Figure 61.— External features of other 



representative balistid genera: Abalistes 



etetlaris— upper left, scale plates of the 



tympanum region just behind the gill slit and above 



the pectoral fin base; upper middle, scales 



from upper middle region of body, including 



lateral line canal bearing scales; upper 



right, ventral view of encasing scales at 



end of pelvis (anterior to left), with arrow 



indicating major region of flexibility 



(two terminal branches of modified 



fin-ray element protrude posteriorly); lower 



left, nasal region as seen externally 



(above) and the olfactory lamellae as seen 



with the top of the nasal sac removed. 



Figure 62.— External features of other 



representative balistid genera: 



Canthidermis maculatus— upper left, scales of 



the relatively unmodified tympanum region 



just behind the gill slit and above the 



pectoral fin base; upper middle, scales 



from upper middle region of body, including 



lateral line canal bearing scales; upper 



right, ventral view of encasing scales at 



end of pelvis (anterior to left), with 



arrow indicating major region of Hexibility 



(modified fin-ray element not protruding); 



lower left, nasal region as seen 



externally (above) and the olfactory 



lamellae as seen with the top of the 



nasal sac removed. 



Figure 63.— External features of 



other representative balistid 



genera: Xanthichthya ringens — 



upper left, scales of tympanum 



region just behind the gill slit 



and above the pectoral fin 



base; upper middle, scales from 



upper middle region of body, 



including lateral line canal 



bearing scales; upper right, 



ventral view of encasing scales 



at end of pelvis (anterior to 



left), with arrow indicating 



major region of flexibility 



(three terminal branches of 



modified fin-ray element protrude 



posteriorly); lower left, 



nasal region as seen externally 



(above) and the olfactory 



lamellae as seen with the top 



of the nasal sac removed. 



