266 SEALE. 



Tyj)e, No. 25G6 in the collection of the Bureau of Science, from 

 Sandakan, Borneo. Length 80 millimeters. 



Family SILUEID^E. Catfishes. • 



Arius sagor Hamilton. 



Bexanematichthys sundaicus Bleeker, Atlas Iclith. (1862), 2, 26, pi. 62. 



Bleeker ^ gives an excellent figure of this species. It is easily 

 recognized by the banded appearance of the upper half of the body. 

 These bands 'extend down to, or slightly below, the single lateral line 

 and are evident even in specimens which have been long in alcohol. 

 The young do not show the banded markings. 



There are four patches of teeth on the palatine, separated by inter- 

 spaces. The bony shield at base of dorsal spine. is separated from the 

 head shield. No. 2497; length, 370 millimeters; Nos. 2437, 2462 and 

 2518; length, 115 to 135 millimeters, young. 



The species is regarded as an excellent food-fish and is common in 

 the market of Sandakan. It has not been reported from the Philippines. 



Tachysurus venosus (Cuvier and Valenciennes). 



Arius venosus Bleeker, Atlas lehth. (1862), 2, 33, pi. 54, fig. 1. 



Grayish with a silvery wash; the fins have a slightly darker shade; 

 under parts white. Nos. 2514 and 2625; length, 135 to 170 millimeters. 



Characterized by an almost smooth head. Two triangular shaped 

 areas of villiform teeth on the palate. A common food fish of Borneo. 

 This species is recorded by Cuvier and Vallenciennes from Manila. 



Arius argyropleuron (Kuhl and Van Hasselt). 



Grayish with a j'ellowish wash; yellowish white below. No. 2682; 

 length, 145 millimeters. 



Chai-acterized by the ovate maxillary patch of granular teeth, the 

 elongate snout, and the dusky, adipose fin. A food fish of Borneo, not 

 reported from the Philippines. 



Family PLOTOSID>B. Sea Catfishes. 

 Plotus anguillaris (Blooh.). 



Color drab-gray; three longitudirial white stripes on each side from 

 tip of head to tip of tail; fins all washed with slate-gray, darker at 

 extremities; chin, belly, and throat yellowish cream. Nos. 2683, 2446, 

 2677, 2655; length, 160 to 195 millimeters. 



This species is regarded as a good fish, but owing to the stinging 

 wounds inflicted by its spines and because of its small size, it is not 

 often seen in the market. It is also common throughout the Philippines. 



»Atl. lehth. (1862), 2, pi. XIV. 



