NAIADES. 63 



192. U. plicatus, Say, Amer. Conch, pi. 1. f. 8. 



Unio Peruvianus, Lamarck ; Unio rariplicatus, Lamarck ; 

 Uiiio Dombeyanus, Valenciennes ; Unio undulatus, 

 Deshayes; Unio multiplicatus, Deshayes. 



193. U. pliciferus, Lea, Obs. Unio. v. 2. p. 61. pi. 17. f. 53. 

 194^. U. ponderosus, Lea, Wood's Gen. Conch.pl. 20. f. 21. 



Mya ponderosa, Dillwyn ; Mya crassa, Wood. 



195. U. productus, Conrad, Monog. p. 31.pl. 14. f. 1. 



196. U. pulcher, Lea, Trans. Amer. Phil. Soc. v. 6. pi. 3. f. 6. 



197. U. pumilus, Lea, Obs. Unio. v. 2. p. 23. pi. 7. f. 17i 



198. U. purpuratus, Lamarck, Lea, Tr. Am. Ph. Soc. v. 3. pi. 7- f. 9. 



Mya ventricosa, Solander ; Unio ater, Lea ; Unio lugubris, 

 Say ; Unio Paulsotiii, Conrad. 



199. U. pustulatus, Lea, Trans. Amer. Phil. Soc. v. 4. pi. 7. f. 9. 



200. U. pustulosus, Lea, Trans. Amer. Phil. Soc. v. 4. pi. 7. f. 7. 



Unio verrucosus, Barnes. 



201. U. pyramidatus, Lea, Trans. Amer. Phil. Soc. v. 4. pi. 16. f. 39. 



Unio Mytiloides, Conrad ; Mya obliqua. Wood. 



202. U. radiatus, Lamarck, A. s. v. v. 6. p. 535; Con. Mon. pl.lO. f.2. 



Unio virginianus ? Lamarck ; 31ya radiata, Gmelin ; Mya 

 oblongata. Wood ; Mya pictorum tenuis, Chemnitz. 



203. U. radiatus (Alasmodonta), Conrsid, Sil. Journ. p. 25. pi. 1. f.lO. 



Margaritina radiata. Lea. 



204. U. Rangianus, Lea, Trans. Amer. Phil. Soc. v. 6. pi. 18. f. 56. 



205. U. Ravenelianus, Lea, Trans. Amer. Phil. Soc. v. 5. pi. 3. f. 5. 



206. U. rectiformis, Schmidt, Draparnaud, Moll, de France, 



p. ll.f.3. 



207. U. rectus, Lamarck, An. s. v. v. 6. p. 537 ; Conrad's Mon. pi. 15. 



Mya prcelonga. Wood ; Unio prcelongus, Barnes. 



208. U. retusus, Lamarck, A. s. v. v. 6. p. 534 ; Conrad's Mon. pi. 8. 



Unio torsus, Rafinesque. 



209. U. rhombeus, Wagner, Test. Brazil, pi. 28. f. 1, 2. 



Diplodon rhombeum, Spix. 



210. U. Roanokensis, Lea, Trans. Amer. Phil. Soc. v. 6. pi. 8. f. 21. 



211. U. rotundatus, Lamarck, Anim. sans vert. v. 6. p. 538. 



Unio suborbiculatus, Lamarck ; Unio globulus, Say; Unio 

 subglobulus. Lea. 



212. U. rubelluS; Cowrac?, Freshwater Shells, p. 38.pl. 6. f.2. 



213. U. rubiginosus, Lea, Obs. Unio. p. 41.pl. 8. f. 10. 



214. U. rugosus (^Alasmodonta), Barnes, Sil. Journ. v. 6. pi. 13. f. 21. 



Margaritina rugosa. Lea; Alasmodonta abducta, Say. 



215. U. Schoolcraftensis, Lea, Trans. Amer. Phil. Soc. v. 5. pi. 3. f".9. 



Unio prasinus, Conrad. 



