On neio Fishes from Central Africa. 487 



Mastacemhelus longicauda. 



Depth of body 24 times in total len^jtli, lengtli of head 

 (without rostral appendage) 11 times. Vent much nearer end 

 of snout than base of caudal fin. Length of head 4 times in 

 its distance from vent and a little greater than its distance 

 from first dorsal spine. Snout 4 times as long as eye, ending 

 in a trifid appendage, which is not quite twice as long as eye ; 

 cleft of mouth extending to below anterior border of eye; no 

 prseorbital spine; two strong prajoi)ercular spines. Vertical 

 fins united with the very short, broadly rounded caudal. 

 Dorsal XXVII 150; last spine once and ^ diameter of eye. 

 Anal n 150*. Pectoral one fourth length of head. 14 series 

 of scales between origin of soft dorsal and lateral line. Brown 

 above, yellow beneatii ; a dorsal series of small dark brown 

 spots ; sides with lighter spots, some of which are ocellar ; 

 end of tail with large dark brown spots. 



Total length 305 mm. 



A single si)ecimen from Akok, Kribi River. 



Allied to M. Greshoffi, BIgr., from the Congo, but form 

 more elongate, caudal tin more rounded, and no preeorbital 

 spine. 



LXVII. — Descriptions of Three new Fishes from Central 

 Africa. By G. A. BOULENGER, F.R.S. 



Peter sius Woosnami. 



Depth of body equal to length of head, 4 times in total 

 length. Head lunger than deep, with convex upper profile ; 

 lower jaw projecting slightly beyond upper; diameter of eye 

 equal to lengtli of snout, o times in length of head ; maxillary 

 not extending to below anterior border of eye ; 14 teeth (^) in 

 the upper jaw, 8 in the lower ; outer prgemaxillary teeth 

 tricuspid, inner multicuspid and inserted directly behind the 

 outer. Gill-rakers short, 12 on lower part of anterior arch. 

 Dorsal III 8, originating above base of ventrals and at equal 

 distance from end of snout and from root of caudal; longest 

 ray about J length of head. Adipose fin very small. Anal 

 III 17-lb. Pectoral shorter than head, not reaching ventral. 



* The numbers of soft raya are approximative, the vortical tins of the 

 unique specimen being rntlier stitY, rendering the counting of the nus 

 verv difficult. 



