A COLLECTION OF FISHES FROM SUMATRA. 499 



HEMISCYLLIIDiE. 



1. Chiloscyllium indicum (Gmelin). 



GALEORHINID^. 



2. Galeocerdo tigrinus Muller and Henle. 



3. Carcharhinus menisorrah (Muller and Henle"). 



SPHYRNID-<E. 



4. Sphvrna zvg/Ena (Linnffius). 



RHINOBATID^. 



5. Rhvnchobatus djiddensis (Forskal). 



6. T.'ENIURA lymma (Forskal). 



7. Dasyatis russellii (Gray). 



8. Plotosus anguillaris (Bloch) 



DASYATIID^. 



PLOTOSID.^. 

 CHLARIID^. 



9. Chlarias batrachus (Linnaeus). 

 10. Chlarias olivaceus sp. nov. Plate XXVIII, lower figure. 



Clarias fuscus Valenciennes, Hist. Nat. Poiss., XV, 1840, p. 284. Sumatra. (M. Desjardins.) (Not 

 Macropteronotus fuscus Lac^p^de). 



Head h\; depth 7 ; D. 66 ; A. 51; P. I, 9 ; V. 6 ; width of head l^ in its 

 length; depth of head 2 ; snout 2|- ; eye 11 ; width of mouth 2^; interorbital l-jSj^ ; 

 pectoral spine 2-1- ; pectoral fin \\ ; ventral 2i ; caudal \\ ; least depth of caudal 

 peduncle 3. 



Body elongate. 



. Head broad and strongly depressed. Snout broad and flattened. Eye small, 

 and well anterior. Mouth broad, and with rather thin papillose lips. Teeth 

 minute, rather sharp, and in broad bands in jaws. A broad crescent-shaped patch 

 of fine teeth on vomer with a slight projection posteriorly. Anterior nostrils in 

 short tubes near edge of snout, but closer together than posterior. Posterior slit- 

 like, behind bases of nasal barbels midway between anterior and front margin of 

 eye. Interorbital space broad, flattened, and slightly elevated, especially poster- 

 iorly. Nasal barbel reaching almost opposite edge of gill-opening. Maxillar}- 

 barbel not quite reaching tip of pectoral spine. Outer mental barbel reaching 

 about first two-fifths of pectoral spine. Inner mental barbel reaching base of 

 pectoral spine. Fontanel shaped like a plumb-bob, rounded posteriorly, and not 

 quite equal to space between two nasal barbels. Interparietal fontanel about 

 equal to eye. 



Gill-rakers slender, moderate in number, pointed and not as long as filaments 

 on first arch. 



Skin rather smooth. Lateral, line somewhat obsolete along middle of side to 

 base of caudal. 



Dorsal beginning well behind tip of depressed pectoral, and separate from 

 caudal posteriorly. Anal similar to dorsal and inserted a little nearer tip of snout 

 than base of caudal. Pectoral a little less than half of space to ventral. Pectoral 



