OCE/1N ANIMALS : SPONGES, SEA-ANEMONES, ETC. 141 



The edible clams are of several different species. The 

 hard-shell clam or " quohog " as it is often called, is 



Fig. 103. — The giant yellow slug of California, Ariolimax califorfiica. 

 This slug reaches a length when outstretched of twelve inches, 

 (From living specimen.) 



found along the Atlantic coast from Texas to Cape Cod. 

 It is common on sandy shores, living chiefly on the 

 sandy and muddy plots just beyond low-water mark. It 



Fig. 104. — Tliree Pacific Coast nudibranchs or sea slugs; Doris titbcrciilata 

 (in lower left-hand corner), Echijwdoris sp. (upper one), and Triopha 

 modesta {?X right). (Natural size; from living specimens in a tide- 

 pool on the Bay of Monterey, California. ) 



also inhabits estuaries, where it most abounds. It burrows 

 a short distance below the surface, but is frequently 

 found crawling at the surface with the shell partly ex- 

 posed. The soft-shell clam, "the clam par excellence, 

 which figures so largely in the celebrated New England 



