FROM LAKE TANGANYIKA. . 19 



mouth extending to below anterior border of ej'e ; teeth very 

 small, in 2 or 3 series ; 2 series of scales on the cheek, width of 

 scaly part j diameter of eye. Gill-rakers rather long, 16 or 17 

 on lower part of anterior arch. Dorsal XI-XII 13-14; spines 

 subequal from the sixth oi- seventh, which measures | to | length 

 of head, and equals longest soft rays. Anal III 9 ; third spine 

 f length of head. Pectoral as long as head, extending a little 

 beyond vertical of origin of anal. Ventral produced into a fila- 

 ment, which extends beyond origin of anal. Caudal with deep 

 crescentic notch. Caudal peduncle 1| times as long as deep. 

 Scales denticulate, 34-36 |p^ ; lateral lines ^^, the upper 

 extending to the caudal peduncle, or to the root of the caudal. 

 Pale brown above, white beneath ; 4 to 6 dark spots on each side, 

 the fii-st on the gill-cover, the last at the base of the caudal ; 

 dorsal and anal usually Avith dark spots or a dark longitudinal 

 band, the rays tipped with black. 



Total length 63 millim. 



Several specimens from the Lukuga River. 



Closely allied to P. deivindti Blgr. 



Lamprologus dhonti. 



Depth of body 3| to 3| times in total length, length of head 

 2i to 3 times. Head twice as long as broad, with convex upper 

 profile ; snout rounded, Ig times as long as eye, which is 4 to 

 4^ times in length of head and equals interorbital width ; mouth 



Text-figure 3. 



Liiii>pi-i)loffi s d'loiiti. 



not extending to below anterior border of eye ; 6 rather large 

 canine teeth in front of upper jaw and 4 in lower, followed by a 

 moderately broad band of minute teeth ; head entirely naked. 

 Gill-rakei's very short, 6 on lower part of anterior arch. Dorsal 

 XVII-XYIII 8-9 ; spines increasing in length to the last, which 

 is a little less than g length of head ; longest soft luy | length of 

 head. Anal V-Vll 6-7 ; last spine |- length of head. Pectoral 



