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margaritifera, var., 
marginata, Say, 
sf var., 
Raveneliana, Lea, 
rugosa, Barnes, 
undulata, Say, 
S var., 
Vondembuschiana, Lea, 
discoideus, Lea, 
ac var., 
“ “ 
plicatus, Leach, 
s var., 
“ it 
ce ii3 
ce “ 
“ “ 
avicularis, Lam., 
ss var., 
“ “ 
“ce “ 
Browniana, Lea, 
corrugata, Lam., 
sé var., 
“ “ec 
“ “ 
“ “ 
England, 
France, 
England, 
Hudson River, 
New York, 
New Jersey, 
545 Lake Erie, 
543 Schuylkill River, 
Ohio River, 
Swananoe River, 
Fox River, 
New York, 
ree 
Virginia, 
New Jersey, 
Java, 
GENUS DIPSAS. 
China, 
Canton, 
558 
GENUS HYRIA. 
561 Amazon River, 
South America, 
Guiana, 
Amazon River, 
562 South America, 
Solimoés River, 
Guiana, 
Turt. Man., p. 19, pl. 2, f. 9. 
Drap., pl. 10, f. 17-19. 
Flem. B. Anim.,p.417, No. 429. 
Sillim. Jour., v. 6, pl. 12, f. 20. 
Jour. Ac. N.S., v. 1, p. 459. 
Wood’s Supp., pl. 1, f. 7. 
Mss Ame PaSs vs os plal7, f.50: 
Sillm. Jour., v. 6, pl 13, f. 21. 
Nich. Enc. Am., pl. 3, f. 3. 
Say in Pamph., 1840, p. 9. 
Wood’s Supp., pl. 1, f. 5. 
Sowb. Gen., f. 3. 
Ts. Am. P.S., v.8, pl. 18, f. 39. 
Leach. 
Ts. Am. P.S., v. 5, pl. 11, f. 88. 
Grif. Cuv., pl. 24, f. 2. 
Grif. Cuv., pl. 24, f. 2. 
Ts. Am. P.S., v. 8, pl. 14, f. 24. 
Blain Mal., pl. 66, f. 3. 
Lamarck. 
Delessert, pl. 12, f. 9. 
Swains. Exot. C., pl. 24. 
Icon. du R. Anim., pl. 28, f. 8, 
Spix. Text. B., p. 35, pl. 27, f. 1,2. 
Ts. Am. P.S.,v. 6, pl. 24,f.116. 
Enc. Meth., pl. 247, f. 2. 
Wood’s Supp., pl. 1, f. 12. 
Sch. Ess. Class. Coq., pl. 11, f. 3. 
Spix.od. B., p./35,pl29,f. 1,:2: 
Unio margaritiferus, Pfeiff. 
Unio rivalis, Ziegl. 
Alasmodonta margaritiferum. 
Alasmodonta areuata, Barnes. 
Alasmodonta marginata, Say. 
Alasmodonta truncata, Say. 
Unio ecariosa, Lam., var. ? 
Unio varicosa, Lam. 
Unio ecalceolus, Say. 
Mya regulosa, Wood. 
is Margaritana costata, Raf. 
Alasmodonta undulata, Say. 
Alasmodonta sculptilis, Say. 
Mya undulata, Wood. 
Unio hians, Valence. 
Unio glabratus, Sowb. 
Symphynota discoidea, Lea. 
Unio tenuis, Gray. 
Anodonta tenuis, Gray. 
Symphynota bi-alata, Lea. 
Unio bi-alata, Desh. 
Unio bilineatus, Bens. 
Mytilus dubius, Gmel. 
Anodon alatus, Sowb. 
Anodonta dipsas, Blain. 
Hyria elongata, Swains. 
Unio caudatus, Wagn. 
Unio corrugatus, Blain. 
Mya angulata, Wood. 
Paxyodon ponderosus, Schum. 
Triplodon rugosus, Spix. 
Unio rugosus, Wagn. 
