507 



on the upper lobe interrupted in adults, the lobe Las likewise a 

 black tip. In the young the colour is dark with two light bands 

 only half the width of the darker ones. A large black shoulder- 

 spot is sometimes visible. There are teeth on the vorner. 



Hob. East coast of Africa, seas of India, the Malay Archipelago 

 and China ; attaining at least 10 inches in length. 



671. (4.) Therapon quadrilineatus. 



Ilolocentrua quadrilineatus, Block, Ich. t. 233, fig. 2. 

 Therapon quadriliueatus, Day, Fish. India, p. 70, pi. xviii, fig. 5 (see 

 synon.). 



D. 11-12/10. P. 15. A. 3/10. L.I. 70. L.tr. 13/26. Caec.pyl.18. 



Length of head 4, height of body 4 in the total length. Eyes 

 diameter 3 in length of head, f from end of snout and also 

 apart. Preorbital slightly serrated on its lower border. Pre- 

 opercle serrated along both margins, most coarsely at its rounded 

 angle. Teeth external row in maxilla enlarged. Pins fifth dorsal 

 spine highest ; second anal spine strongest, the third longest ; 

 caudal emarginate. Pyloric appendages very short. Colour 

 silvery, with 5 (sometimes 4) horizontal black bands. A large 

 black blotch on the shoulder. Dorsal fin with a black blotch 

 between its third and seventh spines, a black mark along the middle 

 of the soft dorsal, and a black tip. Pectoral, ventral, and anal 

 canary- colour, the last darkest externally, and with a dark basal 

 band ; caudal yellowish, with a dark edge, but no bands. 



The young have six light vertical cross bands from the back to 

 the fourth horizontal band. 



Hub. Seas of India to the Malay Archipelago and China ; attaining 

 at least 6 inches in length. 



672. (5.) Therapon argenteus. 



Datnia argentea, Cuv. $ Vol. H. N. Poiss. iii, p. 139, pi. 54 ; Day, 

 Pish. India, p. 71, pi. xviii, fig. 7 (see synon.). 



D. 12/10. P. 14. A. 3/8. L. 1. 56. L. tr. 30-35. Ca?c. pyl. 11. 

 , Length of head 4, height of body 3 to 3| in the total length. 

 Eyes diameter 4 in length of head, 1| from end of snout, and 

 apart. Snout pointed. Preorbital serrated along the last half 

 of its lower edge. Preopercle serrated along its vertical margin. 

 Fins 4th and 5th dorsal spines the longest ; second anal spine 

 very strong, longer than the third, and exceeding the length of the 

 longest in the dorsal fin ; caudal notched. Colour silvery, darkest 

 along back ; a narrow black outer edge to dorsal fin ; a band along 

 middle of anal, which also has a dark margin. 



The young appear to have longitudinal bands. 



This fish has a more elevated body than the typical Therapom, 

 the dorsal spines are stronger, and there is a very slight notch 

 between the last two. 



Jl<il). Cape seas, sens of India, the Malay Archipelago, and 

 beyond. 



