CATALOGUE. 

 II. 



ABBREVIATIONS. 



Genera : Ala., Alasmidonta. An., Anodonta. Ano., Anodontoides. 

 Arc, Arcidens. C, Cyprogenia. D., Dromus. Gla., Glabaris. Gle., 

 G!ebula. Gon., Gonidea. H., Hemilastena. Lam,, Lampsilis. Las., Las- 

 tena. Mar., Margaritina. Med., Medionidus. Mic, Micromya. Myc, 

 Mycetopo-da. N., Nephronaias. Obli., Obliquaria. Obo., Obovaria. Peg., 

 ' Pegias. Pty., Ptychobranchus. Q., Quadrula. St., Strophitus. Syni., 

 Symphynota. Trit., Tritogonia. Trim., Truncilla. U., Unio. 



Drainage systems, etc. : C. A., Central America. E. G., East Guif 

 states. Mex., Mexico. Miss., Mississippi. N. At., North Atlantic states. 

 O.,- Ohio. Pac, Pacific -Coast. St. L., St. Lawrence. S. At., South 

 Atlantic states. Tenn., Tenessee. W. G., West Gulf states' 



A number before a species indicates the group to which it belongs as 

 shown in the systematic arrangement. Synonyms are in italics. 



apicinus (Lam.) Lea. E. G- 



apiculata (Q.) Say. E. G. 



appressa (Pie.) Lea. Tenn. 



tuscumbiensis Lea. 

 Aavidus Lea. 



approximus (Lam.) Lea. E.G. 



aquilus (U.) Lea. E. G. 



aratus (U.) Lea. C. Am. 



nuculinus Phil. 



arcseformis (Trun.) Lea Tenn. 



arctatus (U.) Con. E. G. 



v^ tortivus Lea. 

 tetricus Lea. 

 purpurellus Lea. 



merceri Lea. S. At. 



arcula (Ala.) Lea. S At. 



argentea (Pie.) Lea. Tenn. 



V. pannosa, Simp. Miss, 



arkansasensis (Lam.) Lea. Miss, 

 askewii (Q.) Marsh. E. G. 



asper (Q.) Lea. Tenn. 



asperatus=pustuIosa var. 

 asperrimus=lachrymosus. 

 attenuatus (U.) Lea. E. G. 



atrocostatus^perplicata. 

 atromarginatus=sIoat'anus. 

 australis (Lam.) Simp. E.G. 



avellana (Pie.) Simp. E. G. 



averyi (N.) Lea. Panama, 



aurea (Q.) Lea. W. G. 



aztecorum (Lam.) Phil. Mex. 



V. chapalanus v. Marts. 



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