138 



MASTACEMBELID.E. 



Pectoral 3| times in length of head. Purplish grey, with a dark band 

 on the side of the head, and 16 or 17 oblique dark bands, directed 

 downwards and forwards, on the side of the body. 



Total length 33-5 millim. 



Ituri River, Congo. — Type in Vienna Museum. 



;50. MASTACEMBELUS TyEXIATUS. 



Bouleng. Ann. & Miijr. N. H. (7) vii. IDOl. p. 6, Poiss. Ba's. Congo, y,. 498 (1901), 



and Ti-. Zool. Soc. xvi. 1901, p. IGO, ],1. xx. fig. 4, and xvii. 190(3, p. .576. 



Depth of body 13 times in total length, length of head 6^ times. 

 Vent equally distant from head and from caudal, its distance from head 

 3 times length of latter. Snout twice as long as eye, ending in an 



Mastacembelus tceniatus. 

 Type (Tr. Z. S. 1901). 



appendage as long as latter ; mouth extending to below anterior border 

 of eye; no preeorbital or prajopercular spines. Dorsal XXXIII- 

 XXXV 85 ; last spine a little longer than ej'e ; distance between first 

 spine and head ^ length of latter. Anal II 85. Caudal rounded. 

 Pectoral j length of head. Scales extremely small, 25 between origin 

 of soft dorsal and lateral line. Yellowish ; a brown lateral band, from 

 the end of the snout, through the eye, to the caudal region, where it 

 widens, becomes sinuous, and bears some yellow spots. 



Total length 105 millim. 



Lake Tanganyika. 



1. Type. N. end of L. Tanganyika. Prof. ,T. E. S. Moore (C). 



2. Yg. Niamkolo Bay. ]>r. W. A. Cunnington (('.). 



3. Yg. Kasawa. „ 



;}1. MASTACEMBELUS TANGANIC^. 



Giinth. Proc. Zool. Soc. 1893, p. 629, and Ann. & Mag. N. H. (6) xvii. 1896. 

 p. 397 ; Bouleng. Poisf!. Bas^s. Congo, p. 496 (1901). 



Depth of body 10 to 14 times in total length, length of head 7 to 

 7^ times. Vent nearer caudal than head, from which it is separated by 



