PETEESIUS. 235 



Tanga River, Usambara, German East Africa. — Types in Stockholm 

 Museum. 



1-2. Two o£ the types. Tanga. Prof. Sjostedt (C.) ; 



Prof. E. Lonnberg (P.). 



5. PETERSIUS LEOPOLDIANUS. 

 Bouleng. Ann. Mus. Congo, Zool. i. p. 90, pi. xxxvii. fig. 4 (1899), and Poiss. Bass. 

 Congo, p. 166 (1901). 



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

 Head longer than deep, with straight upper profile ; lower jaw projecting 

 beyond upper ; snout shorter than eye, which is 3 times, or a little less, 

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

 below anterior border of eye ; outer prtemaxillary teeth 4, almost on a 

 line with and alternating with the inner, 8 in number ; 8 teeth in lower 

 jaw. Gill-rakers long and closely set, 25-30 on lower part of anterior 



Fiff. 178. 



Peiersius leopoldianus. 

 Type (A. M. C). f. 



arch. Dorsal II 8, originating above base of ventral, at equal distance 

 from end of snout and from caudal, longest ray nearly as long as head. 

 Anal III 19-20. Pectoral | to |- length of head, not reaching ventral. 

 Caudal forked, with pointed lobes. Caudal peduncle a little longer than 

 deep. Scales 30-3 1 gr, 2 between lateral line and root of ventral. Olive- 

 grey above, silvery beneath, with a dark lateral band. 



Total length 90 millim. 



Upper Congo (Lake Leopold II.). — Types in Congo Museum, 

 Tervueren. 



1-3. Types. Kutu, L. Leopold II. M. P. Delliez (C). 



4. tokel. ,, ,, ,, 



6. PETERSIUS BRUMPTI. 

 Pellegr. Bull. Mus. Paris, 1906, p. 368. 



Form and coloration as in P. leopoldianus, but depth of body only 



