CUBAN SUBFAMILY CHONDROPOMINAE TORRE AND BARTSCH 275 



San Diego and apparently in the range of typical G. shuttleworthi 

 shuttJeworthi. We say apparently becanse it is possible that typical 

 shuttleworthi may not be occupying exactly the same habitat, but 

 at all events we have here a condition where two subspecies appear 

 to occupy the same range, which is, to say the least, unusual. There 

 is a possibility that when anatomically examined the strongly lat- 

 ticed group may prove a distinct species from G. shuttleioorthi,, in 

 which the last whorl is not latticed. We are not deciding this ques- 

 tion here, but merely reporting conditions. 



This race is horn-colored with interrupted irregular spots, dots, 

 and blotches of pale brown. The last whorl is a little less swollen 

 than in the two preceding races. 



Tlie type, U.S.N.M. no 468895, which comes from the Mogote 

 de la Finca, is a complete specimen, having 7.0 whorls. It 

 measures : Length, 21.0 mm ; greater diameter, 13.0 mm ; lesser diam- 

 eter, 9.2 mm. 



CHONDROTHYRETES IMPRESSA, new species 



Shell varying from small to medium sized, thin, pale yellow or 

 flesh-color, marked with interrupted spiral bands of brown on both 

 spire and base. Peristome faintly yellow, unicolor or radiately 

 rayed. Nuclear whorls about 2, inflated, well rounded, smooth ex- 

 cept for microscopic granulations and the beginning of the spiral 

 threads on the last part of the last whorl. Postnuclear whorls also 

 inflated and strongly rounded, feebly tufted at the summit, covered 

 by numerous retractively slanting axial riblets and equally strong 

 spiral threads, which form small nodules at their junction. Periph- 

 ery and base inflated and strongly rounded with both the axial and 

 spiral sculpture a little more strongly developed in the umbilical re- 

 gion than on the spire. The base is rather widely umbilicate, but 

 the umbilicus is concealed to a varying degree by the strongly re- 

 flected outer peristome of the inner lip. Aperture broadly ovate. 

 Peristome double, the outer broadly expanded and reflected, usual- 

 ly of double the width on the inner lip, posterior to the fold, as on 

 the rest of the peristome. The outer peristome is usually radially 

 fluted and concentrically laminated. The inner peristome is some- 

 what exserted and slightly reflected. Operculum thin, corneous, cov- 

 ered by a rather heavy, somewhat wavy, granular, calcareous deposit. 



The animal of C. impressa hyans is smoke-gray, a little paler on 

 the sides near the foot, as well as the sole of the foot and tip of the 

 snout. Tentacles dull orange, with the expanded tip a little sooty 

 on the side. There is a pinkish coloration shining through the body 

 of the animal behind the tentacles. 



The animal of G. impressa ornata is quite uniformly dark smoky 

 gray. Tentacles orange with sooty tips. Sole medially cleft; mo- 



