718 UNIO 
Species INCERT/E SEDIS 
UNIO PAJAKOMBOENSIS Bullen. 
“Shell solid, ovate, inflated, slightly gaping at both ends; 
epidermis shining, yellow-brownish-green; valves subrotund, 
sloping posteriorly, concentrically substriate; unbones close 
together, eroded; cardinal tooth of the right valve long, erect, 
sloping, almost smooth. sometimes with a small, auxillary 
parallel tooth situated near the external margin; lateral tooth 
elongate ; lateral teeth of the left valve elongate and of equal 
length; cardinal tooth nearly obsolete; anterior cicatrix deep, 
posterior less impressed. 
Length 77, height 51.5, diam: 37 mm.” (Bullen). 
Type locality. Pajakombo, Sumatra. 
Unio pajakomboensis Butien, Pr. Mal. Soc. London, VII, 
1906, p. 15, pl. 1, figs. 9-1T. 
Schizocleithrum pajakomboense Haas, Conch. Cab. Unio, 
TOU: plexi NSSs45 0: 
Haas has recently, (Nachr. Deutsch. Mal. Ges., 1913, p. 36), 
made this species the tvpe of a new genus, Schizocleithrum. 
UnIo TAUMILAPANUS Conrad. 
“Oblong, somewhat compressed; substance of shell thick 
anteriorly and over the umbo; disks flattened; ligament mar- 
gin nearly parallel with basal margin; umbo decorticated ; 
within pure white. 
Allied to U. miger Raf., but more reendlen oblong and very 
white inside.” (Conrad). 
Type locality, San Juan River, Taumilapas. 
Unio taumilapanus Conran, Pr. Ae. N. Sei. Phila., XII, 1855, 
p. 256.—Le, Syn..-1870, p. 65.—von Martens, Biol. Cent. 
Am., Moll., 1900, p. 521. 
Unio taumilapasensis, Fiscuer and Crosse, Miss. Scient. 
Mex., Moll., II, 1894, p. 621. 
This species, which was accidentally omitted from the 
Synopsis, T have not been able to identify. Both Fischer and 
Crosse and von Martens have been equally unsuccessful. Con- 
rad identifies niger Raf. with crassidens Lam. and incrassatus 
Lea. 
