818 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



*Margaron (Unio) javanus Lea, Syn., 1852, p. 30. 



*Z7nio exiHs DuNKER, Zeits. fiir Mai., III., 1846, p. 109.— MoussON, L. und S. W. 



Moll. Java, 1849, p. 92, pi. xvi, fig. 3. 

 *Margaron (Unto) exilis Lea, Syn., 1852, p. 29. 



* Unio mutatns MoussoN, L. und S. W. Moll. Java, 1849, p. 92, pi. xvi, figs. 1, 2; 



Zeifcs. fiir Mai., VII, 1851, p. 46; *H. and A. Adams, Gen. Ree. Moll., II, 1857, p. 



494.— *PyETEL, Concli, Sam., Ill, 1890, p. 160. 

 *Margaron ( Unio) mutatus Lea, Syn., 1852, p. 29. 

 *Unio mederianvs Kuster, ' Conch. Cab. Unio, 1861, p. 242, pi. lxxx, fig. 7.— 



*PiETEL, Conch. Sam., Ill, 1890, p. 158. 



Java. 



tNODULARIA DIMOTA Lea. 



* Unio sumatreensis, Lea, Pr. Ac. N. Sci. Phila., Ill, 1859, p. 153; * Jl. Ac. N. Sci. 



Phila.,IV, 1860,p.239,pl.xxxiv,fig. 118; *Obs., VII, 1860, p. 57. pi. xxxiv, 

 fig, 118.—* P-ETEL, Conch. Sam., Ill, 1890, p. 169. 



* Margaron ( Unio) dimotus, Lea, Syn., 1870, p. 30. — ^ * p^tel. Conch. Sam., Ill, 



1890, p. 150.^ 



Sumatra. 



NODULARIA FISCHERIANIA L. Morlet. 



*Unio fischerianus, L. Morlet, .11. de Conch., XXXI, 1883, p. 109, pi. iv, fig. 6.— 

 * P^tEl, Conch. Sam., Ill, 1890, p. 1.52. 



Cambodia. 



tNODULARIA ANODONT.^FORMIS Tapperone-Canefri. 



* Unio (Microdontia) anodonUfformis Tapperone-Canefri, Ann. Mus. Genov., 



XIX, 1883, p. 295, pi. xi, figs. 3-5. 



* Unio anodonta'formis PiETEL, Conch. Sam., Ill, 1890, p. 144. 



New Guinea. 



tNODULARIA SACELLUS Drouet and Chaper. 



* Unio sacellus Drouet and Chaper, Mem. Soc. Zool. Fr., V, 1892, p. 148, pi. V, 



figs. 4-6 ; Jl. de Conch., XLI, 1893, p. 43. 



Borneo. 



tNODULARIA LUGENS Drouet and Chaper.* 



* Unio lugens Drouet and Chaper, Mem. Soc. Zool. Fr., V, 1892, p. 147, pi. v, 



figs. 1-3.— * Drouet, Jl. de Conch., XLI, 1893, p. 44. 



Borneo. 



' Kuster credits this to Mousson, Couch, of Java, p. 92. I know of no such work, 

 and the name is not found in Mousson's L. und Suss. W. Moll, von Java. 



■^Changed to this name by Lea because sumatreensis was preoccupied for a Unio by 

 Dunker. 



3 This species varies much in sculpture, and shows the connection between the 

 nearly smooth contradens and the strongly corrugated forms like rusticus and 

 dmttzeniergi. It is really A'erj'Aclose to contradens. 



■^I am doubtful whether these two are more than varieties of the same thing. 

 The N. lugens is darker colored aud seems to lack a little tubercle on the hinge, 

 which is sometimes present in saceUus. 



