Arius mclanopterygins Bleeker, Verh. Bat. Gen. XXII. 1849. Bijdr. Ichthyol. 



Madura p. 10. 



Cephalocassis caelatus Bleeker, Ichth. Arch. Prodr. I. Siluri, 1858, p. no. 

 Aritis caelatus Bleeker, All. Ichth. II. 1862, p. 35. 

 Arius caelatus Giinther, Cat. Brit. Mus. V. 1864, P- 158. 

 Arius caelatus Day, Fishes of India 4. 1878 1888, p. 459. 

 Aritis caelatus Vinciguerra, Ann. Mus. Civ. Geneva XVI. 1880, p. 173. 



B. 6; D. I. 7; A. 1920; P. I. 9; V. 6. 



Elongate. Height 4 2 / 3 to more than 5. Head 3 ! / 2 to nearly 

 4, its greatest width equal to its length without snout. Upper 

 surface of head granulated. Occipital process carinated, its 

 sides nearly parallel, as long as or slightly longer than 

 its base, which is not much broader than its concave end, 

 which is connected with the small, crescent shaped, corrugated 

 basal bone of the dorsal spine. The narrow median fontanel, 

 beginning behind the eye, reaches to the keel of the occipital 

 process. Dorsal profile sloping downwards in a straight line. 

 Eye 4 5'/ 3 , with a free orbital margin, 2 ! / 5 in postorbital 

 part of head, about twice in the interorbital space and less 

 than twice in the rounded, obtuse, slightly prominent snout. 

 Maxillary barbels extend to the middle or to the end of the 

 pectoral fin, mandibulary barbels to half of pectorals, mental 

 ones ] / 2 shorter. Height of dorsal about equal to length of head. 

 Dorsal spine produced into a soft, long filament, its osseous 

 part equal to head, very strong, particularly in its basal half, 

 granulated anteriorly, serrated behind. Adipose fin considerably 

 shorter than dorsal, more than thrice in 

 its distance from dorsal, opposite to 

 anterior half of anal, the height of which 

 is nearly equal to the length of the ven- / v'.-v," 

 trals, which reach to the origin of the 



anal and are longer than head without Fi g- '34- Arius caelatus 



C. V. Teeth of upper jaw 

 its postorbital part. Pectorals somewhat an( i pa i a t e x i' 2 /3- 



shorter than head, their spine shorter 



and less strong than the dorsal one. Caudal deeply forked. 

 Villiform teeth in the jaws in an arcuate band. On the palate 

 in two widely separate, triangular patches, the anterior rounded 

 base of which is considerably longer than their height. About 

 8 stiff, flattened gillrakers, which are about equal to ! / 3 of the 

 eye. Blackish above, dark grey below. Adipose fin black, at 

 least the distal part of the fins blackish. Length over 300 mm. 



