l8 TRAKSACTIONS OF THE WAGNER FREE 



Charlotte Harbor and thence to Texas, though not unlikely, remains to be 

 demonstrated. It is, however, abundant in Post-Pliocene deposits as far north 

 as Tampa Bay, It was found at North Creek by Mr. Willcox. I have received 

 it from the Pliocene beds of the Myakka River and Shell Creek, and it is 

 especially abundant with Vetms {Chione) cancellata in the upper layers of the 

 Caloosahatchie Pliocene, which were deposited in shallower water than the 

 lower layers, in which it is also found, but more sparingly. I have not been 

 able to determine the presence of the allied B. occidentalis Adams in a fossil 

 state. The specimens of B. striata frequently retain well-marked traces of 

 their original color pattern, which is the same as in recent specimens. B. 

 pauperciUa Sby. and B. Vendryesiana of the Miocene of Jamaica and Haiti 

 are stated by Dr. Guppy to be synonymous with varieties of this species. 



Bulla petrosa Conrad. 



Bulla peirosa Conrad, Am. Journ. Sci., 2d Ser. ii. p. 399, with figure, 1846. (Tampa silex- 



bed.) 

 Not Bullina petrosa Conrad, /. c, v. p. 433, 1848^ Cylichna sp.fide Meek. (Miocene, As- 

 toria, Oregon.) 

 Tampa silex-beds at Ballast Pt. ; Conrad, Dall. 



This is a genuine Biitla, like B. solida, but of smaller size, the apex being 

 perforate. My specimens are too imperfect, or imbedded in solid silica, to do 

 more than confirm its occurrence here. 



Genus HAMINEA Leach. 



Haminea virescens Sowerby. 



Bulla virescens Sowerby, Genera, No. XXXIX., fig. 2. 



Haminea virescens A. Adams, Thes. Conch., II. p. 579, pi. 124, fig. 83, 1850. 



Haminea cymbiformis Cpr., Mazatlan Shells, p. 174, 1857. 



Caloosahatchie beds. Recent on the Pacific coast, and widely distributed 

 over the warm seas. 



The specimens have been compared with typical specimens of H, virescens 

 and agree exactly. This is one of the cases where, so far as known, a species 

 formerly inhabiting both coasts of North America has become extinct since 

 Pliocene times on one side of the continent while persisting on the other. It 

 is quite possible, however, that a more thorough exploration of the Antillean 

 region would show the species still living there. 



Family APLYSIIDyE, 



Genus DOLABELLA Lamarck. 



Dolabella Aldrichi n. s. 



Plate 10, fig. 7 a. 



Shell large, thick, subspiral, of about (when perfect) one and a half whorls ; 



apex showing signs of the existence of a wing-like appendage, as in other 



species of the genus ; exterior smooth or slightly transversely waved, with a 



