28; 



Netuma nasiita Bleeker, Ichth. Arch. Ind. Prodr. I Siluri 1858, p. 95. 



Netuma, thalassina Bleekev, Atl. Ichth. II. 1862, p. 28. 



Arius thalassimis Giinther, Cat. Brit. Mus. V. 1864, p. 139. 



A riiis thalassinus Kner, Novara-Exp. Fische, 1865 1867, p. 310. 



Arius thalassimis Day, Fishes of India 4. 1878 1888, p. 463. 



B. 5; D. i. 7; A. 1518; P. i. 11 13; v - 6. 



Elongate. Height when young somewhat more than 4, when 

 older to 5 2 / 5 . Head 3 2 / 5 to more than 4, much broader than 

 high, its crown granulated; occipital process triangular, with 

 a median keel, longer than broad at its base, with straight 

 borders, its truncated hindborder touching the basal bone of 

 the first dorsal. Median fontanel shallow, narrowing posteriorly 

 and ending at some distance from the occipital process. 

 Humeral process triangular, strong, with waved rugae. Dorsal 

 profile nearly straight. Snout obtuse when young, when adult 

 pointed and projecting much beyond the lower jaw. Eye 

 3 6, with a free orbital margin, about twice in the snout, 

 which is nearly equal to the postorbital 

 part of the head. Maxillary barbels reaching 

 to base of pectoral, mandibulary barbels ] / 3 , 

 mental barbel about ! / 2 shorter. Height of 

 dorsal somewhat less than head, osseous 

 part of its spine granulated in front, serrated 

 behind, about equal to head without snout. 

 Base of adipose fin much shorter than its 

 height, equal to half length of dorsal, 67 Fig . II4 . Arius tha . 

 times in its distance from lastnamed, situated lassinus (Rupp.) Teeth of 

 above the middle of the anal, the lower upper jaw and palatel/ '' 

 border of which is emarginate and its height nearly equal to 

 that of dorsal. Ventrals reaching on anal, their length equal 

 to height of dorsal, slightly shorter than pectorals, the spine 

 of which is flattened granulated in front, serrated behind, 

 about as long as dorsal spine. Caudal deeply incised. Axillary 

 pore present. Villiform teeth in upper jaw in a slightly 

 arcuated broad band, in the lower jaw in a divided, somewhat 

 narrower but more curved band. Teeth on the palate in two 

 large, triangular, separate patches, the base of each triangle 

 formed by two more or less quadrangular patches, the outher 

 of which is the larger; behind them a much larger subtnan- 

 gular patch. 9 rather stiff, cylindrical gillrakers, the longest 

 about J / 3 of the diameter of the eye. Reddish brown above, 



