ART. 7 NEW SIAMESE FISHES SMITH 37 



six weeks. It usually remained either in the bottom well concealed 

 among particles of sticky mud, or beneath the roots of a small natant 

 water plant. 



POGONOGOBIUS, new genus 



Body compressed; head greatly depressed, broad and flat, with 

 small eyes widely separated; mouth large, nearly horizontal, lower 

 jaw slightly projecting, gape extending to a point under eye and 

 jaws projecting backward almost to preopercle; small teeth, in 

 several rows in each jaw, none canine or markedly enlarged; tip of 

 tongue rounded; about eight short, fleshy barbels on each side of 

 snout, one large pair on chin near median line and one pair on each 

 side of the lower jaw in line with the tubular anterior nostrils; body 

 covered with medium-sized ctenoid scales; predorsal region covered 

 with smaller, crowded scales to a point half way between dorsal fin 

 and anterior margin of eyes ; opercles and cheeks naked ; conspicuous 

 papillary ridges of mucous pores on opercles, cheeks, snout, and 

 under side of lower jaw; all fins rather small; dorsal spines 6, dorsal 

 and anal soft rays 9 or 10. 



This genus has as its only known representative the species de- 

 scribed from Bombay by Day under the name of Gohius 'planifrons.* 

 Day's description makes no mention of the barbels on lower jaw, but 

 his figure ^ shows them. This species is represented in the collection 

 of the Siamese Department of Fisheries by 2 specimens 6.5 and 7.5 

 cm, long from the Menam Chao Phya at Paknam, Central Siam, 

 June 3, 1927, and 3 specimens 6.8, 8.0, and 8.7 cm. long from the 

 Chantabun River at Lem Sing, Southeastern Siam, July 17, 1928. 

 Day's type was about 10 cm. long. 



EUGNATHOGOBIUS, new genus 



This genus is characterized by an enormous mouth, the maxillary 

 being more than two-thirds the length of head and extending nearly 

 to the preopercle. Associated with this feature are a moderately 

 elongate, compressed body; broad, depressed head; broad snout; 

 small eyes covered with skin; small teeth in several rows in each 

 jaw; emarginate tongue; medium sized, thin ctenoid scales on body; 

 head naked; two well-separated dorsal fins, the first with only 5 

 rays, the second with 7 branched rays ; and anal fin with 6 branched 

 rays. 



EUGNATHOGOBIUS MICROPS, new species 



Description. — Form elongate, dorsal and ventral outlines similar; 

 body strongly compressed posteriorly, the depth 4.5 in standard 

 length and 1.5 in head; head large, broad, and strongly depressed, 



* Proceedings Zoological Society of London, 1873. 

 » Fishes of India, pi. 63, flg. 9. 



