24. MicROPus. 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 aster oblepa. 



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

 vi. p. 419. ' 



D. '4- A. ?=^. V. 1/4. 



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

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

 caudal fins variegated with brovmish. 



New Guinea ; rivers of Borneo. 



24. MICROPUS. 



Micropus, Grai/, Zool. Misc. p. 20. 



Caracantliu.s, Kriiyer, Ncdurhist. 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 prseorbital and the interoperculum with a strong spine, 

 (hrected downwards. Two separate or continuous dorsals, the first 

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

 ventrals rudimentary. Villiform teeth in the jaws only. Branchio- 

 stegals five ; no aperture behind the fourth gill. 



Pacific. 



1. Micropus maculatus. 



Micropus maculatus, Gray, I. c. 

 Cai-acanthus typicus, Kroyer, I. c. p. 264. 



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

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

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

 dotted all over vrith brown. 



Seas of Owaihi and Hao. 



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

 2. Micropus unipinna. 



Micropus unipinna, Gray, 1. r. 



D. i^. A. f/. V. 1/2. 



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



1,2 



