62 GASTROCOPTA, NORTH AMERICA, WEST INDIES. 



mellar side. The lip is not much thickened, less than in 

 typical marginalba. 



Length 2.45, diam. above aperture 1 mm. 



Length 2, diam. above aperture 0.96 mm. 



Pfeiffer's original and later descriptions follow. 



Pupa marginalba Pf r. PL 11, fig. 8. ' ' Shell ovate- turrite, 

 corneous, umbilicate ; whorls 5, convex ; lip rather thick, sub- 

 expanded, white; aperture four-toothed. Length 1%, diam. 

 y 2 lines. Two small teeth in the outer lip, a third, larger, in 

 the columella, and the fourth, largest, on the penult whorl 

 near the insertion of the lip. A single specimen." Cuba 

 (P/r., 1840). 



"Shell shortly rimate, subperf orate, oblong-ovate, thin, 

 glossy, corneous; spire subturrite, the apex rather obtuse; 

 5% convex whorls. Aperture subrotund, four-toothed: one 

 tooth on the parietal wall, one on the columella, two callous 

 teeth in the lower part of the palate ; peristome white, shortly 

 expanded, the margins joined by a thin callous. Length 2%, 

 diam. 1% mm., aperture % mm. long" (P/r., 1848). 



Pfeiffer's original example was probably from Matanzas 

 province, where he collected. Kiister states that the neck is 

 somewhat flattened, with a callous (crest) running parallel 

 to the lip ; the peristome has a pretty strong white lip. Like 

 Pfeiffer, he describes only four teeth. PL 11, fig. 8, is copied 

 from his plate. 



18. GASTROCOPTA PROCERA (Gould). PL 12, figs. 1 to 5. 



The shell is shortly rimate, cylindric, with convexly conic, 

 obtuse summit; cinnamon to sayal-brown, paler at the sum- 

 mit, somewhat glossy, lightly, irregularly striate. Whorls 

 5%, rather strongly convex, the last one flattened in the 

 region of the lower palatal plica, and slightly impressed over 

 the basal plica; having a low crest (fig. 4) close behind the 

 outer lip (variable in prominence). The aperture has five 

 teeth. The angulo-parietal lamella is sinuous, showing a dis- 

 tinct spur on the right side, in a front view; in basal view 

 (pi. 12, fig. 5) this spur is seen to be the inner end of the 

 angular lamella, while the parietal lamella forms a very in- 



