STEATOCRANUS. 283 



9. STEATOCRANUS. 

 Boulen^, Ann. Mus. Congo, Zool. i. p. 52 (1899), Proc. Zool. Soc. 1899, p. 141, 

 and Poiss. Bass. Congo, p. 481 (1901) ; Pellegr. Mem. Soc. Zool. France, xvi. 

 1904, p. 350. 

 Body moderately elongate ; scales cycloid ; two incomplete lateral 

 lines. Two widely separated series of notched teeth in both jaws, the 

 outer larger, with one or two pairs of larger, truncate, incisor-liUe 

 teeth at the symphysis ; maxillary exposed. An adipose crest or 

 swelling along the vertex and occiput. Dorsal with 19 or 20 spines, 

 anal with 3. Vertebrae 30 (16 + 14). 

 Congo. 



1. STEATOCRANUS GIBBICEPS. 



Boulcng. 11. cc, Ann. pi. xxviii. fig. 1 ; Pellegr. I.e. 



Depth of body 3^ to 3f times in total length, length of head 3 times. 



FiiT. 193. 



Steaiocranus yibhiceps, 

 Type(A. M. C). |. 



Head twice as long as broad ; snout as long as broad, with slightly 

 convex upper profile, nearly twice as long as eye, which is 4^ to 5 times 

 in length of head and equals interorbital width ; mouth extending to 

 below nostril; cheek naked. Gill-rakers very short, 7 on lower part of 

 anterior arch. Dorsal XIX-XX 8 ; last spine longest, f length of head ; 

 soft rays more or less produced, the longest sometimes exceeding length 

 of head. Anal III 6. Pectoral f to | length of head. Ventral not 

 reaching vent. Caudal rounded. Caudal peduncle as long as deep. 

 Scales 32-35 j^; lateral lines jy_\i. Brown, darker above, the scales 

 with darker edges. 



Total length 80 millim. 



Congo. — Types in Congo Museum, Tervueren. 



1. Type. Matadi. Capt. Wilverth (C). 



i. A.l. Stanley Pool. M. De ]\Ieiise (C.). 



