SIMPSON CONTRIBUTIONS TO THE MOLLUSCA OF FLORIDA. 7 I* 



Pecten nodosus L. Odd valves very rarely found washed up on the 

 West coast. Normal pairs are seldom found, and are held at an extrav- 

 agant price by local collectors. 



Pecten dislocatus Say, West coast ; Long Key. Several varieties. 

 A small brilliant scarlet specimen was dredged in Tampa Bay, and I 

 have a large pair from Long Key, which are a bright orange and brown. 



Pecten nucleus Born. There can be but little doubt that this and 

 P. dislocatus belong to the same species. After a storm I picked up, 

 on the lower end of Anna Maria Key, over a hundred pairs of P. 

 nucleus, which exhibited among them every pattern of coloring found 

 in either. There were pure white shells, specimens variegated with 

 white, orange, brown, and purple, others a uniform brown, and ashy, 

 dotted with white; still others were pink, scarlet, purple, and various 

 shades. As the young shells of P. dislocatus are thinner and less inflated 

 than these, I am inclined to regard this rather as a small race than the 

 young of that species, as has been surmised. 



Anomia glabra Verrill. West coast; inhabiting dead shells. On 

 one occasion I found millions of these fragile shells washed up, in per- 

 fect condition, on the upper end of Anna Maria Key. I have it from 

 the east coast of Florida. 



Ostrea virginica Gm. Everywhere common in bays and brackish 

 water. 



Ostrea equestris Say. Sarasota Bay. 



Ostrea parasitica Lam. Tortugas; Honduras. 



Lingula pyramidata Stimp. A few living specimens were dug out 

 at Long Key, on the inner shore, at dead low tide, in a bank of mud 

 and shells, in the winter of 1884. They were moored to shells, the 

 pedicel extending down several inches in the mud, while the animal 

 itself was found near the surface. I have found a few detached valves 

 elsewhere on the West coast. It is found at Norfolk, Virginia, and on 

 the coast of North Carolina, and is reported from Cedar Keys by Mr. 

 Hemphill. It is the L. antillarum of Reeve. 



ADDENDA. 



Murex salleanus A. Ad. A species of Murex found on the West 

 coast somewhat commonly, and which I have had repeatedly identified 

 for me as above, is probably a form of M. rufus Lam. Mr. Tryon 

 states that M. salleanus is probably synonymous with M. pomum Gm., 

 bat this is certainly an error. M. rufus has been erroneously called M. 

 adustus Lam. 



Hydrobia monroensis Frau. According to Mr. Pilsbry, the little 

 shells from Hillborough River which are called Amnicola floridana 

 Frau., in this paper, are not an Amnicola, at all, but are Hydrobia mon- 

 roensis. 



