CUBAN SUBFAMILY CHONDROPOMINAE TOKRE AND BARTSCH 321 



it in the mountains north of Candelaria, at Frias, La Tumba, Finca 

 Dolores, and El IMogote. 



The type, U.S.N.]\I. no. 499592, conies from Loma Pimienta, 7 miles 

 north of Candelaria. It has 4.4 %Yhorls remaining and measures: 

 Length, 14.9 mm ; greater diameter, 9.5 mm ; lesser diameter, 7.0 mm. 



CHONDROTHYRELLA (CHONDROTHYRELLA) PETRICOSA (Morelet) 



Shell elongate-ovate, thin, varying in color from flesh-color to pale 

 yellow, through pale brown to purplish brown, unicolor or spirally 

 banded ; the peristome is yellowish or brownish and rayed. Nuclear 

 whorls 2, well rounded, smooth except the last portion of the last 

 turn, which shows the beginning of the postnuclear sculpture. Post- 

 nuclear whorls well rounded, slightly shouldered at the summit, 

 marked by retractively slanting, sublamellar axial riblets, which are 

 rather closely spaced. These riblets are rendered wavy by spiral 

 threads, which slightlv thicken them at their junction v^'ith the axial 

 riblets. Suture strongly constricted. Peripliery well rounded. 

 Base moderately long, well rounded, marked by the continuation of 

 the axial riblets and spiral threads, the latter becoming a little 

 stronger toward the umbilicus. Aperture very broadly oval; peri- 

 stome double, the outer flaringly expanded, deeply notched on the 

 middle of the inner lip and reflected over the umbilicus and part 

 of the base posterior to the notch, extending broadly upon the pre- 

 ceding whorl on the parietal wall, marked by concentric laminae and 

 slightly fluted; inner peristome slightly exserted and slightly re- 

 flected. Breathing pore on the parietal wall near the posterior angle 

 of the aperture and at some little distance behind the peristome. 

 Operculum with the nucleus half way between marginal and cen- 

 tral, marked on the outside by a rather thick deposit of calcareous 

 granules. 



This race is found over the eastern end of Pinar del Rio, Cuba, 

 and the western end of Habana Province. It breaks up into several 

 subspecies. 



Of C. (C.) pefrieosa petricosa collected on stone fences near Vente, 

 Almendares, Habana Province, July 12, 1928, we have the following 

 color note : 



Animal flesh-colored, with smoky suffusion and many fine white 

 elongated spots; tentacles dull brownish orange, whitish at base; 

 foot sliort, bifid ; motion of two sides alternate. 



KEY TO THE SUBSPECIES OF CHONDROTHYRELLA (CHONDROTHYRELLA) 



PETRICOSA 



Sculpture feeble petricosa 



Sculpture not feeble. 



Shell dark brown , elisabethae 



Shell horn color anafensis 



66879—38 — —9 



