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25- Paracrossochilus Popta. 



(PoPTA, Notes Leyden Mus. XXIV. 1902 — 04, p. 200). 



Elongate. Head conical. Dorsal outline somewhat convex. 

 Head and body ventrally flattened. Mouth inferior. Snout 

 prominent, rounded, anteriorly on each side with (males?) or 

 without a strong horny tubercle. Upper lip forms a broad fold, 

 covered by numerous round soft papillae, arranged in longi- 

 tudinal series towards its border, which is superficially crenu- 

 lated and overhangs a wide vestibulum of the mouth. The 

 lower lip forms a median prominent broad body, emarginated 

 anteriorly, rounded laterally, not separated from the isthmus 

 and covered with the same papillae as the upper lip. It has 

 on each side a lateral part, forming a soft, curved prolongation 

 connected with the upper lip, situated in a deep groove repre- 



Fig. 91. raracrossochilus vittatus (Blgr.) X ^V-i- 



Separate figure: view of ventral surface of head, a rostral, b maxillary barbel; 



/ lateral, tn median part of lower lip (//); til upper lip. 



senting the lateral part of a postlabial groove, where it is 

 folded. The upper lip carries a barbel, where it is connected 

 with the forward prolongation of the lower lip. A pair of rostral 

 barbels at the inner side of a lateral furrow, which is a forward 

 continuation of the postlabial groove. Jaws with sharp edges, 

 bordering the transverse gape of mouth, the lower one with a 

 symphysial tubercle. Eye with a free orbital margin. Dorsal 

 with 8 branched rays, simple rays not ossified, originating far 

 in advance of origin of ventrals. Anal short, with 5 branched 

 rays. Caudal bifurcate. Ventrals and pectorals horizontal. Scales 

 large. Lateral line straight, running in the middle of the tail. 

 Pharyngeal teeth 6.3 — 1.6. Branchial openings narrow. Gillmem- 

 branes broadly united to the isthmus. 



Distribution: The single known species from Borneo, in 

 mountain streams. 



