MOLLUSKS 148 
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 
Hatteras to Cuba 
we find still an- 
other whelk 
(Fulgur 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, ( Buccinwm undatum, Fig. 102), 1s a com- 
mon sea snail in shallow water north of Cape Cod. It ranges, how- 

Fig. 102; English Whelk and its Egg Cocoons. 
ever, from Cape Hatteras to the Arctic Ocean, and is also found on 

Fig. 94; HORSE MUSSEL, OR BEARDED MUSSEL. From life. A 
scale-limpet (Patella lestudinalis), 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. 
