CUBAN SUBFAMILY CHONDROPOMINAE TORRE AND BARTSCH 283 



It breaks up through this range into a series of subspecies, eight 

 of which we are here characterizing. 



Distribution of the subspecies of Chondrothyretes tenehrata is 

 shown in fiaure 93. 



FiGDRE 93. — Distribution of tlie subspecies of Chondtothyrctcs tenchrata: (1) hrcvior; 

 (2) alholabris; (3) variaUlis; (4) scripta; (5) tenebrata; (6) montalverisis ; (7) a;/uen- 

 •sfs; (8) can-alctensis. 



KEY TO THE SUBSPECIES OF CHONDROTHYRETES TENEBRATA 



Expanded lip strongly rayed. 



Early whorls dark brown tenebrata 



Early whorls not dark brown. 

 Shell clouded and marbled. 



Dark rays of outer lip exceeding in extent the light 



intervals canaletensis 



Dark rays of outer lip equaling in extent the light 



intervals scripta 



Dark rays of outer lip less in extent than the light 



intervals variabilis 



Shell not clouded and marbled. 



Length of decollated shell more than 23 mm ayuensis 



Length of decollated shell less than 21 mm brevior 



Expanded lip not strongly rayed. 

 Kays absent or obsolete. 



Shell ranging from flesh-color to palp reddish brown albolabris 



Shell ranging from orange to reddish brown montalvensis 



CHONDROTHYRETES TENEBRATA TENEBRATA, new subspecies 

 Plate 19, Figure 1 



Shell varying from dark orange brown to dark brown, banded to 

 various degrees. Tlie early whorls dark, the later a little paler; the 



