NO. 1205. SYNOPSIS OF THE NAIADES-SIMPSON. 819 



t NODULARIA FULVASTER Drouet and Chaper. 



* I'nio ful raster DROUET and CHAPKR, Mem. Soc. Zool. de Fr., V, 1892, p. 154, pi. 



vi, figs. 11-13. * DROUET, Jl. de Conch., XLI, 1893, p. -15. 



Borneo. 



NODULARIA SEMIDECORATA L. Morlet. 



"Unio semidecoratua L. MOKLKT, .11. de Couch., XXXVII, 1889, p. 192, pi. vill, 

 fig. 4. 



River Srakeo, Siam. 



i NODULARIA RUSTICA Lea. 



* Unio rusticus LEA, Pr. Ac. N. Sci. Phila., VIII, 1856, p. 93; * Obs., VI, 1857, p. 14, 



pi. xxv, fig. 7. *J1. Ac. N. Sci. Phila., Ill, 1858, p. 294, pi. xxv, fig. 7. *VON 

 MARTENS, Pr. Zool. Soc. Loud., 1860, p. 14. *MORELET, Ser. Couch., IV, 1875, 

 p. 353, pi. xvn, fig. 7. *P.ETEL, Couch. Sam., Ill, 1890, p. 166. 



* Margaron ( Unio) rusHctts LEA, Svu., 1870, p. 31. 



* Unio paivanus MORKLET, Jl. do Conch., XIII, 1865, p .227. 



* Unio cambojensis SOWERBY, Conch. Icon., XVI, 1866, pi. XLII, fig. 231. *PA:TEL, 



Conch. Sam., Ill, 1890, p. 147. 



Siain; Cambodia. 



t NODULARIA DAUTZENBERGI L. Morlet. 



Unio dautzenbergi MORLET, Jl. de Conch., XXXVII, 1889, p. 190, pi. vm, fig. 5. 

 River Srakeo, Siam. 



NODULARIA SOBOLUS Fischer. 



* Unio siamensis MORLET, Jl. de Conch., XXXVII, 1889, p. 194, pi. vn, fig. 2. 



* Unio sobolus FISCHER, Bull: Soc. d' Autun., 1891, p. 227.' 



Siam. 



NODULARIA VERBECKI Bottger. 



* Unio rerbecki BOTTGER, Zool. Erg. Nied. Ost. Ind., IV, 1897, p. 89, pi. v, figs. 1, 



2, 4, 5. *PJETEL, Conch. Sam., Ill, 1890, p. 171. 



Sumatra. 



t NODULARIA ORIENTALIS Lea.- 



* Unio orientalis LEA, Pr. Am. Phil. Soc., 1, 1840, p. 285 ; * Tr. Am. Phil. Soc., VIII, 

 1842, p. 221, pi. xvin, fig. 38; * Obs., Ill, 1842, p. 59, pi. xvm, fig. 38. 

 *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 491. * CHENU, 111. Conch, 

 1858, pi. xxxn, figs. 6, 6a, 6b. * KUSTER, Conch. Cab. Uuio, 1861, p. 241, pi. 

 LXXX, fig. 16. * VON MARTENS, Mai. Bl., XIV, 1866, p. 15. * SOWERBY, Conch. 

 Icon., XVI, pi. xci, fig. 491.* P.TEL, Conch. Sain., Ill, 1890, p. 162. 



1 Changed from siamensis to sobolus because the former was preoccupied by Lea. 

 Probably an old, smooth rusticus. 



I hardly know where to plac this, as the only shell I have seen (the type) is 

 evidently young, and has the beaks eroded until I can not make out the sculpture. 

 It seems most likely to be an elongated, somewhat compressed member of the con- 

 tradens group. 



