HYDEOCTOJSr. 



185 



4| times. Head 1 J to 2^ times as long as broad ; snout IJ to 2 times 

 diameter of eye, which is 4^ to 5^ times in length of head and 1^ to 2^ 

 times in interoibital width; mouth extending to below anterior border 

 of eye, maxillary to below centre of eye ; 5 large teeth in upper jaw, 

 4 in lower; suborbital and opercular bones rather strongly striated. 

 Gill-rakers very short, 10-12 on lower part of anterior arch. Dorsal 

 II 8-9, originating above ventral, at equal distance from end of snout 

 and from caudal, or a little nearer latter. Anal III 13-16, originating 

 at equal distance from base of ventral and from caudal. Pectoral as 



Pig. 142. 



Hydrocyon goliaih. 

 Type (A. M. C). f 



long as ventral, f to -f length of head. Caudal deeply forked, with 

 pointed lobes. Caudal peduncle once and f as long as deep. Scales 

 54-58 ^^^^, 3 between lateral line and scaly process at base of ventral. 

 Olive-brown above, silvery white on the sides and beneath ; more or 

 less distinct dark lines along the series of scales above lateral line ; 

 these lines absent in the young ; dorsal yellow or red ; adipose fin 

 black ; caudal edged with blackish, lower lobe red. 



Total length 1 metre or more. 



Congo. — Types in Congo Museum, Tervueren. 



1. One of the types. Manyanga. Capt. Wilverth (C). 



2. One of the types. New Antwerp. „ 



3. 4. Ad. & hgr. Monsembe. Rev. J. H. Weeks (P.). 

 5-6. Yg. Bolobo. Rev. G-. Grenfell (C). 

 7. Ad. Upper Congo. Brussels University. 



