lis 



acute, and reldom lefs than twenty in number. As this fliell 

 advances in age and fize it becomes white, and ufuaily grows 

 thicker, and the ridges lofe their fliarp edge ; fuch, of three 

 quarters of an inch in length, accompanied the others from, 

 Scotland. 



Previciis to the kind communications of our friends, w^e 

 had difcovered this fpeciesin a tour througli Liucolnjbire ; fo 

 that it is by no means confined to the northern fiiores, but in 

 all probability is fometimes thrown up on moft of the north- 

 eaftern parts of South Britain, where the fandy flats prevail. 



Proximus. Shell thick, white, with fix flrongly coftated fi)ires ; apex 

 Tab, 30, f, 8. moderately pointed : aperture ovate-oblong : outer lip re- 

 markably broad, and reflexed ; the canal fliort, and rather 

 fpreading at the end. Length nearly half an incli. 



This (hell might readily be miftaken for an extraordinary 

 growth of Murex cojlatus, but it differs materially from that 

 fpecies in the number of ribs, being poflefled of eleven on 

 the body or lower volution, whereas the cojlatus never has 

 more than eight, and ufually only feven, and thofe are 

 broader. 



Found by Mr. Laskey, on Tyningham fands, near Dunbar^, 

 and is extremely rare. 



TROCHUS. 



