882 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxii, 



' Uniodiplodon Philippi, Mai. BL, XVI, 1869, p. 46.— *Pfeiffer, Nov. Conch., Ill, 

 1869, p. 483, pi. CIV, figs. 7, 8.—* PzETel, Coucli. Sani., Ill, 1890, p. 150. 



*t Unio dunkerianus Lea, Pr. Ac. N. Sci. Phila., VIII, 1856, p. 94; *Obs., VI, 1857, 

 p. 25, pi. XXIII, fig. 20; " Jl. Ac. N. Sci. Phila., Ill, 1858, p. 303, pi. xxviii, fig. 

 20.— *KusTEE, Conch. Cab. Unio, 1862, p. 290, pi. xcii, fig. 6. — *So\verby, 

 Conch. Icon., XVI, 1868, pi. xc, fig. 485.— "P/ETel, Conch. Sam., Ill, 1890, 

 p. 151.—* S'ON Iheking, Arch, fiir Nat., 1893, p. 109. 



* Margaron ( Unio) dunkerianus Lea, Syn., 1870, p. 32. 



Peru; Chile. 



DIPLODON OBTUSUS d'Orbigny. 



* Unio obtusa d'Orbigny,' Guer. Mag., 1835, p. 35 ; * Voy. Am. 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. xlii, fig. 5. 

 Brazil. 



t DIPLODON CHILOENSIS Kuster. 



''Unto chiloensis KuSTKR, Conch. Cab., 1856, p. 161, pi. xxxv, fig. 6. — "P.etel, 

 Conch. Sam., Ill, 1890, p. 148. 



Island of Chiloe, Chile. 



t DIPLODON CASi^BLANCiE Philippi. 



* Unio cascehlancw Philippi, Zeits. fiir Mai., V, 1848, p. 176. 



*Unio casahlavcw Pfeiffek, Nov. Conch., Ill, 1869, p. 481, ])1. civ, figs. 1,2. — 



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



* Margaron ( Unio) casaMancce Lea, Syn., 1870, p. 53. 



*Unio longus Philippi, Mai. BL, XVI, 1869, p. 44.— * Pfeiffer, Nov. Conch., Ill, 

 1869, p. 477, pi. cm, figs. 1, 2.— '* P^tel, Conch. Sam., Ill, 1890, p. 158. 



* Unio colchaguensis Philippi, Mai. BL, XVI, 1869, p. 47. — * Pfeiffer, Nov. Concli., 



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



* Uniofoncki Philippi, Mai. BL, XV, 1869, p. 49.—" Pfeiffer, Nov. Conch., Ill, 



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



* Unio fimcki P^tel, Conch. 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, fur 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 at least four 

 different species of Unionidce: As above; in Cnvier's Animal Kingdom (edition with- 

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

 d'Orbigny is entitled to the name. 



-Kuster credits this to "Pfeiffer teste Charpentier." I do not know what it is. It 

 is very different from d'Orbigny's rhuacoica. 



