MOLLUSKS 



143 



These capsules are produced in spring and summer, but newly laid 

 ones are also abundant in Long Island Sound during September. 



Formerly the 

 Indians used 

 these shells for 

 the manufacture 

 of their white 

 wampum. 



From Cape 

 Ilatteras to Cuba 

 we find still an- 



Fig. 102; English Whelk and its Egg Cocoons. other whelk 



fFulgur perversa), which resembles the Knobbed Whelk, but it is 

 streaked longitudinally with dull, purple-brown, and its shell is 

 coiled in a left-handed spiral. 



The English Whelk, {Buccinuin undatiun, Fi<j. I02j,is a com- 

 mon sea snail in shallow water north of Cape Cod. It ranges, how- 

 ever, from Cape Ilatteras to the Arctic Ocean, and is also found on 



ftg. <)4; HORSE MUSSEL, OR BEARDED MUSSEL. From life. A 



scale-limpet (Patella tesluditialts), and seven egg cocoons of the 



Rock Snail (Purpura lapillus) are seen upon the right hand 



shell. Cape Ann, Massachusetts. 



the northern coasts of Europe. On the Maine coast it is found at 

 low tide level, but south of Cape Cod it lives in deep water, having 

 been taken from a depth of 3,900 feet. 



