472 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



STANDARD LENGTH IN MM, 



Figure 18. — Relation of distance snout-to-pelvic fin to standard length on 115 specimens of Kyphosus sectatrix and 99 

 specimens of Kyphosus incisor. Dots denote A', sectatrix, X's denote K. incisor, and circles denote capture beyond 

 the Atlantic coast of the United States and the northern Bahamas. 



STANDARD LENGTH IN MM. 



Figure 19. — Relation of pectoral fin length to standard length on 100 specimens of Kyphosus sectatrix and 94 specimens 

 of Kyphosus incisor. Dots denote K. sectatrix, X's denote K. incisor, and circles denote capture beyond the 

 Atlantic coast of the United States and the northern Bahamas. 



percent from 8.5 to 60 mm. and 35.2-41.2 percent 

 from 60 to 260 mm. (table 13). 



Pectoral Jin length. — The relation of pectoral fin 

 length to standard length shows a uniform rate 

 of increase to about 50-60 mm., with the rate 

 beyond 60 mm. relatively uniform but lower than 

 initially (fig. 19). 



Pectoral fin length expressed as percentage of 

 standard length ranged 18.9-24.1 percent from 

 8.5 to 20 mm., 19.4-24.1 percent from 20 to 60 

 mm., and 16.9-21.9 percent from 60 to 260 mm. 

 (table 13). 



COMPARISON OF THE SPECIES 

 ANATOMY AND APPEARANCE 



Dorsal Hn. — No interspecific variation in nmn- 

 ber of dorsal spines was observed, as more than 



four-fifths of the specimens of each species had 

 11 spines. Number of dorsal soft-rays is one of 

 the best characters for separating K. sectatrix 

 from K. incisor (fig. 20). In K. sectatrix 91 

 percent had 12 rays; in K. incisor 99 percent liad 

 13 or 14 rays. Soft-rays start branching by 

 13.1 mm. in K. sectatrix, but not before 17.2 mm. 

 in K. incisor. 



Anal fin. — No interspecific variation in number 

 of anal spines was observed. Number of anal 

 soft-rays is another good character for separating 

 K. sectatrix from K. incisor (fig. 201. In K. 

 sectatrix 95 percent had 11 rays; in K. incisor 

 100 percent had 12 or 13 rays. Soft-rays start 

 branching by 15.0 mm. in K. sectatrix, but not 

 before 17.5 mm. in K. incisor. 



Pectoral Hn. — ^Interspecific variation in number 

 of pectoral rays was indistinct throughout the 



