836 PROCEEDINGS OF THE NATIONAL MUSE I'M. VOL. xxn. 



Section PSEUDODON Gould, 1844. 

 (Type, Auodon SaUr'nnann Gould.) 



Characters given under generic name. 



(Group of Ptseudodon harmandi.) 



Shell rather small, solid, rhomboid, short, inflated; posterior ridge 

 high, only slightly biangulate, faintly corrugated, on the posterior 

 slope. 



t PSEUDODON HARMANDI Crosse and Fischer. 



* Pseudodon harmandi CROSSE and FISCHER, Jl. de Conch., XXIV, 1876, p. 331, pi. 



x, fig. 2. 

 * Monocondyla'a harmandi P.ETEL, Conch. Sam., Ill, 1890, p. 174. 



Cambodia. 



PSEUDODON AUREUS Heude. 



* Pseudodon aiireus HEUDE, Couch. Fluv. Nank., IX, 1885, pi. LXXII, fig. 140. 



* Margaritana aurea P.ETEL, Conch. Sam., Ill, 1890, p. 172. 



China. 



(Group of Pseudodon vondembuschianns.) 



Shell rather large, somewhat compressed, subsolid, elliptic-rhomboid, 

 wider behind, where it is widely biangulate; teeth compressed. 



t PSEUDODON VONDEMBUSCHIANUS Lea. 



* Margaritana rondembitschiana LEA, Pr. Am. Phil. Soc., I, 1840, p. 288; *Tr. Am. 



Phil. Soc., VIII, 1842, p. 222, pi. xvin, fig. 39; *Obs., Ill, 1842, p. 60, pi. 

 XYIII, fig. 39. * KUSTER, Conch. Cab. Unio, 1862, p. 295, pi. xcvin, fig. 3. 



* Mar gar on (Monocondyla'a) vondembuschiana LEA, Syn., 1852, p. 45; 1870, p. 73. 



* Monocondyhra rondembitscJiiana H. and A. ADAMS, Gen. Rec. Moll., II, 1858, p. 



501. * P.ETEL, Conch. Sam., Ill, 1890, p. 175. 



* Pseudodon rondembuschiaiia COXRAD, Am. Jl. Conch., I, 1865, p. 233. 

 * Monodontina buschiana CONRAD, Pr. Ac. X. Sci. Phila., VI, 1853, pp. 269, 449. 

 *rio von buscnea SOWERBY, Couch. Icon., XVI, 1866, pi. LI, fig. 269. 



* Alasmodonia crispata Moussox, L. and Suss. W. Moll. Java, 1849, p. 97, pi. xvin, 



figs. 1. 2. 



* MargarUana cr'wpata P.ETEL, Conch. Sam., Ill, 1890, p. 173. 



t * Monocondyla'a planulata LEA, Pr. Ac. N. Sci. Phila., XI, 1859, p. 187; * Jl. Ac. N. 

 Sci. Phila., IV, 1859, p. 262, pi. XLII, fig. 142; *Obs., VII, 1860, p. 80, pi. 

 XLII, fig. 142.* ? KUSTER, Conch. Cab. Unio, 1862, p. 305, pi. c, fig. 8. 



* Pseudodon planulata COXRAD, Am. Jl. Conch., I, 1865, p. 233. 



* Microcondyla>a planulata P.ETEL, Conch. Sam., Ill, 1890, p. 175. 



* Margaron (Monocondyla'a) planulata LEA, Syii., 1870, p. 73. 



* Maryaritana fragilis KUSTER, Couch. Cab. Unio, 1862, p. 295, pi. xcvin, fig. 2. 



* Microcondyla-a fragili* P.ETEL, Conch. Sam., Ill, 1890, p. 175. 



* Monocondyla;a rhombica KUSTER, Conch. Cab. Unio, 1862, p. 304, pi. o, fig. 7. 



Java; Sumatra; Borneo; Malacca. 



t PSEUDODON ELLIPTICUM Conrad. 



* Pseudodon elUpticiim CONRAD, Am. Jl. Conch., I, 1865, p. 352, pi. xxv, fig. 1. 

 Cambodia. 



