238 



SILUKTDJE. 



7(5-78. Yg. 



79. Ad. 



80. Ad. 



81. Ad. 

 82-83. Yg. 



84. Hgr. 



85. Ad. 

 8G-90. Yg. 



91. Hgr. 



92. Ad. 



93. Yg. 



94. Yg. 



95. Yg. 



96-101. Hgr. &yg. 

 102-104. Yg., types 

 of C. longiceps. 



105. Ad. 



106. Ad. 



107-109. Ad. & hgr. 

 110. Type of 



C. macracanthus. 



Gondokoro, Balir et Gebel. 



Butyaba, L. Albert. 

 L. Albert Edward. 

 Gallaland, W. of Orao R. 

 Sire R., L. Abaia, 3000 ft. 



L. Chad. 



Guidimuni Pond, near Zin- 



der, Upp. Senegal. 

 Niger. 



Mureji, Upp. Niger. 

 Abo, Low. Niger. 

 Agberi, „ 

 Beiiue R., N. of Ibi. 

 Orah B., Lagos. 

 Boma, Low. Congo. 



Monsembe, Upp. Congo. 

 Upoto, „ 

 Upper Congo. 

 ? 



J. Petherick, Esq. (C). 

 L. Loat, Esq. (C). 

 J. S. Budgett, Esq. (P.). 

 Prof. J. E. S.Moore (C). 

 Dr. Donaldson Smith (C). 

 Mr. P. C. Zaphiro(C); 



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

 Capt. G. B. Gosling (P.). 

 Paris Museum (E.). 



Mr. J. T. Dalton (C). 

 J. S. Budgett, Esq. (P.). 

 Dr. W. J. Ansorge (C). 



H. L. Norton Traill, Esq. (C). 

 Major G. E. Bruce (P.). 

 M. P. Delhez (C). 



Rev. J. H. Weeks (P.). 

 Capt. Wilverth (C). 

 Brussels University. 

 Zoological Society. 



8. OLARIAS MELLANDI. 

 Bouleng. Ann. & Mag. N. H. (7) xvi. 1905, p. 644, and Proc. Zool. Soc. 1907, 

 p. 1074, fig. 



Depth of body 5J times in total length, length of head 3| times. 

 Head once and § as long as broad, feebly granulate above ; occipital 

 process angular ; frontal fontanelle knife-shaped, ^ length of head ; 

 occipital fontanelle very small, in advance of occipital process ; eye 

 3^- times in length of snout, h\ times in interorbital width, which 

 exceeds width of mouth and equals g- length of head ; band of prae- 

 maxillary teeth 4 times as long as broad ; vomerine teeth granular, 

 forming a large semielliptic patch, squarely truncate behind, its longi- 

 tudinal diameter 3 times that of the band of prsemaxillary teeth ; nasai 

 barbel -f length of head ; maxillary barbel § length of head, reaching 

 gill-opening ; outer mandibular barbel ■§• length of head. Gill-rakers 

 long, about 35 od anterior arch. Clavicles striated, distinct under the 

 thin skin. Dorsal 65, its distance from occipital process \ length of 

 head, its distance from caudal fin \ length of head. Anal 55, very 

 narrowly separated from caudal. Pectoral f- length of head, its spine 



