Figure 219.— External features of 



other representative tetraodontid 



genera: Ephippion guttifer of 



decreasing sizes, from top to bottom 



(325, 232, and 101 mm SL) to show 



the enlargement of the scale plates 



with increasing standard length 



until, in large adults, a firm 



saddle is formed over the back and 



sides (but not belly); other two 



insets show nasal region as seen 



externally; scales of 101 mm SL 



shown for both beUy 



Figure 220.— Photographic detail of 



interdigitated scale plates from lower 



side of body of Ephippion guttifer, 



325 mm SL, also shown in 



Figure 219 (greatest length of largest 



scale plate 23.0 mm). 



Figure 221.— External features of 



other representative tetraodontid 



genera: Chelonodon patoca (above) and 



C. fluviatilis— in both cases, upper 



left, nasal region as seen externally, 



and, lower left, scales from upper 



middle region of body. 



