26 



like anal, of exceedingly numerous closely-set soft rays ; its 

 greatest height 4-65-5-30 in the length of the head. Distance 

 between end of opercle and origin of anal, a little more than the 

 length of the head. Greatest height of anal 5-00-5-55 in the 

 length of the head. Pectoral rounded, inserted in the lower half 

 of the depth of the body, about 2J times as long as the width of 

 its base; its length 2-45-2-60, the width of its base 6-15-6-25 in 

 the length of the head. Longer portion of barbel (in smaller 

 specimen only) 2-30 in the length of the head. 



Scales very small ; snout naked. 



Lateral line distinct, and continued to within a short distance 

 of the end of the tail. 



Color: A light ground, marbled all over with irregular patches 

 of dark-brown ; back of head darkest. 



MEASUREMENTS OF Genypterus blacodes (Forster). 



Length overall (in millimeters) 



Length to base of caudal fin* (in millimeters) ... 



Length of head in hundredths of length to base of caudal 



Height of body at beginning of base of anal fin 



Height through centre of eye 



Width at end of opercle ... 



Width above beginning of base of anal fiii 



Diameter of eye 



Width of interorbital space 



Length of snout 



From point of snout to end of maxilla 



From point of snout to base of pectoral fin 



From point of snout to beginning of base of dorsal fin 



From point of snout to beginning of base of anal fin ... 



Greatest height of dorsal fin 



Greatest height of anal fin 



Length of pectoral fin 



Width of base of pectoral fin 



Length of barbel 



Length of tail (without fin) 



590 



570 



21 9 



126 



7-5 



96 



7-4 



2-6 



39 



4-0 



8-2 



19-3 



249 



46-1 



4-7 



4-4 



89 



35 



9-5 



3-9 



675 



655 



22-6 



11-5 



6-9 



9-2 



7-0 



3-1 



37 



3-8 



87 



20-6 



24-9 



47-8 



4-3 



4-1 



8'7 



37 



52-2 



* There is no true caudal fin . 



I think there is no doubt that Castelnau's Genypterus australis\ 

 is identical with this species. 



tCastelnau : Proc. Zool. and Acclim. Soc., Viet., i, 1872, p. 161. 



