Jordan and Starks: Fishes from Ceylon. 435 



Genus Saccobranchus Cuvier & Valenciennes. 



20. Saccobranchus fossilis (Bloch). 



No. 8038c-//, C. M. Several specimens, five to eight inches long, 

 from the river at Colombo. The notch between the anal and the 

 caudal is variable; in some of the smaller ones it is but little developed. 



Genus Batrachocephalus Bleeker. 



21. Batrachocephalus mino (Hamilton-Buchanan). 



No. 8039c, C. M. A single specimen from the river at Colombo. 

 It has the eye som.ewhat smaller than described by Day, it being con- 

 tained five times in the head, rather than four times. Bleeker's plate 

 shows it to be four and one-half times in the head. The ridges which 

 run from the eye form an even concave curve, not a double curve, as 

 shown in Bleeker's plate. 



Genus Osteogeneiosus Bleeker. 



22. Osteogeneiosus militaris (Linnaeus). 



No. 8040C, C. M. A specimen from the river at Colombo agrees 

 very well with Day's description {Fishes of India, p. 469) though the 

 eye is a little smaller (eight times in length of head, four and a half 

 times in the interorbital width); the gape a little narrower (two and 

 a half times in the head). 



23. Osteogeneiosus sthenocephalus Day. 



No. 8041C, C. M. A single specimen from the river at Colombo. 

 It differs from 0. militaris in having a larger eye, a slenderer and 

 slightly smaller head, a narrower mouth, and higher fins; the ridges 

 on top of the head not so high and less conspicuous; the top of the 

 head above the opercle less rough; and the sides of the body below 

 the occipital process more steeply sloping. 



Genus Ariodes Bleeker. 



24. Ariodes dussumieri (Cuvier & Valenciennes). 



No. 8042c, C. M. One large specimen from the sea at Colombo. 



Genus Macrones Dumeril. 



25. Macrones vittatus (Bloch). 



No. 8043C-&, C. M. Three small specimens from the river at 

 Colombo. 



