154 POPULAR CONCHOLOGY. 



port as with it ; for when they adhere to other 

 shells, the same object is gained by absorbing 

 a suitable place of attachment, on which the 

 same muscular impressions may be traced. 



27. Pileopsis. — Shell irregular, conical; the 

 apex lengthened, and re- 

 curved backwards; inside 

 dull. Animal, head dis- 

 tinct, having two ten- 

 tacula, with eyes at the 

 base; foot very large. — There are 10 species 

 recent, and 12 fossil. 



This shell is frequently called, from its shape, 

 the Fool's Cap Limpet. It is found in the Eu- 

 ropean Seas principally; but some very large 

 species are inhabitants of tropical climates, and 

 are met with in the Pacific Ocean, and in the 

 East and West Indies. The Pileopsis Ungarica 

 is the only one of which the animal is known. 

 The shells of this genus, like many of the 

 species of Patella, as before remarked, are 

 supposed to remain constantly attached to the 

 spot they have once fixed upon, from the cir- 

 cumstance that the form of the margin of the 

 shell agrees exactly with the portion of rock 



