OCR Text |
Show MR. G. A. BOULENGER ON [Jan. 20, M oRMYRIDjE. 1. Petrocephalus simus Sauv. 2. ISICHTHYS HENRYI Gill. 3. M arcusenius sphecodes Sauv. 4. M arcusenius brachyhistius Gill. Oh a r a c in iD j® . 5. B rycon^ethiops microstoma Gthr. 6. A lestes longipinnis Gthr, 7. A lestes intermedius, sp. n. (Plate I. fig. 1.) Depth of body 3 times in total length, length of head 4 times. Head as long as deep, twice as long as broad ; snout shorter than diameter of eye ; latter 2| to 2-| times in length of head ; adipose eyelid indistinct; interorbital width ^ length of head; width of mouth equal to diameter of eye ; maxillary not extending quite to below anterior border of eye ; 14 teeth (-|) in the upper jaw, 8 in the outer row of the lower jaw; length of lower border of second suborbital less than diameter of eye. Gill-rakers moderately elongate, 12 or 13 on lower part of anterior arch. Dorsal II 8, above ventrals, originating a little nearer end of snout than caudal, middle branched rays much produced (1 j to 1§ as long as head) in the males. Adipose fin small, 1 \ to twice as distant from the rayed dorsal as from the caudal. Anal III 19-21, the outline very convex in the males. Pectoral shorter than head, not reaching ventral; latter produced into a long filament in the males. Caudal forked. Caudal peduncle a little longer than deep. Scales 33-34 , 2 between lateral line and ventral. Silvery; a large black spot on the caudal peduncle and on the median rays of the caudal; latter yellow, blackish at the end; dorsal black and red. Total length 85 millim. Three specimens from the Kribi River. Intermediate between A. longipinnis Gthr. and A. tholloni Pellegr. Differs from the former in the smaller scales, from the latter in the smaller number of anal rays. 8. A lestes opisthot^enia, sp. n. (Plate I. fig. 2.) Depth of body 3 i or 3| times in total length, length of head 4 or 4-1- times. Head a little longer than deep, twice as long as broad ; snout a little shorter than diameter of eye; latter 2- or 3 times in length of head; adipose eyelid very feebly developed ; interorbital width \ or nearly ^ length of head; width of mouth equal to diameter of eye or a little less ; maxillary not extending quite to below anterior border of eye ; 16 teeth ( f ) in the upper |