316 Annals of the Carnegie Museum. 



2. Rhytidopoma rugulosum (Pfeiffer). 



Cyclostoma rugulosum Pfeiffer, Wiegm. Archiv, Vol. I, 1839, P- 3S6- 

 Habitat. — Casas and Caballos Mountains; Punta de Colombo. 

 This species is the type of the genus Ctenopoma Shuttleworth (1856) 



preoccupied (1855). The generic name here used was substituted by 



Sykes (1901). 



2a. Rhytidopoma rugulosum clathratum Gould. 



Cyclostoma clathratum Goltld, Boston Journal Nat. Hist., Vol. IV, 1842, on 

 cover (no page). 



Reported from the Isle of Pines by Arango and authors under the 

 specific name denegatum Poey (1856). There can be no doubt of the 

 specific identity of denegatum Poey and clathratum Gould, the latter 

 name having priority. 



2b. Rhytidopoma rugulosum nodulatum (Poey). 



Cyclostoma nodulatum Poey, Memorias Hist. Nat. Cuba, Vol. I, 1852, p. 104. 



A specimen in my collection derived from Poey is marked as from 

 the Isle of Pines. I have seen no others, and believe the record needs 

 confirmation. 



3. Chondropoma dissolutum (Pfeiffer). 



Cyclostoma dissolutum Pfeiffer, Malakozoologische Blatter, Vol. I, 1854, p. 

 158. Novit. Conch., Vol. I, p. 95, PI. 26, figs. 12-16. 



Habitat. — Casas and Caballos Mountains; Punta del Colombo. 



[" Cyclostoma " semicanum Morelet. 



A species described by Morelet in Test. Novissima Ins. Cub., Pt. 2, 1851, p. 20, 

 and erroneously ascribed to the Isle of Pines. It is probably Annularia blaini 

 (Gundlach) Pfeiffer, Mai. Blatt, Vol. 10, 1862, p. 197, of the Organ Mountains of 

 Pinar del Rio, Cuba.] 



4. Chondropoma wilcoxi Henderson, subsp. 



Chondropoma wilcoxi Henderson, Nautilus, Vol. XXVI, 1912, p. 45; I. c. Vol. 

 XXVII, 1913, PI. 3, fig. I. 



Habitat. — Caripatchibey (?). Probably southern coast. 



A lot collected by Dr. Nicholas in my collection are evidently 

 referable to C. wilcoxi, although not typical. The type is from the 

 Ensenada de Cochinos in Cuba and not from the Isle of Pines where 

 the conditions of environment are identical. These shells are smaller 

 and of slightly heavier texture. 



