375 Shells (two) and pearls (ten) from the common 



Clam (Venus mercenaria), white, brown, 

 purple and black. Long Island Sound, New 

 York. 



376 Pearls and Shell of Venus fluctifraga. San Diego 



Bay, California. 



377 Pearls from the common oyster, Ostrea borealis, 



eight, one the size, shape, with the mark- 

 ing of a human eye, alt of no value. Long 

 Island Sound. 



378 Pearl and Shell, Pachyderma crassatelloides. San 



Diego, California. 



379 Common Conch (Strombus gigas). Key West, 



Florida. 



380 Pearls from Common Conch. 



381 Pearl Oyster, Avicula (Meleagrina) margaritifera 



(two shells), with pearl adhering. Lower 

 California. 



382 Same with nacreous protuberance. 



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