CUBAN ANNULARIIDAE TORRE AND BAHTSCH 157 



RHYTIDOPOMA WRIGHTIANUM WRIGHTIANUM ([Gundlach] Arango) 



Plate 11, Figure 1 



1881. Ctenopoma wrightianum (Gundlach) Arango, Proc. Acad. Nat. Sci. Phila- 

 delphia, p. 16. 



Typical wrightianum was described from La Jaula, Pinar del Rio 

 Province. We have seen it also from Cape Caj6n and Cape San 

 Antonio, and Vaile de San Juan, Guanacabibes, Pinar del Rio Province. 

 Its broadly expanded peristome will readily distinguish it from the 

 other two races. 



The specimen figured, U.S.N.M. No. 11045, a cotype, was collected 

 by Wright at La Jaula. It has 85 axial ribs on the first of the remain- 

 ing turns and 86 on the last whorl; it has 3.8 whorls remaining and 

 measures: Length, 10.7 mm.; greater diameter, 5.6 mm.; lesser 

 diameter, 4.8 mm. 



RHYTIDOPOMA WRIGHTIANUM OTTONIS. new subspecies 



Plate 11, Figure 5 



This subspecies comes from the general region of Cayajabos, Pinar 

 del Rio Province. We have representatives from the type locality, 

 Mogote la Tumba and Charco Azul. Tliis subspecies is distin- 

 guished readily from typical R. wrightianum wrightianum by its much 

 narrower outer peristome, in which respect it stands halfway between 

 the typical subspecies and R. wrightianum cabrasense. 



The type, U.S.N.M. No. 493414, was collected by Bartsch on 

 Mogote la Tumba. It has 68 axial ribs on the first of the remaining 

 turns and 92 on the last. It has 3.4 whorls remaining and measures: 

 Length, 8.1 mm.; greater diameter, 5.0 mm.; lesser diameter, 4.2 mm. 



RHYTIDOPOMA WRIGHTIANUM CABRASENSE, new subspecies 



Plate 11, Figure 4 



This subspecies comes from the mogotes that occur around Kilo- 

 meter 14 on the highway leading from Pinar del Rio to Luis Lazo, 

 Pinar del Rio Province. It is readily distinguished from the other 

 two subspecies by its extremely narrow outer peristome. 



The type, U.S.N.M. No. 355609, comes from the Mogote del Cero 

 de Cabras. On the first of the remaining turns it has 84 axial ribs, 

 114 on the second and 120 on the last. It has a Uttle more than 4 

 whorls remaining and measures: Length, 8.9 mm.; greater diameter, 

 5.0 mm.; lesser diameter, 4.4 mm. 



RHYTIDOPOMA PINENSE. new species 



Shell elongate-ovate, thin, flesh colored. Nuclear whorls 2, small, 

 inflated, well rounded, microscopically granulose. Postnuclear 

 whorls slightly inflated, rather strongly rounded and marked 



