CEUION, GUOUP V. 215 



BOCA CHICA KEY. Accord ing to Binney (Manual Anier. L. 

 Shells, p. 420), Hemphill collected specimens 36 mill. long. 



KEY VACCAS. At tlie east end of tin's Key, Dr. J. W. Velio 

 collected many specimens of a small, thin form, with short terminal 

 cone, and the sculpture of typical Key West shells. Color fleshy- 

 white, more or less suffused or clouded with flesh-color, and sparsely 

 or copiously streaked with livid spots, The peristome is thin and 

 narrow. Size: 23x8; 22x8^ to 18x8 mill. This slightly individ- 

 ualized race may stand as form vaccinum (pi. 29, fig. 51). 



BISCAYNE KEY. Form fasciata W. G. B. (pi. 29., fig. 47). 

 Rather small shells, somewhat more sharply and roughly sculptured 

 than th'e Key West type, occur at the lower end of this Key. They 

 are practically typical in size and form, and on a pale-brownish 

 ground are striped with brown, the stripes zigzag and ragged on the 

 cone, more regular below. 



Pfeiffer has referred to this as var. variegata. Maynard's Strophia 

 fasciata (Contrib. to Sci., i, p. 133) is the Key Vaccas variety. 



VIRGINIA KEY (N. of Key Biscayne). Five specimens collected 

 by Mr. S. N. Rhoads in 1899 are nearly white. Two of them are 

 like Key West incanum in form and sculpture, 23^ and 25x10 mill. 

 The others are larger and stouter, like var. saccharimeta, though 

 hardly so strongly plicate. The larger specimens have part of the 

 first post-nepionic whorl sharply striate. They measure: 35x13; 

 26^x12^; 29^x11 mill. All of them are " crab shells," and none 

 were found living. 



Virginia Key is probably the extreme limit of northeastward dis- 

 tribution in Florida ; Rhoads thought that the Virginia Key speci- 

 mens had probably been drifted there (Nautilus, xiii, p. 45). I 

 could not find the species around Miami or opposite on the eastern 

 shore of Biscayne Bay. Binney reports it from the mainland of 

 Florida, but without definite locality. Simpson reports it- from 

 Torch Key and Pine Key, but without noting the particular forms 

 found, from which circumstance it is likely that they did not differ 

 from the Key West types. 



CUBA. 0. incanum has been recorded from Cuba on the author- 

 ity of Poey. Several lots, so labeled, are in the collection of the 

 Academy ; but no definite Cuban locality has been put on record. 



BAHAMAS. Gun Cay, one of the westernmost islets of the group. 

 Indistinguishable from Key West forms except that the last whorl 



