262 ^ [Februauy, 



Margaritana, Schumacher. 



Marg. arcuata. 



Alasmodonta arcuata, Barnes^ Sillim. Journ. vi. 277, 12, 20. 



Gould, Invert, of Mass. 114, fig. 75. 



Behay, Zool. of New York, 197, 14, 224. 

 Margaritana margaritifera, ie, (not Lui.) Synopsis, 43. 

 M. arcuata, Stimpsoiif Shells of New England, 15. 



falcata, Gould. 



monodonta. 



Unio nnonodontus, Say, Amer. Conch, pi. 6. 



Desk. ed. of Lam. An. sans Vert. vi. 553. 

 Alas, monodonta, Fer. Guerin's Mag. 1835, note 8, 31. 

 U. Soleniformis, Lea, iv. 86, 10, 16, Synopsis, 39. 

 Chenu, Conchyl. Unio, pi. 14, fig. 4. 



Alasmodonta, Say. 



arcula, Lea, 1838, vi. 71,22, 69, Synopsis, 42. 



confragosa. Say. Amer. Conch, pi. 21. 



U. confragosa, Desk. ed. of Lam. vi. 553. 

 Marg. confragosa, Lea, Synopsis, 42. 



marginata. Say, Journ. Acad. Nat. Sc. i. 459. 

 Barnes, Sillim. Journ. vi. 279. 



U. varicosa. Lam. An. sans. Vert. vi. 78, Desh. ed. 513. 

 Mya rugulosa. Wood. Index, Sup. pi. 1, fig. 7. 

 Margaritana marginata, Lea, Synopsis, 42. 

 Alas, nnarginata, Delay, Zool. of New York, 196, 14, 226. 



truncata. Say, MSS. Gould, Invert. 117. 

 Alas, marginata, Auc. (Western var.) 



Leptodea, 22<z/*.. 



Lept. lata, Uaf., Ann. v. 51, 82, 17, Poulson's Trans. 61. 

 U. dehiscens, Say, Disseminator, ii. 308. 



Amer. Conch, pi. 24. 

 Desh. ed. of Lam. 554. 

 U. oriens. Lea, v. 4, 6, 5, Synopsis, 43. 

 U. dehiscens, Lea, Synopsis, 43. 

 Chenu. Conchyl. Unio, pi. 14, fig. 2. 

 Anodonta lata, Fer. Guerin's Mag. 1835, 2.5. 

 U. latus, Say, Amer. Conch. Syn. of Unio, No. 44. 



leptodon, Raf., Ann. v. Poulson's Trans. 21. 



U. leptodon. Say. Amer. Conch. Syn. of Unio, No. 6. 



Fer. Guerin's Mag. 25. 



Con., Monog. 59, 33. 

 U. planus, Barnes, Sillim. Journ. vi. 272. 



Anodonta purpurascens, Swain., Zool. Illust. 1st ser. iii. pi. 160. 

 Symphynota tenuissima. Lea, iii. 453, 11, 21. 

 Unio tenuissima. Lea, Synopsis, 38. 



Stropuitus, Raf. Hemiodon, Swains. 



argenteus. 



Anod. argentea, Lea, 223, 19, 41. 



Arkansensis. 



Anod. Arkansensis, Lea, x. 293, 29, 56. 



calceolus. 



U. calceola. Lea, iii. 265, 3, 1. 



Desk. ed. of Lam. An. sans Vert. 546. 

 Margaritana calceola. Lea, Synopsis, 43. 



