from the Quanza and Bengo Rivers. 559 



Numerous specimens, 65 to 300 mm. long, from the 

 Quanza River at Dondo, and from the Bengo River. 



In the adult and half-grown state this fish is easily 

 distinguished from the preceding by the broader, natter 

 head, shorter maxillary barbels, and less deeply forked tail; 

 but what I regard as the young of the two species are not 

 so readily separated. 



Cyprinodontidae. 



41. Haplochihis macrurus, Blgr. 

 Quanza River at Dondo. 



Syngnathidse. 



42. Syngnathvs ansorgii, sp. n. 



Head and body ^ of total length; osseous rings 15+37, 

 without spines ; body a little deeper than broad ; lateral 

 line and upper caudal edge not continuous. Snout as long 

 as postocular part of head ; operculum crossed by a straight 

 ridge; a ridge along the upper surface of the head and on 

 the nape. Dorsal 29, originating above vent and occupying 

 7 rings. Anal 2. Pectoral and caudal fins well developed 

 but small. Pouch half as long as tail. Yellowish brown, 

 darker on the tail, with rather indistinct dark brown bars 

 above and blackish spots dispersed regularly on the sides, 

 one above and one below the median lateral ridge to each 

 ring on the body ; dark lines radiating from the pupil ; 

 caudal fin black, edged with yellowish above and beneath. 



Total length 115 mm. 



A single specimen from the Quanza River at Dondo. 



Distinguished from S. mossambicus, Peters, and S. kaupi, 

 Blkr., by more numerous dorsal rays, and from the latter 

 by the shorter snout. 



Native name : Ralo. 



Mugilidae. 



43. Mugil falcipinnis, C. & V. 

 Bengo River at Cabiri. 



Pleuronectidae. 

 44. Cynoglossus senegalensis, C. & V. 

 Quanza River at Cunga. 



