10 MR. G. A. BOULENGER ON A COLLECTION 
The genus Lamprologus was known from a single species L. congoensis Schilthuis, 
discovered a few years ago in the Congo. The species now described raise the number 
to 7, distinguishable by means of the following key :— 
I. Caudal rounded or truncate. 
A. Anal with 10 spines. 
D. XIX 8; Se. 46 a depth of body 4 times in totallength. . . . . . I. L. fasciatus. 
D. XX-XXI1 6; Se. 32-33 s ; depth of body 22 to 2? times in total length. 2. L. compressiceps. 
B. Anal with 6 to 8 spines. 
D. XIX-XX 8-9; Se. 33-35 es depth of body 24 times in total length . 3. L. moorit. 
D, XVIII-XIX 8-10; Se. 42-53 mere depth of body 3? to 4 times in total length. 
4, L. congoensis. 
C. Anal with 5 spines. 
D. XX 8-9; Se. 36-40 ae 2 re of body 3} to 3? times in total length. 5. L. modestus. 
D. XVIII 10-11; Se. 90-95 depth of body 4 times in total length . 6. L. elongatus. 
a= = 
II. Caudal deeply notched, crescentic. 
D, XX-XXI 7-8; A. VI-VII 6; Se. 50-54 
“1 
ai : . L. furcifer. 
TELMATOCHROMIS, g. 0. 
Body more or less elongate; scales ctenoid. Jaws with a series of conical teeth, 
followed by a broad band of minute tricuspid teeth; lateral teeth small, conical. 
Maxillary exposed. Dorsal with 20 to 22 spines, anal with 6 or 7. Vertebre 33 
(16+17). 
This genus is closely allied to Lamprologus, differing in the small teeth forming a 
band behind the outer row being tricuspid instead of conical. It therefore stands 
somewhat in the same relation to Lamprologus as Tilapia does to Paratilapia. 
8. TELMATOCHROMIS VITTATUS, sp. n. (Plate II. fig. 2.) 
12 to 16 enlarged conical teeth, tipped with brown, in the outer row in each jaw. 
Depth of body 44 to 4% times in total length, length of head 4. Snout descending in 
a strong curve, as Jong as or a little longer than the diameter of the eye, which is 
3% to 4 times in length of head and equals interorbital width ; maxillary extending to 
eae the nostril; head naked, opercle with a few deciduous Reine Gill-rakers very 
short and tew. Dorsal XXI-XXII 8; spines increasing in length to the last, which 
equals } length of head; soft rays a little longer. Pectoral $ length of head. Ventral 
produced into a short filament, reaching origin of anal. Anal VII 5-6; spines 
increasing in length to the last, which age last dorsal. Caudal rounded. Caudal 
peduncle as long as deep. Scales 45-52 ° jg: lat. 1. — Yellowish, with a dark 
