176 THE TANGANYIKA PROBLEM. 



37. Julidochromis ornatus. — Blgr. 1898. (Fig., p. 185, upper.) 



Four or 6 canines in each jaw, tipped with brown. Depth of body 4 to 4} 



times in total length, length of head 3^ to 3J. Snout \h to twice as long as 



diameter of eye, which is 4k to 5 times in length of head and ik in interorbital width ; 



maxillary extending to below nostril ; cheeks naked ; opercles scaled. Gill-rakers 



very short and few. Dorsal XXII. -XXIV. 5 ; spines equal from eighth or tenth, J 



length of head ; longest soft rays i to § length of head. Pectoral about § 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. 



F & r D D 12 — 13 10—15 



Vellowish, 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 pnemaxillary groove is deep, and extends to the anterior third of the orbits, 

 the occipital crest is low and continued forward to the praemaxillary 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 prrecaudal 

 vertebra has a hjemal bridge. 



38. Paratilapia vittata. — Blgr. 1901. (Fig., p. 191, upper.) 



Depth of body 3^ to 3^ times in total length, length of head 2| to 3 times. Profile 

 of snout convex ; lower jaw projecting beyond the upper ; diameter of eye ii to 

 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 -| longest soft rays. Pectoral pointed, 

 about § 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£ times as long as deep. Scales with finely denticulated border, 



«.« — - — • lat. 1. . Olive above, whitish beneath ; a blackish stripe on 



JJ JJ 11 — 12 10 — 13 



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. 



