FISHES FROM LAKE TANGANYIKA MYERS 13 



Descnptioii. — Depth of body 5 in standard length, length of head 

 3.6. Head 2.56 times as long as broad; profile of snout descending 

 in a strong curve, but much less bluntly rounded than in T. vittatus ; 

 snout longer than eye, which is 3.G6 in length of head and nearly 

 a third larger than interorbital width; mouth larger than in T. 

 vittatus but not reaching to below eye. Front row of teeth of each 

 jaw composed of 8 to 10 enlarged, conical, and very slightly flat- 

 tened teeth. Backing these is a crowded band of four or five very 

 irregular rows of small tricuspid teeth. The posterior extensions 

 of both the upper and lower dentition form a single row of very 

 small teeth, which become progressively smaller and lose the two 

 outer cusps toward the end of the row. Gill rakers 5 or 6 very 

 short, stubby points, at and just before the angle of the upper and 

 lower limbs of the first gill arch. 



Dorsal XXI or XXII-S, spines increasing in length to the last, 

 which is not half the head length. Anal VII-5 or 6, the last spine 

 longer than last dorsal. Pectoral rather short, about as long as 

 head v/ithout opercle. Pelvics 1-5, the first soft ray produced, 

 reaching anus. Caudal rounded, with 7 branched rays above middle 

 and 7 below. Caudal peduncle 1.5 times as long as deep. 



Scales 36 to 38 to hypural joint. Lateral lines two, the upper very 

 irregular, with 26 scales, the lower with 6 or 7. Cheeks, opercles, 

 and nape as far as dorsal origin naked, as well as a strip between the 

 scales along the dorsal base and the lateral line, as far back as the fifth 

 or sixth dorsal spine. Body scales rather irregular in size and ar- 

 rangement, large on peduncle and middle of sides, growing smaller 

 and crowded above upper lateral line and on belly. Dorsal and 

 anal naked, caudal finely scaled nearly to its end. 



Ground color yellowish brown. Nape and forehead irregularly 

 mottled with dark brown. A dark-brown band down midline of 

 back, involving the base of the dorsal fin but not extending on the 

 peduncle or nape. Another brown longitudinal line extends from 

 above eye along upper part of sides, fading out under end of spinous 

 dorsal fin. A third dark-brown line extends from lower third of 

 eye back through the elongate opercular point, above the pelvic base, 

 and along the sides just below the midline, finally fading at caudal 

 base ; at the pectoral, this line involves an intense dark spot (but not 

 a bar) above the fin base, and on the posterior half of the side it 

 widens and breaks up into irregular, vertical, oblique patches. On 

 the snout an irregular, mottled pattern forms a line extending for- 

 ward from each ej^e and meeting in front ; another dark bar connects 

 the lower part of each eye with the mouth. Pectorals and pelvics 

 plain. Caudal faintly dusky. Lappets of spinous dorsal tipped 

 with dark. A narrow dark edging along entire border of anal ; this 

 mav be faint or strong. 



