new African Cyprinodont Fishes. 261 



of wliicli are based on specimens which have been brought 

 over alive for exhibition in aquariums, or which are of interest 

 as destroyers of mosquito-larv£B ; it is therefore desirable to 

 publish descriptions of them in anticipation of the forth- 

 coming third volume of the British Museum Catalogue of 

 Fresh-water Fishes, in which all the known species will be 

 described and most of them figured. 



I seize this opportunity to point out that the scales of 

 the Cyprinodont described by me as Ilaplochilus tangani- 

 canus are ctenoid ; this character and others justify the 

 establishment of a new genus, for which Alohanga, one of the 

 native names of the fish, is proposed. Mohanga tanganicana 

 further differs from all other African Cyprinodonts in having 

 the conical unequal-sized teeth forming a band which is 

 exposed when the mouth is closed, as in the Atherinid genus 

 Rhomoatractus, and a larger anal fin with 28 to 30 rays. 



Fundulus gardiipri. 



Depth or body 4 times in total lengtii, length of head 3g- to 

 3|^ times. Head flat above; snout slioit and broad, as long- 

 as eye ; mouth directed upwards; lower jaw proj-ecting ; eye 

 4 times in length of head, twice in interorbital width ; space 

 between eye and lip about j diameter of former. Dorsal 13, 

 originating at equal distance from head and from base of 

 caudal ; longest (posterior) rays | to once length of head. 

 Anal 15-16, originating slightly in advance of dorsal. Pec- 

 toral § length of head, just reaching base of ventral, which is 

 small and midway between end of snout and base of caudal. 

 Caudal rounded, with one of the upper and one of the lower 

 rays produced (males). Caudal peduncle a little longer than 

 deep. 28-31 scales in longitudinal series, 22-24 round body 

 in front of ventrals ; lateral line entirely absent, or indicated 

 by a few pits. Olive above, white below ; sides of head and 

 body, chin, and fins with crimson spots; upper edge of 

 dorsal and upper and lower edge of caudal white. 



Total length 60 mm. 



Head-waters of Cross River, Calabar. Three specimens 

 from Okwoga, lat. 7° N., long. 7° 45' E., were presented by 

 Mr. R. D. Gardiner. 



Fundulus hatesii. 



Depth of body 4,^ times in total length, length of head 3^- 

 times. Head flat above; snout short and broad, as long 

 as eye ; mouth directed upwards ; lower jaw projecting ; eye 

 3§ times in length of head, 1^ times in interorbital widtli. 



