252 



CHAEACINID^. 



extremity of upper jaw and 3 at extremity of lower ; naked part of cheek 

 about double the width of suborbital ; upper surface of head rugose with 

 fine striae. Gill-rakers extremely short, rudimentary. Dorsal III 12-14, 

 originating immediately behind vertical of base of ventrals, equally 

 distant from occiput and from caudal, longest ray f to f length of head. 

 Anal III 11-14. Pectoral about ^ length of head, as long 

 as ventral. Caudal nearly entirely covered with small scales, 

 deeply forked, lobes rounded or obtusely pointed. Caudal 

 peduncle If fo 2 times as long as deep. Scales 91-112 

 10-12 between lateral line and root of ventral. 



14-16 



14-ie. 

 Silvery, 



back pale olive ; a greenish golden streak above lateral line ; 



blackish spots and marblings sometimes present on back and 



sides ; fins whitish, except the caudal, which is pale yellow 



with more or less numerous black spots. 





^^liii 



laldhi/ohorvs hesse. 

 White Nile (F. N.). |. 



Total length 190 millim. 



Lower Nile to White Nile ; Chad Basin. — Types in Paris Museum. 



J. Petherick, Esq. (P.). 



1-2. Types of 



/. microlepis. 

 3. Ad. 

 4-6. Ad. 



7. Ad. 



8. Ad. 



9-23,24. Ad.&hgr. Fashoda, 

 25. Skel. 



Khartum. 



Between Khartum and 



Sobat. 

 Groz Abu Gumah, 



White Nile. 

 North of Kaka, W hite Nile. 



A. L. Butler, Esq. (P.). 

 J\1r. P. C. Zaphiro(C.); 



W. N. McMillan, Esq. (P.). 

 L. Loat, Esq. (C). 



