140 ME. G. A. BOTJLEIfGEE ON THE AtRIOAN AOT) [Feb. 7, 



inner rows very small. Depth of body 2 to 2-L in total length, 

 length of head 3^. Occiput strongly humped, forming an angle 

 with the upper profile of the snout, which is straight and somewhat 

 convex ; snout 1^ diameter of eye, which is 3| to 4 times in length 

 of head and 1| in interorbital width ; mouth moderate, about § 

 width of head, extending to below anterior border of eye ; 5 series 

 of scales on the cheek ; larger scales on the opercle. Gill-rakers 

 short, 11 on lower part of anterior arch. Dorsal XIV-XV 12-13 ; 

 last spiue longest, f length of head ; middle soft rays much 

 produced, longer than the head. Pectoral pointed, as long as the 

 head, not extending so far as origin of anal. Ventral reaching 

 vent. Anal III 10 ; third spine a little longer than last dorsal ; 

 soft rays produced like the dorsals. Caudal emarginate. Caudal 

 peduncle slightly deeper than long. Scales with finely denticulate 

 border, 31-33 ^. 



Total length 200 millim. 



Two badly preserved specimens from the collections of the 

 Eev. W. D. Cowan in Betsileo, Madagascar. 



The following species from Lake Ngami are insufficiently 

 described by Castlenau, Mem. Poiss. Afr. Austr. (1861) : — 



Chromys sparmanni, p. 12. 



D, XVI 12 ; A. Ill 10. Body short and deep. Dark green ; 

 anterior half of caudal dark red, posterior half greenish white. 



Chromys andersoni, p. 14. 



D. XVI 15 ; A. Ill 12. Teeth in 4 series. Body short and 

 deep ; pectoral very long ; dorsal and anal prolonged. Blackish 

 grey ; caudal dark red ; dorsal grey, edged with red ; dorsal and 

 anal with round blue spots. 



Chromys chapmani, p, 15. 



D. XVI 11; A. Ill 10. Lat. 1. j|. Body short and deep; 

 pectoral very long. Greyish white ; caudal blackish, yellow in the 

 middle ; dorsal grey, variegated with yellow and tipped with 

 reddish. 



Chromys smithi, p. 16. 



Lat. 1. j^. Teeth in tMO rows. Pectoral not prolonged. Black 

 above, yellow beneath ; head dark red beneath ; dorsal and caudal 

 greenish ; ventrals and anal pm-ple. 



Chromys levaillanti, p. 16. 



D. XV 14 ; A. Ill 11. Body elongate. Pectoral rather short. 

 Grey ; head covered with red dots ; dorsal grey, dotted with black ; 

 caudal dirty green ; anal yellowish green, dotted with red. 



