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containing the hindwards prolonged commissure of the lips. 

 Rostral and maxillary barbels smaller than eye. Origin of dorsal 

 opposite to 8th scale of lateral line and separated by lo scales 

 from occiput. Dorsal emarginate, the anterior prolonged rays 

 longer than head. Anal with the anterior rays prolonged, 

 reaching base of caudal and equalling the height of dorsal; 

 its origin opposite to 22nd scale of lateral line, far behind dorsal. 

 Ventrals and pectorals subequal; ventrals reaching anus, their 

 origin separated by 3'/^ series of scales from the nth scale of 

 lateral line and opposite to y^ branched ray of dorsal. Pectorals 

 equal to head. Caudal deeply emarginate, longer than head. 

 Least height of caudal peduncle 1.7 in length of head, and 

 1.3 in length of peduncle; surrounded by 16 scales. After 

 Bleeker a diffuse brownish band from head to caudal. [Des- 

 cription made after our specimen of about 260 mm., the largest 

 specimen known ; the type of Osteochihis Jentinkii Popta in 

 the Leiden Museum, seen by us]. 



N o m. i n d i g. : Lucas (Malay. Batavia) ; Tebulit (Bongan). 



Habitat: Sumatra (Sidjungdjung !) ; Java (Batavia) ; Borneo 

 (river Bongan, one of the tributaries of the river Kapuas!). 



4. Labeo (Labeo) pleurotaenia (Blkr.). 



Lobocheilos pleurotaenia Bleeker, Nat. Tijdschr. Ned. Indie IX. 1855, P- 267. 

 Diplocheilichthys pleurotaenia Bleeker, Ichth. Arch. Ind. Prodr. II. Cyprini i860, 



p. 143. — Atl. Ichth. III. 1863, p. 55. 

 Labeo pleurotaenia Giinther, Cat. Brit. Mus. VII. 1868, p. 58 (sine synon.). 



D. 3.10— II ; A. 3.5; P. 1. 14— 15 ; V. 1.8; L. 1. 34; L. tr. i . 



6 



Height about 3.8, about 5 in length with caudal; head 

 3'75 — 4^4^ nearly 5 — 6 in length with caudal. Eye about 3 — 4, 

 in adult specimens much shorter than snout, i'/4 — 2 in inter- 

 orbital space. Snout much swollen, prominent, anteriorly with 

 numerous conspicuous pores. Its pendulous part, without a 

 lateral lobe, covering the smooth upper lip, which is continuous 

 with the thick lower lip, provided with only one series of 

 very small papillae '). Maxillary barbels much longer than rostral 

 ones, about equal to eye. Dorsal emarginate, about equal to 



l) This is according to Bleeker's description of this species; in his "Prodromus" 

 he says of the genus Diplocheilichthys^ which is made for the present species: 

 "labium inferius crenulatum" but, on the contrary in his "Atlas Ichth." "labia 

 nee papillata nee fimbriata". 



