233 



4 



D. 3.8; A. 3.5; P. 1.14 15; V. 1.8; L.I. 33 34; L. tr. _i_. 



5 



Height 4 ! / 2 5> 5'/2 to more than 6 ! / 2 in length with caudal. 

 Head 4 3 / 4 5 2 / 5 , 67 in length with caudal. Eye 34, i ! / 2 

 in snout, i ! / 3 2 m interorbital space. A pair of rostral barbels, 

 shorter than the eye. No maxillary barbels. Origin of dorsal 

 opposite to io th scale of lateral line, separated by about 9 

 scales from occiput. Dorsal slightly emarginate, its height 

 somewhat more than length of head. Anal opposite to 2y& 

 scale of lateral line, its anterior rays somewhat prolonged, shorter 

 than head. Pectorals and ventrals subequal. Ventrals reaching 

 anus, their origin separated by 3 series of scales from the 

 12 th scale of the lateral line. Pectorals about equal to head 

 or longer. Caudal deeply forked, much longer than head. Least 

 height of caudal peduncle about i 4 / 5 in length of head and 

 in its own length, surrounded by 16 scales. A dark band along 

 the middle of the body. In the var. nigriloba the lower lobe 

 of the caudal has a large black patch. Length 160 mm. 



Nom. indig. : Lukas (Malay. Batavia); Djedjet (Sundan.); 

 Tulum (Bongan); Ale Ong (Bo). 



Habitat: Sumatra (Padang, Lahat-Enim, Palembang, Taluk!, 

 Upper Langkat, Deli) ; Java (Bantam [British Museum], Batavia, 

 Buitenzorg!, Tjampea, Lebak, Tjandjur, Parongkalong, Sura- 

 baya, Ngantang); Borneo (river Kapuas: Sintang, Sebruang, 

 river Sibau, Raun, Mandai, Bongan, river Bo affluent of river 

 Mahakam). Malacca. 



2. Crossochilus gnathopogon n.sp. [Fig. 95, 96, pag. 231, 232]. 



Tylognathus hispidus Max Weber, Zool. Ergebn. Reise Niederl. Ost-Indien III. 

 1894, p. 421 (nee C.V.). 



4-51 

 D. 3.8; A. 3.5; P. 1.14; V. 1.8; L.I. 34 35; L. tr. i . 



5 

 Height 3.6 4, 4.8 5.3 in length with caudal. Head 5,6.5 6.7 



in length with caudal. Eye 3.1 3.6, shorter than snout, 1.5 

 or less in the interorbital space. A minute barbel behind 

 the corner of the mouth. Origin of dorsal opposite to io th 

 scale of lateral line, separated by 9 or 10 scales from occiput. 

 Dorsal with the anterior rays prolonged, their height somewhat 

 less than height of body. Anal slightly concave, the anterior 

 rays somewhat shorter than head, its origin opposite to 22d 

 scale of lateral line. Pectorals and ventrals subequal; ventrals 



