NEMATOGOBIUS.— GOBIOIDES. 41 



dorsal. Pectoral as long as head or slightly shorter. Ventral not 

 reaching vent, with well-developed anterior membrane. Caudal rounded, 

 as long as or a little shorter than head. Caudal peduncle 1-| to ] f times 

 as long as deep. Scales ciliated, 37-40 in longitudinal series, 10-11 in 

 transverse series between dorsal and anal. Yellowish brown above, 

 speckled with brown, with more or less distinct dark cross-bands ; dorsal 

 and caudal fins spotted with dark brown; a round blackish spot on 

 upper part of pectoral fin, near its base. 

 Total length 80 millim. 



Dr. W. J. Ansorge (C). 



rig. 23. 



Nemntogohius ansorrjii. 

 Type (A. M. C). 



4. GOBIOIDES. 



Lacop. Hist. Poi.ss. ii. p. 57G (1800) ; Guv. & Val. Hist. P,oiss. xil. p. 139 



(1837). 

 AmUyopus, Ciiv. & Val. t. c. p. 157 ; Giinth. Cat. Fish. iii. p. 133 (1861). 



Teeth conical, in a band, the anterior enlarged. Body much elongate 

 and compressed. A single very long dorsal fin, with the 6 or 7 anterior 

 rays simple ; anal also very long. Ventral fins united into a disk, 

 which is not attached to the belly. Scales absent or very small or 

 rudimentary. 



Coasts, estuaries, and fresh waters near the sea, within the tropics. — 

 One species in West Africa, closely allied to G, broussoneti, Lacep., from 

 the East Coast of S. America. 



