THE TANGANYIKA PROBLEM. 
76 
37. Julidochromis ornatus. — Blgr. 1 898. (Fig., p. 1 85, upper.) 
Four or 6 canines in each jaw, tipped with brown. Depth of body 4 to 4 V 
times in total length, length of head 3$ to 3.$. Snout i 4 to twice as long as 
diameter of eye, which is 4.4 to 5 times in length of head and i 4 in interorbital width ; 
maxillary extending to below nostril ; cheeks naked ; opercles scaled. Gill-rakers 
very short and few. Dorsal XX 1 1 . -XXIV. 5 ; spines equal from eighth or tenth, \ 
length of head ; longest soft rays 4 to if length of head. Pectoral about if length of 
head. Ventral produced in a filament, reaching origin of anal. Anal VIII. -IX. 
4-6 ; spines increasing in length to the last, which equals | length of head. Caudal 
6—7 
26 — 29. 
rounded. Caudal peduncle as long as deep. Scales 45-50 ' ; lat. 1. 
r r J 12—13 10—15 
Yellowish, with three dark brown stripes on each side, the lower from the end 
of the snout to the base of the caudal, the upper along the base of the dorsal ; a 
large round dark brown spot on the base of the caudal ; a small black spot at the 
base of the pectoral ; anal edged with brown ; caudal brown. 
Total length, 85 millim. 
Described from five specimens from Mbity Rocks. 
The premaxillary groove is deep, and extends to the anterior third of the orbits, 
the occipital crest is low and continued forward to the premaxillary groove ; 
parietal crests are present, but very feeble ; the chain of suborbital bones is replaced 
by a ligament ; the mandible is very massive, the lower surface flat, projecting as 
a keel on the sides. The ribs are inserted on a step of the transverse processes, at a 
short distance from the centre ; all bear epipleurals ; only the last pnecaudal 
vertebra has a haemal bridge. 
38. Paratilapia vittata. — Blgr. 1901. (Fig., p. 191, upper.) 
Depth of body 3J to 3.4 times in total length, length of head 2?, to 3 times. Profile 
of snout convex ; lower jaw projecting beyond the upper ; diameter of eye 1.4 to 
1 if times in length of snout, 4 to 4} times in length of head, and equal to interocular 
width ; maxillary extending to below anterior border of eye ; teeth in 3 or 4 
rows, the outer much larger than the others ; 3 or 4 series of scales on the 
cheek ; large scales on the opercle. Gill-rakers short, 10 to 12 on lower part of 
anterior arch. Dorsal XV. -XVI. 8-9; spines subequal from the seventh or eighth, 
which measures about \ length of head and if longest soft rays. Pectoral pointed, 
about if length of head. Ventral reaching vent or origin of anal. Anal III. 8-9; 
third spine longest, as long as middle dorsal spines. Caudal feebly emarginate. 
Caudal peduncle i 4 times as long as deep. Scales with finely denticulated border, 
33-35 ; lat. 1. — — — . Olive above, whitish beneath ; a blackish stripe on 
11 — 12 10 — 13 r 
each side above the upper lateral line, and a second from the opercle to the root of 
the caudal fin, passing over the lower lateral line ; dorsal, anal, and caudal fins 
greyish or blackish, ventrals black in the males. 
Total length 120 millim. 
Described from several specimens. 
