cclxiv 



palatine) and sometimes vomerine ones, these may be villiform or granular. 

 First dorsal with one spine and seven rays : the adipose of moderate 

 length or short : pectoral spine strong and serrated : ventral with six rays, 

 situated behind the vertical from the posterior margin of the first dorsal 

 fin: caudal forked or emarginate. Air-vessel not enclosed in bone. 



80, Arius gagora, Ham. Buch. Nga-youn and Nga-yeh, Burm. 

 D. |/0, A. 18-19. Teeth, palatine, molar form. Silvery. Seas of India 

 and Burma, ascending large rivers above tidal influence, and attaining 

 about a foot in length. 



81. Arius Burmanicus, Day. Nga-young, Burm. D. |/0, A. 20-32, 

 Maxillary barbels reach the base of the pectoral fin. Teeth in palate 

 villiform, in two widely set patches. Colours purplish above, silvery 

 below. Rivers of Burma. 



82* Arius sona, Ham. Buch. D. |/0, A. 16-17. Maxillary barbels 

 reach the end of the head. Teeth in palate villiform, in two triangular 

 patches, almost confluent with the vomerine ones. Brownish, becoming 

 white below. Ascends large Indian and Burmese rivers, often above tidal 

 influence. 



Genus PANGASITJS, Cuv. fy Val. 



Pseudopangasius, pt., Bleeker. 



Branchiostegals from about six to twelve. Gill-membranes over-lap 

 the isthmus, but are more or less separate from it. Eyes with free orbital 

 margins. Upper jaw the longer. Anterior nostrils patent and situated 

 in front of snout. Barbels four, slender, one maxillary, and at some 

 distance behind the symphysis,one mandibular pair. Teeth mlliferm in the 

 jaws, Intermixed with conical ones : they are also present in the vomer and 

 palate, the continuity of these two last being usually interrupted. A short 

 first dorsal, with a spine and seven rays situated anterior to the ventrals : 

 adipose fin short : anal long, not confluent with the caudal, which latter is 

 J or ked : ventrals with six rays. Air-vessel (in P. Buchanani) thick, 

 elongated, extending from the anterior vertebras to opposite the posterior 

 end of^ the anal fin, it has a slight contraction between its anterior and 

 posterior two-thirds. 



83. Pangasius Buchanani, Cuv. and Val. Jellum, Ooriah. D. |/0, 

 A. 31-34. Large rivers and estuaries of India and Burma, attaining 

 four feet or more in length. 



Genus PSEUDETJTROPIUS, Bleeker. 



Schilbeichthys, Bleeker. 



Branchiostegals from six to ten. Body elongated and compressed. 

 Abdominal profile more convex than that of the back. Eyes large, generally 

 having broad adipose lids, situated behind and slightly below the angle of 

 the mouth, often partly on the lower surface of the head. Head covered 

 with soft skin. Mouth anterior ; upper jaw generally the longer. Nostrils 

 patent, transverse, the posterior being nearer to one another than they are 

 to the anterior ones. Barbels eight, one pair at the posterior nostrils, one 

 maxillary, and two mandibular pairs, these last arising on a transverse line 

 close to the hind margin of the lower lip. Teeth villiform in the jaws, 



