CUBAN SUBFAMILY CHONDROPOMINAE TORRE AND BARTSCH 299 



Length, 27.2 mm; greater diameter, 17.0 mm; lesser diameter, 14.8 

 mm. 



CHONDROTHYRETES CERINA SUBCERINA, new subspecies 



Plate 23, Figure 8 



This race extends through the Ensenada Pan de Azucar, the large 

 embayment in the western end of the Organ Mountains. It is the 

 most strongly sculptured subspecies known, recalling weakly marked 

 C. reticulata^ but at once distinguished from this by the character 

 of the peristome. 



The type, U.S.N.M. no. 367875, has 4.5 whorls remaining and 

 measures: Length, 27.0 mm; greater diameter, 16.9 mm; lesser diam- 

 eter, 14.0 mm. 



CHONDROTHYRETES BARBOURI, new species 



Shell large and stout, varying in color from flesh-color through 

 yellow and orange to brown; unicolor or marked with spiral lines 

 of brown; peristome white, sometimes partly rayed on the back. 

 Nuclear whorls about 2, well rounded, marked only by incremental 

 lines. Postnuclear whorls somewhat inflated, well rounded, marked 

 by rather distantly spaced spiral threads and on the early post- 

 nuclear whorls by axial threads of almost the same strength, which 

 rapidly decrease in strength and become obsolete as the shell in- 

 creases its whorls. Suture well impressed, not denticulated. Ap- 

 ertuiie broadly ovate, slightly angulated at the posterior angle; 

 peristome double, the inner, which is slightly exserted, extends a 

 little above the broadly expanded, somewhat radially fluted and 

 concentrically feebly laminated outer, which has the inner lip cut 

 in the middle and the posterior half reflected over the umbilicus, 

 which it completely covers. 



The species ranges through the Organ Mountains about Luis Lazo 

 and eastward through Sumidero to Cabezas and some of the mogotes 

 adjacent to this. 



KEY TO THE SUBSPECIES OF CHONDROTHYRETES BARBOURI 



Shell predominantly brown barbouri 



Shell predominantly pale itineraria 



CHONDROTHYRETES BARBOURI BARBOURI, new subspecies 



Plate 21, Figube 5 



This is the large brown race that occupies the high mountains 

 of the Sierra San Carlos and the Sierra Acostas all around Luis 

 Lazo and northeastward through the Sierra Sumidero. 



G. harhouri harhouri is distinguished from the other subspecies by 

 being larger and heavier and in having the brown color predomi- 



