CUBAN SUBFAMILY CHONDROPOMIXAE — TORRE AND BARTSCH 197 

 KEY TO THE SPECIES OF SUBGENUS CHONDROPOMETES 



Peristome broadly expanded , — latilabre 



Peristome not broadly expanded. 



Peristome only moderately expanded torrei 



Peristome not moderately expanded. 



Peristome only very slightly expanded vignalense 



CHONDROPOMETES (CHONDROPOMETES) LATILABRE (Oibigny) 



Plate 8, Fig. 1 



1845. CycJostoiiia latikihri.'i Oebigny, in Sagra's Ilistoire physique, politique et 

 naturelle de I' ile de Cuba, vol. 1, pp. 255-2;jG, pi. 21, fig. 12. 



Shell turbinate, flesh-colored, pale horn colored, pale brown, or 

 sometimes rather dark pur[)lish brown; in the dark phase the color 

 becomes intensified on the last whorl behind the peristome. Nuclear 

 whorls 2, forming a somewhat truncated apex, the early portions 

 minutely microscopically granulose, the last portion of the last turn 

 with indications of closely approximated feeble axial threads. Post- 

 nuclear whorls inflated, strongly rounded, marked by slender 

 sublamellar, decidedly retractively curved axial riblets; those on the 

 last Avhorl being a little more distantly spaced than the rest. In 

 addition to this, the early whorls show slender spiral threads, which 

 become enfeebled on the later turns but are present even on the last 

 portion of the last turn. The junction of these spiral threads with 

 the axial riblets renders these somewhat sinuous and somewhat 

 thickened at their junction. Periphery of the last whorl well 

 rounded. Base strongly inflated, well rounded, openly umbilicated, 

 marked by the continuations of the axial riblets and rather feeble 

 spiral threads. This stronger spiral sculpture extends to the outer 

 limit of the umbilicus. The last whorl is solute for about one-fifteenth 

 of a turn. Aperture somewhat irregularly broadly ovate; peristome 

 double, the inner slightly expanded and thickened, the outer very 

 broadly expanded and reflected, not all in one plane, but somewhat 

 wavy. The expanded portion is almost of the same width all the 

 way around. It is adnate to the preceding turn on the parietal wall, 

 while the reflected portion projects over a little more than half the 

 umbilicus on the columellar border. The peristome is yellowish 

 white, while the inside of the aperture is pale brown. Operculum 

 paucispiral with subcentral nucleus, covered with a thin granular 

 deposit excepting a broad border at the edge. 



The specimens described and figured, U.S.N.M. no- 354923, are 

 part of a lot of G2 that we collected on the Tomas Barrera Expedition 

 in 1914, when we found this species to extend from San Juan de 

 Sagua at the western end of Pan de Guajaibon to the middle of its 

 northern slope. 



