332 ARGUS CHjETODON. 



gradually softens into white : down each side of the 

 head, through the eyes, runs a deep-brown band : 

 the pectoral, ventral fins, and tail are white : the 

 body is covered with moderately small scales, and 

 at the lower part of the gill-covers is a very strong 

 spine : the shape of the fins resembles those of the 

 major part of this division. Native of Japan. 



ARGUS CHJ2TODON. 



Chaetodcni Argus. C. sxbargentcus, maculis numerosis rotundis 



J'uscis 9 corpore subquadratG-ovati. 

 Silvery-grey Chaetodon with squarish-ovate body, marked with 



numerous round brown spots. 

 Chaetodon Argus. Lin. Gmtl. Rkcli. t. 204. 



GENERAL shape ovate, or rather squarish-ovate : 

 colour silvery-grey, with a brownish cast on the 

 upper parts, and the whole body, as well as part 

 of the fins, marked by numerous round brown 

 spots : scales very small : first rays of the dorsal fin 

 moderately long, those on the middle part much 

 shorter: terminal part both of dorsal and anal fin 

 rounded and slightly dilated : tail even at the end, 

 but not rounded : gill-covers perfectly smooth : 

 native of the fresh waters of India. 



