24. MICROPTTS. 147 



space deeply concave. Caudal fin with a whitish band and a whitish 

 margin. 



Red Sea ; Indian Ocean and Archipelago ; Polynesia, 



a. Very large specimen : stuffed. He de France. 

 h. Very large specimen : stuffed. 



c. Very large specimen. Presented by the Zoological Society. 



d. Adult. From the Haslar Collection. 



e. Adult, Voyage of the ' Herald.' 



2. Synanceia asteroblepa. 



Richards. Voy. Sulph. Zool. Fishes, p. 69. pi. 39. f. 1-3 : Bleek. Borneo, 

 vi. p. 419. 



D.^. A.g. V.1/4. 



Head with ridges, without a large groove ; eyes directed upwards. 

 Blackish-green, dotted with blackish ; fins blackish, the pectoral and 

 caudal fins variegated with brownish. 



New Guinea ; rivers of Borneo. 



24. MICROPUS. 



Micropus, Gray, Zool. Misc. p. 20. 



Caracanthus, Kroyer, Naturhist. Tidsskr, i. 1844, p. 267. 



Head and body very compressed, with small tubercles ; snout very 

 short, truncated ; no scales ; several bones of the head strongly 

 armed ; the praeorbital and the interopercukim with a strong spine, 

 directed downwards. Two separate or continuous dorsals, the first 

 with eight (seven) spines, the anal with two ; no pectoral filament ; 

 ventrals rudimentary, ViUiform teeth in the jaws only. Branchio- 

 stegals five ; no aperture behind the fourth gill 



Pacific. 



1. lllicroptis maculatus. 



Micropus maculatus, Gray, I. c. 

 Caracanthus typicus, Kroyer, I. c. p. 264. 



D. 8|-?-. A.-. V. 1/2. 



I 11-12 12 / 



Two separate dorsal fins. The height of the body is one-half of 

 the length (without caudal) ; praeoperculum with five spines. Above 

 brown, with whitish spots ; below yellow, dotted with blackish, or 

 dotted all over with brown. 



Seas of Owaihi and Hao. 



a. Type of the species. Presented by Mr. S. Stutchbury, 



2. Micropus unipiiina. 



Micropus unipinna, Gray, I, c. 



D,?;j. A.H/. V.1/2. 



Dorsal fins continuous. The height of the body is one-half of the 



l2 



