189 



* 



very prominent strong spines on its frontborder. Gillrakers 

 15, with 2 very short ones anteriorly, a little shorter than 

 branchial filaments. Teeth small, sharply pointed. Maxillary 

 teeth in two more or less confluent patches, which are very 

 little curved and four times as broad as long. Mandibulary 

 teeth in two contiguous, quadrangular patches with the poste- 

 rior, exterior corner laterally produced. Vomerine teeth in a 

 crescentic band. Uniform blackish, underside of head and 

 belly a little lighter, sometimes with lighter spots. Length 

 about 340 mm. 



N o m e n i n d i g. : Wiru (Mai. Batav.), Leleh and Duri (Palemb.). 



Habitat: Java (Batavia, Kediri); Sumatra (Palembang!, 

 Telokbetong, Solok, Taluk! Gunung Sahilan ! Kaju tanam, 

 Upper and Lower Langkat, Serdang !, Lake Toba!, Djambi!; 

 Borneo (rivers Kusan and Kapuas). Philippines, Siam, China. 



2. Clarias nieuhofi C. V. 



Clarias nieuhofii Cuvier & Valenciennes, Hist. Nat. Poiss. XV. 1840, p. 386. 

 Clarias pentapteriis Bleeker, Nat. Tijdschr. Ned.-Ind. II. 1851, p. 206. 

 Clarias Nieuhofii Bleeker, Atl. Ichth. II. 1862, p. 105. 

 Clarias nieuhofii Giinther, Cat. Brit. Mus. v. 1864, p. 20. (see syn.). 

 Clarias Nieiihofii Vinciguerra, Ann. Mus. Civ. Geneva, XVI. 1880, p. 166. 



B. 89; D. 87106; A. 6995; P.I. 9; V. 56. 



Very elongate. Height 8 9 a / 3 , head measured in the 

 ordinary way 7 9, measured to end of occipital process 

 5*/ 2 6'/ 2 - Length of head to gillopening nearly equalling 

 its greatest breadth, which is about midway between eye 

 and opercular border. Its profile from the dorsal nearly flat. 

 Occipital process not very prominent, triangular, its broad 

 base nearly thrice as long as its height. Occipital and frontal 

 fontanel nearly equal, the lastnamed far behind eyes. Eyes 

 ii 15. Eye-distance greater than mouthopening, less than 

 twice in head. Nasal barbels nearly reaching or surpassing 

 occipital fontanel, maxillary and mandibulary barbels nearly 

 or quite reaching to tip of pectorals, mental barbels exten- 

 ding on opercle. Head granular. Distance between dorsal 

 and occipital process 2 3 times in distance from snout to 

 end of occipital process. Bluntly rounded caudal more or less 

 completely united with anal and dorsal. Ventrals rounded, 

 extending on anal, about 3 times in length of head. Pectorals 

 short, rounded, not reaching vertical through origin of 



