MASTACEMBELUS. 



129 



along the upper surface of the head, from between 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 

 tbe 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 bi*own. 



Total length 260 millim. 



Lake Nyassa and Upper Shire River. 

 1-2. Types. 



3-5. Ad. & 



71 



6. Hgr. 



7-8. A J. & hgr. 



Upper Shire R. 



Fort Johnston. 



S.W. Coast of L. Nyassa. 



L. Nyassa between Kon- 



dowe and Katanga. 



A. Whyte, 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. 







Mastacembd as shiranus. 

 Type. f. 



18. MASTACEMBELUS NIGROMARGINATUS. 

 Bouleng. Tr. Zool. Soc. xv. 1808, 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 2| to 3 times length of latter. Snout 3 to 4 times as long 

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

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

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

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

 distance between first spine and head J length of latter. Anal II 85-90. 

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



VOL. iv. a 



