MASTACEMBELUS. 



iliO 



along the upper surface of the head, from betweefl the eyes, followed by 

 a vertebral series of spots ; a dark band on each side of the head, passing 

 through the eye, widening on the temple, and sometimes prolonged on 

 the body above the lateral line ; a series of large brown spots along the 

 base of the dorsal and anal fins; lower parts whitish, uniform or spotted 

 or marbled with brown. 



Total length '260 millim. 



Lake Nyassa and Upper Shire River. 

 Upper Shire R. 



1-2. Types. 

 3-5. Ad. & yg. 



6. Hot. 



7-8. Ad. & lior. 



Fort Joliiistoii. 



S.W. Coast of L. Nyassa. 



L. Nyassa between Koii- 



dowe and Karanoa. 



A. Wliyte, Esq. (C). ; 



Sir H. H. Johnston (P.). 

 Dr. Percy Kendall (C.).; 



Sir H. H. Johnston (P.). 

 Universities Mission. 

 A. Whyte, Esq. (C.) ; 



Sir H. H. Johnston (P.). 



Fig. 82. 



JIasiacembelus shiranus. 

 Type. |. 



18. MASTAt'EMBELUS NIGROMARGINATUS. 

 Bouleiig. Tr. Zool. Soc. xv. 18D8, p. 23. 



Depth of body 12 to 15 times in total length, length of head 7 to 

 8^ times. Vent slightly nearer caudal than end of snout, its distance 

 from head 2f to 3 times length of latter. Snout 3 to 4 times as long 

 as eye, ending in an appendage which is 1^ (o 2 times as long as eye ; 

 mouth extending to below anterior border or anterior third of eye ; 

 no prseorbital or prseopercular spines. Dorsal XXVII-XXIX 95-100 ; 

 spines increasing in length to the last, which is 1^ length of eye ; 

 distance between first spine and head ^ length of latter. Anal 11 85-90. 

 Caudal rounded. Pectoral f length of head. Scales very small, 23-25 



VOL. IV. ^ 



