80 THE NAUTILUS. 



makes the sweeping assertion that " it is never found associated with 

 the typical." 



Such a statement is a very strong one, and would indicate either 

 that the writer was thoroughly familiar with every locality in Avhich 

 the shell was found, or that others had searched over its entire area 

 of distribution, and that all the facts regarding it were known. 

 Such an amount of knowledge is scarcely possessed concerning any 

 raollusk I know of ■ It is hardly safe to say with certainty that any 

 shell of the later Tertiaries is extinct, that a species is never found 

 outside of a given locality, or only under certain conditions, or that 

 one form may not connect with another, because the army of lynx- 

 eyed collectors at work now are creating continual surprises in such 

 matters, bringing the dead to life and finding forms in just the places 

 and under just the circumstances that other persons have said they 

 could not. 



While living at Braidentown, Florida, I found Bulimulus Dor- 

 mani quite abundant, living and dead, in heavy hammock lands 

 north of the Manatee River, and with the typical form, on the very 

 same trees, I found quite a number of specimens without a vestige 

 of color ! The ground of most of these shells was a lovely pale por- 

 celain, the spots were usually reddish brown, sometimes forming un- 

 interrupted bands somewhat clouded, or more or less distinct ; and 

 between these and the unicolored shells, there was almost every 

 variation. Some of the specimens were a uniform horn color, others 

 a waxen or porcelain tint. There was also quite a range of varia- 

 tion in size and solidity ; some shells measuring one and a fourth 

 inches in length, others that I believed to be adult were not over 

 three fourths of an inch long ; some were quite solid for so frail a 

 species, and others so fragile that they could be blown to fragments 

 with the breath, and it was next to impos-iible to collect or handle 

 the latter. Many of these were quite inflated, others attenuated, 

 and I am inclined to believe that B. marieliiiiis s only a dwarf, 

 elongated form of this same shell. 



In the collection of the U. S. Nat. Museum, there are a couple of 

 shells (No. 29612) collected by W. W. Calkins, with only Florida 

 given as a locality, and labelled Bulimulus Floridanus Pfr. These 

 agree quite well with the figures of that species (448) in Binney's 

 Manual of North American Land Shells, p. 407. The texture is 

 more solid than B. Dormani or Marielimis as I have seen them, the 

 whorls are somewhat convex, the last sub-angulated below the mid- 



