MASTACEMBELUS. 



133 



and lateral line. Yellowish, with 12 elliptic, brown, dark-edged bands 

 across the back and another across the occiput ; a series of roundish 

 brown spots below the lateral line, alternating with the dorsal bands ; 

 dorsal and anal fins spotted with black and edged with white; pectoral 

 with two dark transverse streaks. 



Total length 260 millira. 



Lake Tanganyika. — Type in Congo Museum, Teivueren. 



Fig. 80. 



Mastacembdits ellipsifer. 



Type (A. M. C). |. 



23. MASTACEMBELUIS MARMORATUS. 



Perugia, Ann. Mus. Genova, (2) x. 1892, p. 9(i8 ; Bouleng. Tr. Zool. Soc. xv. 

 1898, p. 23, and Poiss. Bass. Congo, p. 495 (1901). 



Depth of body nearly 20 times in total length, length of head 7 to 

 9 times. Vent equally distant from head and from caudal. Rostral 

 appendage twice as long as eye ; mouth extending to below posterior 

 border of eye ; no pra?orbital spine ; two small prreopercular spines. 

 Dorsal XXX-XXXII 85 ; distance between first spine and head f 

 length of latter. Anal II 70. Caudal rounded. Scales very small, 

 17 between origin of soft dorsal and lateral line. Yellowish, with 

 brown network enclosing round spots disposed irregularly ; dorsal 

 yellowish white, spotted with dark brown, anal with a single series of 

 brown spots. 



Total length 230 millim. 



Lower Congo. — Types, in Genoa Museum, examined. 



24. MASTAOEMBELUS BREVICAUDA. 

 Bouleng. Ann. & Mag. N. H. (8) viii. 1911, p. 638. 



Depth of body 13 to 14 times in total length, length of head 7 to 8£ 

 times. Vent equally distant from head or praoperculum and from 

 caudal, its distance from head 3 to 3^ times length of latter. Snout 

 3 times as long as eye, ending in an appendage which is as long as eye ; 



