882 ri;<>< I;/;DI.\<;S or rm: .v.ivvo.v.//, .i/r>/-:n/. V.M.. \\n. 



1'niudijilodon PiiiLii'i-i, Mai. Bl., XVI, 1869, p. 46.* PFKIFFF.R, Nov. Conch.. TIT, 



1869, p. 483, pi. <iv, figs. 7, 8. *P,KTKL, Conch. Sam., Ill, 1890, p. 150. 

 *t I'nio diinkeriaiins LKA, Pr. Ac. N. Sci. Pliila., VIII, 1856, p. 94; *Obs., VI, 1S.V7, 

 p. 25, pi. xxin, fig. 20; * Jl. Ac. N. Sci. Phila., Ill, 1858, p. 303, pi. xxvm, fig. 

 20. *KUSTKR, Conch. Cab. Unio, 1862, p. 290, pi. xrn, fig. 6. ~ SOWKRHY, 

 Conch. Icon., XVI, 1868, pi. xc, fig. 485. ' P.F.TKL, Couch. Sain., III. 1890, 

 p. 151. * VON iHERixtt, Arch, fiir Nat., 1893, p. 109. 



Maryaron ( Unio) dunkerianus LEA, Syn., 1870, p. 32. 



Peru; Chile. 



DIPLODON OBTUSUS d'Orbigny. 



* Unio obtttsa D'ORBIGNY,' Gner. Mag., 1835, p. 35; * Voy. Aiu. Mer., 1843, p. 610. 



*HUPE, Gay's Hist. Chile, VIII, 1854. p. 316. 



Chile. 



DIPLODON RHUACONICUS Kuster.- 



* Unio rlniaconicus KUSTER, Conch. Cab. Unio, 1856, p. 145, pi. xi.n. fig. 5. 



Brazil. 



f DIPLODON CHILOENSIS Kuster. 



*Unio cliiloensis KuSTKR, Conch. Cab., 1856, p. 161, pi. xxxv. fig. 6. 1' 1:11:1., 

 Conch. Saui., Ill, 1890, p. 148. 



Island of Chiloe, Chile. 



t DIPLODON CASiEBLANC^ Philippi. 



* Unio casceblanca; PHILIPPI, Zeits. fur Mai., V, 1848, p. 176. 



*Unio casablancw PFEIFFER, Nov. Conch., Ill, 1869, p. 481, pi. civ, figs. 1.2. 

 * P^TEL, Conch. Sam., Ill, 1890, p. 147. 



* Mar gar on ( Unio) casablanccB LEA, Syu., 1870, p. 53. 



*Unio longus PHILIPPI, Mai. BL, XVI, 1869, p. 44. * PFEIFFKR, Nov. Conch., Ill, 

 1869, p. 477, pi. cm, figs. 1, 2.* P.KTEL, Conch. Sam., Ill, IWtO, p. 158. 



* Unio colchagncnsis PHILIPPI, Mai. Bl., XVI, 1869, p. 47. * PFEIKFKR, Nov. Conch., 



Ill, 1869, p. 484, pi. civ, figs. 9, 10. * P.F.TKL, Conch. Sam., Ill, 1890, p. 148. 



* Uniofoncki PHILIPPI, Mai. Bl., XV, 1869, p. 49. PKEIFFEU, Nov. Conch., Ill, 



1869, p. 483, pi. civ, figa. 5, 6. 



* Unio funcki P^ETEL, Couch. Sam., Ill, 1890, p. 153. 



Chile. 



DIPLODON FRENZELLII von Ihering. 



* Unio frenzellii VON IHERING, Arch, fiir Nat., 1893, p. 3, pi. iv., fig. 12. 

 Patagonia and Chile. 



DIPLODON MARTENSI von Ihering. 



*Unio martensi VON IHERING, Arch, fiir Nat., 1893, p, 100, pi. iv, fig. 10. 

 Southern Brazil. 



'Said by d'Orbigny to be of Ferussac, bnt he does not say where that author 

 described it, and I do not know where. This name has been used for nt least four 

 different species of Unionidce: Asrfbove; in Cuvier's Animal Kingdom (edition with- 

 out date) ; for Unio retusns, by Potiez and Michaud ; and by Dr. Lea. I presume that 

 d'Orbigny is entitled to the name. 



2 Raster credits this to "Pfeifter teste Charpentier." I do not know what it is. It 

 is very different from d'Orbiguy's rhuacoica. 



