782 PROCEEDINGS OF THE ACADEMY OF [DeC, 



Helicina succincta Martens. 



Texolo, V. C. 

 Helicina orbiculata tropica Jan. 



Monterey, State of Nuevo Leon. Similar to Texan examples. 

 Helicina fragilis Morel. 



Antigua, State of Vera Cruz. 

 Helicina lirata Pfr. 



Antigua, V. C. 

 Helicina sowerbyana Pfr. PI. LIV, figs. 7, 8. 



Caiion 4 miles west of Victoria, Tamaulipas. Twelve specimens 

 of this fine species, measuring 18 to 21 mm. diam., were taken, the 

 first since the original lot many years ago. I am much inclined to 

 doubt the locality "Guatemala" of the Cumingian type specimen, as 

 the snails of that country are mainly of different species from those of 

 Tamaulipas, and no specimens of this large and conspicuous species 

 have been found in the intermediate territory, part of which is the 

 most fully explored portion of Mexico. H. sowerbyana probably does 

 not range south as far as the State of Vera Cruz. The rather con- 

 spicuous spiral sculpture does not show in the photographic figures. 

 Helicina zephyrina Duel. 



Texolo, at the falls, State of Vera Cruz. 

 Helicina zephyrina var. dientensis n. v. 



Similar to zephyrina, except that the body-whorl is more depressed 

 and the base less convex. 



Alt. 14.5, diam. 11 mm. 



Alt. 12, diam. 9.5 mm. 



Alt. 14.3, diam. 11.4 mm. 



Diente, near Monterey, N. L. Types No. 77,238, A. N. S. P. 



Trochatella simpsoni Ancey. PL XLIX, fig. 4. 

 Annales de Malacologie, II, p. 253. 



One of the original specimens, from the series of Utilla shells pre- 

 sented by Mr. C. T. Simpson, is figured. This is the only Trochatella 

 known from the mainland of Mexico or Central America or islands 

 adjacent thereto. It was collected on Utilla Island, off the north 

 coast of Honduras, by Mr. Simpson. The shell figured measures 2.6 

 mm. diam. and alt. 



Schasicheila fragilis Pilsbry. PI. LI, figs. 7, 7a. 

 Proc. Acad. Nat. Sci. Phila., 1899, p. 391. 



Diente, near Monterey, State of Nuevo Leon. Types No. 



77,237, 



A. N. S. P. 



