MARCUSENIUS. — STOMATORHINUS. 87 



Caudal peduncle 3 times as long as deep, | length of head. 61—68 

 scales in lateral line, gqjj in transverse series on body, Ttru in transverse 

 series between dorsal and anal, 12 round caudal peduncle. Yellowish. 



Total length 260 millim. 



Congo. — Types in Congo Museum, Tervueren. 



1. Ad., one o£ the types. Matadi, Lower Congo. Capt. Wilverth (C). 



2. Ad., „ Upoto, Upper Congo. ,, 



3. Hgr. Upper Congo. Brussels University. 



5. STOMATORHINUS. 



Bouleng. Ann. Mus. Congo, Zool. i. p. 9 (1898), Proc. Zool. Soc. 1898, p. 799, 

 and Foiss. Bass. Congo, p. 83 (1901;. 



Teeth in the jaws bicuspid (7-10 upper, 8-10 lower); minute conical 

 teeth on the parasphenoid and on the tongue; mouth inferior, in 

 advance of the eyes. Nostrils widely separated, superposed, the lower 

 (posterior) close to the mouth. Body short; ventral fins nearer the 

 pectorals than the anal. Dorsal and anal fins subequal in length. 

 Vertebra: 39 (14+25). 



Tropical Africa. 



Synopsis of the Species. 



I. Caudal peduncle 3^ times as long as deep, \ to \ length of head. 

 L. 1. 52-55 ; 16 scales round caudal peduncle ; 



depth of body 3-3^ times in total length . 1. S. puncticulatus, Blgr., p. 88. 



II. Caudal peduncle 2\ times as long as deep, g to § length of head. 

 L. 1. 50-53 ; 16 scales round caudal peduncle ; 



depth of body 3|-3g times in total length . 2. S. walkeri, Gthr., p. 88. 

 L. 1. 51-53; 14— 1G scales round caudal 

 peduncle ; depth of body 4^-5 times in 

 total length 3. S. humilior, Blgr., p. 89^ 



III. Caudal peduncle twice as long as deep, i length of head. 

 L. 1. 48 ; 12 scales round caudal peduncle ; 



depth of bodj' 3^ times in total length. . 4. S. corned, Blgr., p. 90. 



L. 1. 54-60 ; 20-22 scales round caudal 

 peduncle ; depth of body 3H-4.1 times in 

 total length 5. S. pohjlepis, Blgr., p. 91. 



L. 1. 48-53 ; 10-18 scales round caudal 

 peduncle ; depth of body 4-4£ times in 

 total length G. »S', microps, Blgr., p. 92. 



