290 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 85 



CHONDROTHYRETES RETICULATA PETRICOLA, new snbspecies 



Plate 20, Figxjke 9 



This subspecies ranges through the Sierra Chorrera and the Mogotes 

 Marmol of the Laguna Piedras. The race is characterized bj' its thin 

 shell, tawny ground color, and the fine interrupted spiral lines, which 

 are arranged in axial series, thus giving to the shell a decidedly 

 clouded effect. The area immediately behind the peristome forms 

 a dark axial zone. 



The type, U.S.N.M. no. 468906, a complete specimen from the Sierra 

 Chorrera, has 7.1 whorls remaining and measures: Length, 28.9 mm; 

 greater diameter, 17.2 mm ; lesser diameter, 13.3 mm. 



CHONDROTHYRETES RETICULATA FRATERNA, new snbspecies 



Plate 20, Figure 11 



This race, which comes from El Cuajani, Mogotes dos Hermanos, 

 El Queque, is large and thin shelled and varies in color from white 

 through orange and reddish to brown. It is not clouded. There is 

 a slender, white, finely denticulated line at the summit not bordered 

 with a dark line. The outer peristome is free of rays on both sides. 



The type, U.S.N.M. no. 492885, comes from El Queque. It has 7.0 

 whorls and measures : Length, 28.6 mm ; greater diameter, 17.5 mm ; 

 lesser diameter, 13.2 mm. 



CHONDROTHYRETES RETICULATA RETICULATA, new subspecies 



Plate 21, Figuee 6 



The typical race ranges through the limestone bluffs of Banos 

 San Vicente, the Ensenada de los Banos, and the Puerta de la Ancon. 

 This race is also very variable in color but dark as compared with 

 the other large races, brown being the prevailing coloration. The 

 finely denticulated white line at the summit is very marked in this! 

 race, and interrupted spiral bands are fairly regularly arranged in 

 axial series, giving this a more or less varicially streaked effect. The 

 peristome is not raj^ed. 



The type, U.S.N.M. no. 492910, comes from Banos San Vicente. 

 It has 6.0 whorls remaining and measures : Length, 27.5 mm ; greater 

 diameter, 16.4 mm ; lesser diameter, 12.6 mm. 



CHONDROTHYRETES RETICULATA VERSICOLOR, new subspecies 



Plate 21. Figure 4 



This subspecies occupies the north slope of Pan de Azucar. It is 

 a dark race, frequently with a light base and a broad median spiral 

 band. The whorls are not as strongly inflated as in some of the 



