44 Umo. 



U. triangularis Barnes. 

 U. formosus Lea. 

 Orflionymus ytg^asisiz. 



538 2 cylindricus Say. Fl. Ohio. 



U. navilbrmis Lam. 

 Tritogfeiiia Ag. 



539 1 verrucosus Raf. — 



U. tuberculatus Barnes. 

 U. pustulata Sws. Treat. p. 271. 

 ^uadrula Raf. (Theliderma Sw.) 



