436 Mr. G. A. Boulenger on new 
equalling or exceeding diameter of eye. Gill-rakers rather 
long, 16 to 18 on lower part of anterior arch. Dorsal II 7, 
behind the vertical of the base of the ventrals, originating 
much nearer root of caudal than end of snout, longest ray 2 
to # length of head. Adipose fin small, at least twice as far 
from the rayed dorsal as from the root of caudal. Anal III 
12-13. Pectoral shorter than head, not reaching ventral ; 
latter not reaching vent. Caudal forked. Caudal peduncle 
14 to 14 as long as deep. Scales 28-29 ze, 2 between lateral 
line and ventral. Olive-brown above and on the sides, 
whitish beneath; a large round black spot on the caudal 
peduncle, at the base of the caudal fin; fins greyish, or 
blackish at the end. 
Total length 245 millim. 
Three specimens from the Kribi River. 
This new Alestes, which I have great pleasure in naming 
after its discoverer, is closely allied to A. macrolepidotus, 
C. & V., and A. grandisquamis, Blgr., differing from both in 
the greater number of scales in the lateral line. 
Petersius major. 
Depth of body 2} times in total length, length of head 4 
times. Head as longasdeep, twice as longas broad, with concave 
upper profile ; snout shorter than diameter of eye, which is 22 to 
22 times in length of head; lower jaw projecting beyond upper ; 
maxillary extending to below anterior border of eye; outer pre- 
maxillary teeth 4, alternating with the 8 teeth of the inner row ; 
lower border of second suborbital as long aseye. Gill-rakers 
short, about 10 on lower part of anterior arch. Dorsal II 8, 
originating above root of ventrals and at equal distance from 
nostrils and from root of caudal, longest ray longer than 
head. Adipose fin large, its depth $ to 2 length of head. 
Anal III 18, anterior rays forming a rounded lobe. Pectoral 
a little shorter than head, not reaching ventral; latter not 
reaching vent. Caudal forked. Caudal peduncle a little 
longer than deep. Scales 24 3, 2 between lateral line and 
ventral; lateral line not extending beyond the eleventh to 
thirteenth scale. Silvery, yellowish on the back, a black 
spot above the shoulder and a black streak on each side of the 
tail, continued on the median rays of the caudal ; iris red ; 
dorsal fin greyish, with a band of orange-red ; rays of ventral 
fin black at the tip. 
Total length 82 millim. 
Two specimens from the Ja River. 
This species is most nearly related to P. caudalis, Blgr., 
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