ECTODUS.— ENANTIOPUS. 



447 



is 21 to 2f times in length of head and exceeds interorbital width ; 

 mouth extending to between nostril and eye; 2 or 3 series of scales on 

 the cheek. Gill-rakers short, 11-12 on lower part of anterior arch. 

 Dorsal XIII-XIV 13-15 ; spines weak, subequal from the eighth or 

 increasing in length to the last, which measures f to i length of head ; 

 soft rays not or but slightly longer than the spines. Anal III 8-11.' 

 Pectoral as long as or a little longer than head, extending to vertical of 

 origin of anal. Ventral reaching vent or a little beyond. Caudal with 



Fig. 305. 



Ectodus descampsii. 

 Moliro (Tr. Z. S. 1899). f. 



deep crescentic notch. Caudal peduncle IJ to 1| times as long as deep. 

 Scales finely denticulate, 34-38 jy^jj ; lateral lines x^rra- Brown above, 

 yellowish beneath ; a dai'k spot sometimes present on the posterior part 

 of the spinous portion. 



Total length 95 millim. 



Lake Tanganyika. — Type in Congo Museum, Tervueren. 

 1-2. Ad. Sumbu. Dr. W. A. Cunnington (C). 



3. Skel. i> ); 



4. Ad. Uvira. Dr. L. Stappers (C). 



21. ENANTIOPUS. 



Edodm, part., Bouleiig. Tr. Zool. Soc. xv. 1898, p. 21, and Poiss. Bass. Congo, 



p. 437 (1900) ; Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 367. 

 Enantiopus, Bouleng. Tr. Zool. Soc. xvii. 1906, p. 569. 



Body elongate ; scales ctenoid ; two incomplete lateral lines. Teeth 

 small, conical, in two series, those of the outer series of the lower jaw 

 directed outwards, nearly perpendicular to the inner. Maxillary nearly 

 entirely folding under the prseorbital. A large papillose pad on each 

 side of the pharynx, forming a strong protuberance in front of the upper 

 part of the branchial arches. Dorsal with 13 to 15 spines, anal with 3. 



