192 
THE TANGANYIKA PROBLEM. 
dorsals. Caudal with deep crescentic notch. Caudal peduncle 2), as long as deep. 
6-7 ^-S 2 
Scales 55 — — ; lat. 1 26 . Pale brown above, yellowish beneath ; a small dark 
13—15 
brown opercular spot ; a round brown spot on caudal peduncle at root of caudal 
fin ; dorsal fin greyish, the soft portion with round white spots, other fins yellowish. 
Total length, 175 millim. 
Described from a single specimen. Native name, “ Murungi.” 
59. Trematocara marginatum. — Blgr. 1899. (Fig., p. 179, upper.) 
Depth of body 3^ times in total length, length of head 2\ to 3. Snout with 
curved upper profile, shorter than the eye, which is 2 h in length of head and 
exceeds interocular width ; mouth extending to below anterior border of eye ; cheek 
naked ; a few deciduous scales on the opercle ; nasal, frontal, prae- and suborbital, 
prseopercular, and mandibular bones with very large and deep cavities separated by 
narrow septa and covered with a thin skin. Gill-rakers short, 10 on lower part of 
anterior arch. Dorsal X. 11 ; spines \ length of head, a little shorter than the 
longest soft rays. Pectoral acutely pointed, as long as head. Ventral reaching 
origin of anal. Anal III. 10; third spine nearly as long as dorsals. Caudal with 
deep crescentic notch. Caudal peduncle i£ as long as deep. Scales cycloid, 30$ ; 
lateral line reduced to a few (six or seven) short tubes in the upper series. Pale 
brownish above, white beneath ; a bluish lateral stripe ; fins yellowish, dorsal and 
anal edged with blackish. 
Total length, 63 millim. 
Described from two specimens. Native name, “ Lilowe.” 
60. Trematocara unimaculatum. — Blgr. 1901. (Fig., p. 201, upper.) 
Depth of body 3 to 3^ times in total length, length of head 2 % to 2f times. 
Snout with curved upper profile, as long as or a little shorter than the eye, the 
diameter of which is nearly double interorbital width and contained 3 to 3] times 
in length of head ; mouth extending to below anterior border of eye ; cheek naked ; 
a few deciduous scales on opercle ; nasal, frontal, preeorbital, suborbital, prce- 
opercular, and mandibular bones cavernous, with large cavities covered with thin skin 
and separated by narrow septa. Gill-rakers short, 17 on lower part of anterior arch. 
Dorsal X. -XII. 9-1 1 ; spines increasing in length to the sixth or seventh, which 
measures i length of head ; soft rays scarcely longer. Pectoral very pointed, as long 
as or a little longer than the head. Ventral reaching origin of anal. Anal III. 7-8 ; 
third spine nearly as long as dorsals. Caudal deeply notched, crescentic. Caudal 
peduncle nearly twice as long as deep. Scales 30-321); lat. 1. 5-14. Silver)’, 
brownish above, a large rounded black spot on posterior third of spinous part of 
dorsal, rarely followed by a second. 
Total length, 120 millim. 
Described from several specimens from the Usambura Market. 
