44 PROCEEDINGS OF THE ACADEMY OF [1890. 



NOTE ON A SOUTHERN PUPA. 

 BY H. A. PILSBRY. 



During the past year the writer has had occasion several times to 

 examine and determine specimens of a certain Pupa from various 

 localities in the South, the extreme points being Arizona and Florida. 

 It seems to him highly desirable to have a name and a recognizable de- 

 scription and figure for a form so widely distributed, and so con- 

 stantly separated by local naturalists from the already known spe- 

 cies as the following : — 

 Pupa liordeacella n. sp. (PI. I, figs, g, h, i, j, k.) 



The shell is of a long-ovoid shape, smaller and more slender than P. 

 servilis Gould, translucent, waxen-white, finely striate ; the aperture 

 is rounded, with a thin, expanded peristome. Within, there is on 

 the parietal wall, an entering fold arising near the termination of the 

 outer lip, its edge a trifle sinuous or nearly straight ; the columella 

 has a fold about in the middle. There is a tiny, deep-seated fold on 

 the base of aperture, near the columella, an entering fold within the 

 outer lip, equidistant from the above-described parietal and colu- 

 mellar folds, and a tiny denticle above it. The columellar fold is 

 not situated so high on the pillar as in P. se7"vilis. The latter half 

 of the body-whorl is flattened on the outer-lower portion, as the fig- 

 ure J. shows. There is a low wave-like ridge or ' crest' also, but 

 scarcely visible in many specimens. 



Alt. 1*8, diam. 8 mm. 



The figures were drawn with the aid of camera lucida. They 

 should be compared with Gould's excellent figures of P. servilis, in 

 Boston Journal of Natura^ History, vol. IV, plate 16, fig. 14, and 

 those of P. pellucida in Strebel's Beitrag zur Kenntniss der Fauna 

 raexikanischer Land-und Siisswasser-Conchylien, Theil iv, pi. xv, fig. 

 10. The latter are the more valuable in this connection as they are 

 not only faithful drawings on a sufficiently large scale, but are the 

 only ones drawn from Continental specimens (Vera Cruz, Mexico). 

 The measurements given by Strebel and Pfeffer are alt. 2^, diam. of 

 last whorl fully 1 mm. ; alt. of aperture, t mm. Gould's P. servilis 

 and Pfeiffer's P. pellucida were both described from Cuba. I see no 

 reason for not following W. G. Binney in considering them synony- 

 mous, pellucida having precedence. 



