92 MR. G. A. BOULENGER ON A COLLECTLON 
last, which is 4 length of head; soft rays slightly longer, the last not produced. Anal 
III 17; third spine { length of head. Pectoral pointed, # length of head. Ventral 
nearly reaching origin of anal. a deeply emarginate. Caudal peduncle twice as 
long as deep. Scales 443; lat. 1. ae Brownish above, whitish beneath ; a blackish 
opercular spot; a lateral series of rather indistinct dark spots; dorsal greyish; other 
fins yellow. 
Total length 97 millim. 
A single specimen, with the mouth and pharynx full of advanced embryos. 
The characters of the 3 species of Hctodus may be contrasted as follows :— 
E. descampsi. D. XIII-XIV 13-14. A. III 8. Sq. 34-55 War: lata Ae Tos 
Depth of body 33-84 in total length. Snout slightly shorter than ee 
E. melanogenys. D. XIII-XIV 16-17. A. HII 13. Sq. 43- 44 = 
Depth of body 5-54 in total length. Snout much longer per ee 
B. longianaliss D.XV 15. A. TIL17. Sq. 448; lat. 1. 
total length. Snout much longer than eye. 
30-31 
o 3 Jat. 1. pei 
oe Depth of body 6 in 
XENOTILAPIA, g. 0 
Body moderately elongate; scales ctenoid; three lateral lines. Mouth small, very 
protractile; upper jaw with series of minute conical teeth; two mandibular teeth 
turned outwards, in a single series; maxillary concealed under the preorbital when 
the mouth is closed. A large papillose pad on each side of the pharynx, between the 
gills. Dorsal with 14 or 15 spines, anal with 3. 
11. XENOTILAPIA SIMA, sp. n. (Plate XIX. fig. 5.) 
Depth of body 4 times in total length, length of head 3}. Snout very short and 
deep, with very steep convex upper profile; eye very large, oval, its diameter 2 length 
of head and much greater than interorbital width ; mouth nearly straight, Honigongal 
extending to below anterior border of eye; 3 or 4 series of scales on the cheek; 
deciduous scales on the opercle. Gill-rakers very short, broad, truncate, 9 on lower 
part of anterior arch. Dorsal XIV-XV 12; spines subequal from the fifth, + length 
of head; longest soft rays ? length of head. Pectoral acutely pointed, as long as head. 
_ Ventral with the inner ray produced and reaching a little beyond origin of anal. 
Anal III 11; third spine 3 length of head. Caudal with deep ie notch. 
32-36 
lat. 1. 21-22. 
TH-16 
Caudal peduncle twice as longasdeep. Scales strongly ciliated, 40—41 - aa 3 
