568 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



In Hora's noteworthy paper, all the very elongate, compressed, 

 Oriental gobies characterized by long dorsal and anal fins fully united 

 to or closely contiguous to the caudal fin, ventral fins either completely 

 united to form a disk or wholly or partly separated, minute eyes, 

 absent or more or less rudimentary scales, and very oblique mouth, are 

 placed in the Taenioididae, with two subfamilies recognized, the 

 Taenioidinae and the Trypaucheninae, the latter given full family 

 rank by Jordan (1923), Herre (1927), and others. The separation of 

 these subfamilies is based largely on the possession by the Trypau- 

 cheninae of a pouchlike cavity over each opercle, the cavity being 

 lacking in the Taenioidinae. 



The locally represented genera number 5 and may be identified as 

 follows : 



la. No pouchlike cavity over each opercle (Taeniodinae). 



2a. Barbels present on tip of low^er jaw ; outer rove of teeth in both jaws re- 

 curved canines; branched dorsal rays 38 to 52; branched anal rays 37 



to 49 Taenioides 



2&. Barbels absent on lower jaw ; branched dorsal rays 29 to 32 ; branched anal 

 rays 27 to 35. 

 3a. Mouth large, moderately oblique, chin not heavy and dilated; teeth in 

 upper jaw in 2 rows, in lower jaw in 2 or more rows, the outer row en- 

 larged, long, pointed, inward-curved ; dorsal fin with 6 or 7 simple rays. 



Brachyamblyopus 

 3&. Mouth small, very oblique, chin heavy and dilated ; teeth in both jaws in 

 2 rows, the outer row long, pointed, slender, wide-set, and depressible, 

 the inner row minute ; dorsal fin with 6 to 10 simple rays. 



Caragobioides 

 16. Pouchlike cavity over each opercle present (Trypauchkninae). 



4a. Ventral fins completely united into a funnel-shaped disk Trjrpauchen 



4&. Ventral fins separated to their base Trypaucheniclithys 



Subfamily Taenioidinae 



Genus TAENIOIDES Lacepede 



Taenioides Lacep£:db, Histoire naturelle des poissons, vol. 2. p 532, 1800. (Type, 

 Taenioides hermannii Lacepede.) 



The genus Taenioides, with the haplotype T. hermannh' Lacepede, 

 not T. hermannianus as stated by Bleeker (1874 [453] ), Jordan (1917, 

 pt. 1, p. 57), and Koumans (1931), has four recorded local species 

 and probably several more remain to be detected in the fresh waters 

 of Thailand. The greatly elongate form might to the uninitiated give 

 the impression that these fishes are eels. Their large mouth, formi- 

 dable array of teeth, and bulldoglike lower jaw are combined with a 

 vicious disposition. 



