42 Dr. E. Lénnberg on 
(without caudal). Length of head contained as nearly as 
can be three times in total length. Diameter of eye about two 
thirds the length of the snout. Interorbital space as broad 
as the snout is long. Diameter of eye contained nearly four 
times in length of head. Nineteen gill-rakers on lower part 
of anterior arch. 
The body is high and broad and the outline of the forehead 
forms an even but steep curve from the origin of the dorsal to 
the snout. 
Tilapia (Gephyrochromis) Linnellit, sp. n. 
Length of head longer than greatest depth of body; the 
former is contained about 2# times in total length (without 
caudal), or represents 414 °/, of the latter measurement in 
the female (?); but in the male (?) the length of head is con- 
tained about 2% times in total length, or represents more 
exactly 43°2 °/, of the latter. Greatest depth of body is in 
the female (?) contained about 22 times in total length, or 
represents 36°3 °/, of that measurement, while in the male (?) 
the corresponding figures are about 22, or 37:3°/,. This 
greatest depth is found at the occiput, and the depth at the 
origin of dorsal is about 2 millim. less. Snout and forehead 
are very broad, and the profile slopes in an almost straight 
line from occiput to end of snout. Diameter of eye is 
contained fully twice (male) or a little more (female) in 
length of snout and about five times in length of head. Inter- 
orbital space not quite so broad as length of snout, but twice 
as broad as diameter of eye in the female, not fully that in 
the male. Maxillary extending about midway between 
nostril and eye. About 100 long, conical, slightly curved 
teeth form the outer comb-like series in the upper jaw, and 
inside of this isa rather broad band of tricuspid teeth*. All 
teeth have brown points. Two series of large scales on the 
cheeks, still larger scales on the opercle. Sixteen short gill- 
rakers on lower part of anterior arch. Dorsal XV 12-13; 
last spine longest, which does not, however, equal a third 
(usually 2) of the length of head, but about two thirds of 
longest soft ray. Pectoral measuring about 2 of length of 
head and reaching beyond origin of anal. The filamentous 
prolongation of ventral is rather short, not reaching anus. 
Anal 1II 9-10; third spine longest, about equal to longest 
dorsal. Caudal squarely truncate. Caudal peduncle about 
* Although these teeth are quite plainly tricuspid, the lateral points 
are not so sharp as those figured by Boulenger (Trans, Zool. Soc. London, 
yol. xvi., 1901) from Gephyrochromis Moori. 
