1919.] NATURAL SCIENCES OF PHILADELPHIA. 215 



Guppya elegantula n. sp. Pig. 4. 



The shell is narrowly perforate, pyramidal, resembling G. elegans 

 (Strebel) in form; pale cinnamon, fading at the summit. Surface 



above the periphery having a microscopic 

 sculpture of fine, close, nearly vertical 

 striae, cut by equally close spiral lines, 

 but the latter are not everywhere devel- 

 oped; the base glossy,, with engraved 

 spirals only, far, more widely spaced than 

 on the upper surface. Outlines of the 

 spire are slightly convex. Whorls quite 

 convex, the last rounded peripherally in 

 the adult stage (angular in the young). 

 Aperture semilunar, not very wide. 

 Alt. 3.2, diam. 3.3 mm.; 6| whorls. 



State of Vera Cruz, Orizaba, 500 ft. above the town (Heilprin 

 exped.). San Luis Potosi, canyon and falls below Valles (Hinkley, 

 type loc). Nuevo Leon, Diente near Monterey (S. N. Rhoads). 

 Tamaulipas, in a canyon 4 miles w^est of Victoria, at about 3000 ft. 

 (S. N. Rhoads.) 



This is the species which was formerly identified as G. elegans 

 (Strebel) by the writer. It is nearer that than to any other described 

 species of the region, but on account of the smaller size, in some 

 hundreds of specimens, the identification was not satisfactory. 

 Specimens of the real elegans have now^ turned up, found in a vial 

 labelled H. selenkai, from Mirador, one of the localities given by 

 Strebel for elegans. It is a decidedly larger shell than the present 

 species, probably confined to a warmer zone. 



Specimens from Uruapam and other places in the State of Micho- 

 acan (S. N. Rhoads, 1899), have closer spirals on the base. A single 

 immature specimen from Yautepec, Moreles (Heilprin exped.) prob- 

 ably belongs here. It was recorded by the writer as elegans. 



G. elegantula was collected at Guadalajara, Jalisco, by McConnell 

 and Crawford, 1909. It was taken in river drift at Tampico by 

 Mr. Hinkley, but may have floated there from inland. It appears 

 to be common and widely distributed. 



A closely related form having about one whorl less, and with the 

 aperture a little wider, was taken by Mr. Hinkley about old logs 

 in the banana plantation, Maya farm, Quirigua (No. 28 of his 1913 

 collection). It is more highly conic than G. pittier'i v. Marts., and 

 may perhaps be a new species between pittieri and elegantula, or a 

 subspecies of the latter. 



