416 account of 



VenuSo 



Neill, with a specimen of 

 this last shell, found by 

 him in the Orkney Isles, 

 agreeing in toto with 

 Pennant's figure. The 

 oblique slope on the 

 left margin of V. lac- 

 tea, is a sufficient dis- 

 crimination from any 

 of the others confound- 

 ed with it. This shell 

 is the Venus incrassata 

 of Solander, from the 

 Portland cabinet, and is 

 not unusually met with 

 on the Guernsey coast. 



BULLA. 



Lignaria* P. D. M. Found by Mr Urquhart 



at Rothiesholm-head, 

 Stronsa, Orkney. 



TROCHUS. 



T. zyziphynus. f.D.M. Found by Mr Neill in 



Orkney frequent*, and 

 kindly added to my 

 North British collec- 

 tion. 



