OF FISHES FROM LAKE TANGANYIKA, 91 
upper profile, slightly shorter than the eye, the diameter of which is 24 in length of 
head and equals 14 interorbital width; maxillary extending to between nostril and 
eye; two series of scales on the cheek; opercle naked. Gill-rakers short, 11 on lower 
part of anterior arch. Dorsal XIII 13 ; spines slender, increasing in length to the last, 
which is about 2 length of head and little shorter than the soft rays. Anal III 8; 
third spine slightly shorter than longest dorsals. Pectoral obtusely pointed, % length 
of head. Ventral reacuing vent. Caudal emarginate. Caudal peduncle 14 a slong 
as deep. Scales 35 5 ate le a Pale brown above, yellowish beneath; fins yellow ; 
a yound blackish spot on the hinder part of the spinous dorsal. 
Total length 60 millim. 
A single specimen. 
9. Kcropus MELANOGENYS Blgr. (Plate XIX. fig. 3.) 
Depth of body 5 to 53 times in total length, length of head 33. Snout long, with 
nearly straight upper profile, 13 diameter of eye, which is 4 times in length of head and 
equals or slightly exceeds interorbital width; maxillary extending to between nostril 
and eye; 3 series of scales on the cheek; deciduous scales on the opercle. Gill-rakers 
short, 12-13 on lower part of anterior arch. Dorsal XIII-XIV 17; spines slender, 
increasing in length to the last, which is about ? length of head; last soft rays 
produced, at least half length of head. Anal III 13; third spine 4 length of 
head. Pectoral pointed, a little shorter than head. Ventral reaching origin of anal. 
34, 
Caudal deeply emarginate. Caudal peduncle twice as long as deep. Scales 43-44 773 
lat. 1. = Grey above, white below; dorsal scales with a pale blue central spot; a 
blackish opercular spot ; chin and branchiostegal membrane blackish ; dorsal grey, with 
whitish streaks and spots, and a large oval blackish spot in the middle of the spinous 
portion; anal grey, streaked with whitish ; pectoral and caudal yellowish, the latter 
with crescentic dark bands; ventral blackish at the end. 
Total length 110 millim. 
Two specimens.—Native name: ‘“ Losorella.” 
10. Ecropus LONGIANALIS, sp. n. (Plate XIX. fig. 4.) 
Depth of body 5 times in total length, length of head 3. Snout long, with slightly 
convex upper profile, 14 diameter of eye, which is 33 times in length of head and 
nearly 14 interorbital width ; maxillary extending to between nostril and eye; 3 series 
of scales on the cheek; deciduous scales on the opercle. Gill-rakers short, 12 on 
lower part of anteriorarch. Dorsal XV 15; spines slender, increasing in length to the 
