the lar- 

 gest size, in 16 gradations. 

 9. ungulinus. D. M. On the shore near Gulon 



Links, Aberlady Bay, ve- 

 ry rare. 



M. New shell, Isle of Sky, very 

 rare ; only one live speci- 

 men having been met with. 

 M. New species, in sand near 

 Dunbar. W WH,tU, if. 

 P. D. M. In the river Tyne, near Lord 

 Haddington's, at Tyning- 

 hanij and Water of Leith. 



PINNA. 



Animal a Limax. Shell sub-bivalve, fragile, up- 

 right, gaping at one end, and furnished with a 

 byssus or beard. Hinge without teeth ; the 

 valves united into one. 



10. plicatus. 



11. decussatus. 



12. anatinus. 



1. ingens.l 

 Isevis. J 



P.M. Found by Dr Walker off 



D, 



Barra, one of the Western 

 isles. A small specimen 

 was found by me at Sca- 

 lasdale, in the Sound of 

 Mull. 



