OF THE UNITED STATES. 333 



abbreviated or interrupted lines, not incrassated, 

 purple-black; columella at base with a prominence 

 or fold. 



Leugth three-fifths of an inch. 



Inhabits the coast of the United States. 



Cabinet of the Academy and Philadelphia Mu- 

 seum. 



Animal — Foot as long as the shell, rounded be- 

 fore, with the anterior angles elongated, conic, re- 

 flected and resembling short tentacula ; head not ex- 

 tended beyond the shell ; eyes above the base of the 

 tentacula, placed on their exterior side and black ; 

 tentacula setaceous, abruptly smaller above the eyes; 

 trunk cylindrical, the suture beneath, exserted over 

 the head, half as long as the shell and very con- 

 spicuous. 



Inhabits the shores of our estuaries in great num- 

 bers. When left by the recess of the tide, they col- 

 lect together in small pools, or crawl in pursuit of the 

 retiring water ; but when left quite dry, they burrow 

 in the sand so as to conceal themselves from the ac- 

 tion of the sun, and patiently await the returning 

 tide. They assemble about dead crabs and other 

 animals, and appear to feed upon them. 



This shell is more frequented by Pagurus longi- 

 carpus than any other; it bears a general resemblance 

 to the preceding species, but is sufficiently distin- 

 guished by being less elongated, the suture and im- 

 pressed lines not being so profound, and the beak 

 less prominent and distinct ; the colour also is very 

 different. 



29 



