CUBAN SUBFAMILY CHONDROPOMIXAE TORRE AND BARTSCH 235 



nodulose at the junction of the axial riblets and spiral threads. All 

 sculpture decidedly reduced on the last whorl. Aperture broadly 

 ovate; peristome double, the outer broadly expanded, less so on the 

 parietal wall, somewhat fluted, marked by feeble concentric threads; 

 the inner narrowly expanded, reflected over and adnate to the outer. 

 Operculum thin, corneus, covered, with a fine granular deposit. 



Type: Eendersonina {Eendersonida) discolorans (Wright) 

 Pfeiffer. 



HENDERSONINA (HENDERSONIDA) DISCOLORANS (Wright) Pfeiffer 



Shell of medium size, broadly ovate, yellow or of various shades 

 of rose color, sometimes spirally banded; peristome white; oper- 

 culum horn-color or with rosy flush. Nuclear whorls a little more 

 than 2, well rounded, very minutely granulose, the last portion of 

 the last turn with a few feeble axial threads. Postnuclear whorls 

 inflated, well rounded, marked by weak axial and spiral threads, 

 which on the early whorls form slightly cusplike tubercles at their 

 junction. Suture deeply impressed, marked by irregularly developed 

 and distributed tufts on the summits of the whorls. Periphery and 

 base of the last whorl inflated, strongly rounded, the latter openly 

 umbilicated and marked by feeble axial and spiral threads. The last 

 whorl may or may not be solute for a fraction of a turn. 



The known range of this species extends through the Laguna 

 Piedras northward to the Sierra San Andres and east to Mogote 

 Fonte. 



We are recognizing three subspecies, which the adjoining key will 

 help to identify: 



Distribution of the subspecies of E. (E.) discolorans is shown in 

 figure 81. 



KEY TO THE SUBSPECIES OF HENDERSONINA (HENDERSONIDA) DISCOLORANS 



Shell rose-color. 



Base not darker than the rest of the last whorl discolorans 



Base darker than the rest of the last whorl bicolor 



Shell yellow decolor 



HENDERSONINA (HENDERSONIDA) DISCOLORANS DISCOLORANS (Wright) Pfeiffer 



Plate 13, Figure 9 



1863. Chondropoma discolorans (Wright) Pfeiffer, Malakozool. BliUter, vol. 

 10, p. 189. 



This subspecies, whose base is colored like the rest of the last 

 whorl, comes from the mogotes scattered through the Laguna Piedras 

 from Puertecitas north to Mogote La Jagua de San Antonio. While 

 it shows considerable diversity through this range, the variables are 



