CUBAN SUBFAMILY CHOXDROPOMINAE TORRE AND BARTSCIl 255 



spiral rays, which may or may not show on the face of the peristome. 

 The face of the peristome is pale yellow. Some specimens show a 

 tendency toward interrupted spiral bands on the base. 



The type, U.S.N.M. no. 468735, which comes from the :Moo-ote El 

 Qneque, is a complete specimen having 7.8 whorls and measuring: 

 Length, 29.7 mm; greater diameter, 17.8 mm; lesser diameter. 12.7 

 mm. 



CHONDROTHYRA (CHONDROTHYRA) RUTILA NEBULOSA, new subspecies 



Plate 17, Figure 10 



This subspecies, which comes from the small mogote Martin 

 Miranda in the Palmarito, Vinales, near El Queque, has the ground 

 color also orange, but this is decidedly clouded with axial streaks of 

 blackisli brown, and there is a tendency to spiral banding on the last 

 whorl. A zone of more or less confluent spots is present on the sum- 

 mit of the whorls. The peristome is pale yellow and faintly radiat- 

 ingly rayed. 



The type, U.S.N.M. no. 468736, has 4.5 whorls remaining and meas- 

 ures: Length, 28.7 mm; greater diameter, 18.4 mm; lesser diameter, 

 13.0 mm. 



The dark clouding readily distinguishes this subspecies from the 

 other. 



CHONDROTHYRA (CHONDROTHYRA) EGREGIA (Gundlach) Pfeiffer 



Plate 16, Figures 7, 9 



1856. Cyclostoma egregium (Gundlach) Pfeiffer, Malakozool. Blatter, vol. 3, 



pp. 38-39. 

 1856. Chondropoma egregium Pfehtfer, Malakozool. Blatter, vol. 3, p. 134. 

 1920. Chondrothyra (Clwndrothyra) egregium Henderson and Bartsch, Proc. 



U. S. Nat. Mus., vol. 58, p. 63. 



Shell broadly ovate-conic, with the apex and the broadly expanded 

 peristome white to pale yellow, the latter usually marked with radial 

 streaks of brown on i\\Q outside. The rest of the shell may be orange 

 or blackish brown; shells of both of these colors are present in the 

 same colony. The shells may or may not be spirally banded. Nuclear 

 whorls almost 2, rather small, well rounded, smooth except for micro- 

 scopic granulations. The postnuclear whorls are somewhat inflated, 

 well rounded. The first postnuclear whorl shows the beginning of 

 the spiral threads which increase in number and strength as the shell 

 advances in growth. In addition to these spiral threads, the whorls 

 are marked by retractively curved axial threads, which are finer 

 than the spiral and render the latter minutely granulose at their 

 junction. The granuloseness becomes decidedly reduced on the last 



