MASTACEMBELUS. 



139 



a space equal to 3£ to 4^ times its length. Snout 2 to 2h times as long 

 as eye, ending in an appendage shorter than latter ; mouth extending 

 to below posterior nostril or anterior border of eye : no prteorbital spine ; 

 a small pneopercular spine. Dorsal XXXVI-XXXIX 50-60 ; distance 

 between first spine and head f to \ length of latter. Anal II 50-60 ; 



Mastacembelus tanganicce. 

 Type. f. 



first spine extremely small. Caudal rounded. Pectoral j length of 

 head. Scales extremely small, about 20 between origin of soft dorsal 

 and lateral line. Brownish (discoloured), with traces of dark vertical 

 bars on the caudal region. 



Total length 170 millim. 



Lake Tanganyika. 

 1-6. Types. Near Ujiji. E. Coode Hore, Esq. (P.). 



Fig. 94. 



Mastacembelus longicauda. 

 Type. f. 



32. MASTACEMBELUS LONGICAUDA. 

 Bouleng. Ann. & Mag. N. H. (7) xx. 1907, p. 487. 



Depth of body 16 to 24 times in total length, length of head 9| to 

 11 times. Vent much nearer end of snout than caudal, its distance 



