1898.] NATURAL SCIENCES OF PHILADELPHIA. 275 



Species of Jamaica. 



U. pupceformis (C. B. Ad.). 

 U. striata (Chitty). 



U. augustce (C. B. Ad.). 

 U. hollandi (C. B. Ad.). 

 U. hydrophana (Chitty). 



Section Spirostemma Pils. & Van. 



Type U. rubra (C. B. Ad.), PI. XVIII, fig. 12. The species are 

 all Jamaican. 



U. dunkeriana (Pfr.). 

 U. montana (C. B. Ad.). 

 U. princeps (C. B. Ad.). 



U.pusilla (C.B.Ad.). 



U. rubra (C. B. Ad.). 



U. similis (C. B. Ad.). 



U. tenella (C. B. Ad.). 



U. tenera (C.B.Ad.). 



Subgenus Arangia Pils. & Van. 



Type C. sowerbiana Pfr., PI. XVIII, fig. 20. Subgeneric name 

 in memory of the Cuban naturalist, Rafeal Arango. 

 U. sowerbiana Pfr., Cuba. U. monticola Weinl. Gonave I. 



Subgenus Idiostemma Pils. & Van. 



Type C. uncata Gundl., PI. XVII, fig. 10. 



A Cuban group, containing some of the most peculiar species of 

 the genus. There is a series of species leading by gradual stages 

 from the axial pairs of hooks of the typical forms to the oblique 

 nodes or ribs of U. lateralis, etc. 



U. uncata (Gundl.). 



U.perlata (Gundl.) [C F.,P.V.] 



U. laevigata (Gundl.). 



U. intusmalleata (Gundl.). 



U. geminata (Pfr.). 

 U.fastigata (Gundl.). 

 U. lineata (Gundl.). 

 U. lateralis (Paz.) [P V.]. 



Section Maceo Pils. & Van. 



Radula with the teeth very rapidly decreasing, the third decidedly 

 smaller than second, formula about 8.1.8. Subgeneric name in 

 honor of a Cuban patriot. 



U. interrupta (Gundl.) [P V.], Cuba. PL XVII, fig. 7. 



Subgenus Gongylostoma Albers. 

 Section Pycnoptychia Pils. & Van. 



Type U. humboldtiana (Pfr.), PI. XVIII, fig. 14. Species all 

 Cuban. 



U. humboldtiana (Pfr.) [B.]. 

 U. oviediana (D. Orb.). 

 U. scceva (Gundl.) [C P.]. 



U. shidtleivorthiana (Poey). 



U. striatella (Wright). 



U. trilamellata (Pfr.). 



U. vignalensis (Wright) [C F]. 



