330 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



sists of slender threads on the early whorls which become decidedly 

 enfeebled on the later turns, changing here to mere incremental lines. 

 The spiral sculpture consists of threads, also not strongly developed. 

 The junctions of the axial riblets and spiral threads do not form 

 nodules even on the early turns. Suture narrowly channeled. 

 Peripliery well rounded. Base moderately long, somewhat inflated, 

 well rounded, openly moderately broadly umbilicated, marked like 

 the upper portion of the last whorl by incremental lines and spiral 

 threads, those on the umbilical wall equaling those on the outside in 

 strength. The last whorl is usually solute for a slight fraction of 

 a turn. Aperture broadly ovate; peristome double, the outer and 

 inner coextensive on the outer lip, slightly separated on the parietal 

 wall and the basal lip and very strongly so on the inner lip where 

 the outer peristome forms a broadly expanded shelflike element, 

 and the inner projects materially above it at a little less acute angle. 

 Operculum thin, corneous, paucispiral, with the nucleus halfway 

 between submarginal and subcentral, the outside covered with a 

 thin granular deposit. 



Of this species Gundlach says " : "Animal pale, the interior of the 

 head and neck somewhat rose-colored, which is also the color of the 

 tentacles whose tip is clay yellow. The body is marked above by 

 whitish spots and darkish dots which form a curved band upon the 

 head below the tentacles and still other dots upon the head become 

 concentrated on tlie edge and form a V-shaped figure with the angle 

 pointing forward. The upper part of the tentacles is rendered 

 grey by a countless number of blackish atoms." 



Poey in dedicating this species differentiates it from C. {C.) 

 pictum, but he does not mention a type locality. Pfeiffer figures a 

 specimen that plainly shows a member of the complex we now recog- 

 nize as this subspecies. It probably comes from Mangaro, which 

 we know was one of his collecting grounds. 



This is a lowland species, found in the stone fences, under rocks 

 and logs. It also ascends the hills in the region about Habana where 

 it replaces G. (0.) pictum. 



This species was first collected by Poey at La Loma Tetas de 

 Managua. Pfeiffer later listed it from the Loma Camoa from which 

 he had received specimens collected by Gundlach, and this has been 

 held by some to be the type locality. The typical form, however, 

 must be restricted to Poey's collecting ground, as stated above. 



The characteristics of pfeifferianum are a denticulated suture, 

 double lip, usually dark inner lip, and usually a dark tip. 



w Malakozool. Blatter, vol. 3, pp. 132-133. 



