OF UJflO AXD MARGARITAS A. 



103 



prunoides. Lea. - ? 



psammoicus. D'Orb. Bio Parana. 

 ravistellus. Morel. Lake Yzabal, Guatemala, 

 rhombeus. Wag. Bio Solimoens. Brazil, 

 rhuacoicus. D'Orb. Uruguay, 

 rotundus. Wag. Eio San Francisco, 

 rudus. Lea. Eio de la Plata. 



rufofuscus. Lea. ? 



solidulus. Ph Hi. Chili, 

 suavidicus. Lea. Eiver Amazon. 

 trifidus. Lea. Buenos Ayres. 

 Uruguayensis. Lea. Uruguay river. 

 variabilis. Lea. Brazil. 

 Veras-Pacis. Trist. Guatemala. 

 Voldivianus. Phili. Chili. 

 Wheatleyanus. Lea. Eiver Amazon. 

 Wymani. Lea. Uruguay river. 



NEW HOLLAND, &c. 



Auklandicus. Fide Woodward. 



Australis. Lam. ? 



Balonnensis. Con. Balonne river. 



cucumoides. Lea. Hunter's river. 



cultelliforrnis. Con. Bogan river. 



depressus. Lam. ■ ? 



Evansi. Ad. & An. Murray river, So. Aus- 

 tralia. 



Mortonicus. Reeve. Australia. 



niultidentatus. Phili. ■? 



Napeanensis. Con. Napean river. 



Novas Hollandia?. Gray. Macquarrie river. 



profugus. Gould. Hunter's river. 



Stuarti. Ad. & An. Port Jackson. 



Wilsonii. Lea. Eastern branch of Isaac's 

 Plain, New South Wales. 



? Con. Bogan river. 



HABITAT UNKNOWN. 



angustus. Lam. 

 emarginatus. Lea. 

 Liebmanni. Phili. 

 melleus. Lea. 

 navigilioformis. Lea. 

 Prusii. Bourg. 

 Smithii. Gray. 

 truncatus. Swain. 



IV. SUBGENUS 3IARGARITAXA. 



EUROPE. 



margaritifera. Lea. Northern rivers. 



NORTH AMERICA. 



Alabamensis. Lea. Talladega creek, Ala. 

 arcula. Lea. Altamaha river, Ga. 

 calceola. Lea. Ohio river, 

 complanata. Lea. Ohio river. 

 Ohio river. 



Lea. Gilmer county, Ga. 

 Stone's river, Tenn. 

 Ohio river. 

 Ohio river. 

 Columbus, Ga. 



confragosa. Say. 



Connesaugaensis. 



Curreyana. Lea. 



dehiscens. Lea. 



deltoidea. Lea. 



Elliottii. Lea. 



elliptica. Lea. Tombigbee river, Ga. 



Etowaensis. Con. Etowah river, Ga. 



fabula. Lea. Cumberland river, Tenn. 



Georgiana. Lea. Etowah, Ga. 



Gesnerii. Lea. Uphaupee creek, Ala. 



Hildrethiana. Lea. Ohio river. 



Holstonia. Lea. Holston river, Tenn. 



margaritifera. Lin. Pennsylvania, Mass., &c. 



marginata. Say. Schuylkill river, Pa. 



minor. Lea. Tennessee. 



quadrata. Lea. East Tennessee. 



radiata. Lea. South Alabama. 



Eaveneliana. Lea. French, Broad river, N. C. 



rugosa. Bar. Ohio river. 



Spillmanii. Lea. Tombigbee river, Missi. 



Tombigbeensis. Lea. Tombigbee river, Missi. 



triangulata. Lea. Georgia and So. Carolina. 



undulata. Say. Schuylkill river, Pa. 



AFRICA. 



Tripolitana. 

 Pfeifferiana. 

 Yisrnouana. 



Fer. 



Bern. Gabon. 



Bern. Gabon. 



SOUTH AMERICA. 



incurva. Fer. 



