462 PROCEEDINGS OF THE ACADEMY OF [July, 



former species. Length 7f inches. Baram river. Messrs. Harrison 

 and Hiller. 



CHACIDJE. 



11. Chaca bankanensis Bleeker. 



One from Kapiias river. Length 6^ inches. Messrs. Harrison and 

 Hiller. 



SILURID^. 



TACHYSURIN.E. 



12. Galeichthys sondaicus (Valenciennes). 



A very interesting example has the mouth and pharynx nearly filled 

 with ova in all stages of development. They are easily seen in the 

 pharynx through the gill-arches. The largest eggs are about 15 mm. 

 in diameter, the others varying down to rather large shot. Though 

 not dissected the intestinal canal appears to be empty and the fish is a 

 male. Length 12 inches. Two examples from Dr. Fm-ness. Another 

 was secured by Messrs. Harrison and Hiller in 1897. 



A small example from the mouth of the Baram secured by Dr. Fur- 

 ness is 5| inches long. Caudal more or less brownish, and no traces of 

 the vertical pale lines shown in Bleeker's figure.*^ In this respect it 

 agrees with the examples noted above, though the maxillary iDarbels 

 are^^longer, reaching origins of ventrals. 



13. TaohyBurus argyropleuron (Valenciennes). 



Head 3^ to 3f ; depth 3| to 4|; D. I, 7; A. v or vi, 15 or 16; total 

 length of fish 4 to 9^ inches. Rakers short, shorter than filaments, and 

 not numerous. Color in alcohol pale brown above, lower surface white 

 and together with sides washed with silvery. Dorsal and caudal 

 brownish. Pectoral and ventral brownish above, also outer portion 

 of anal. From the largest one I extracted a small Siluroid, evidently 

 the young, which measures a trifle over 2 inches (52 mm.)." It does 

 not have the dark or dusky blotch seen on upper portion of adipose 

 fin of the next example in size, and top of the head is nearly smooth or 

 hardly rugose. Snout pale like the belly. The next example, or one 

 second in size, has first dorsal ray prolonged considerably beyond dorsal 

 spine. A third example has interorbital space and snout pale or whitish 

 like belly. Lower fins also whiter and adipose fin a little paler. From 

 the pharynx I extracted eggs, the largest about 10 mm. in diameter. 



» Aflaf< Ichth.. II, 1S63, PI. (14) 62. 



" I have not included this specimen in the above measurements, etc. 



