Figure 222.— External features of other 



representative tetraodontid genera: 



Monotreta palembangensis (above) and 



M. leiurus— in both cases, upper 



left, nasal region as seen externally, 



and, lower left, scales from upper 



middle region of body. 



Figure 223.— External features of other 



representative tetraodontid genera: Chonerhinos 



modestus— upper left, nasal region as seen externally 



(far left) and the olfactory lamellae as seen with the 



top of the nasal sac removed; lower left, scales 



from upper middle region of body. 



Figure 224.— External features of other representative tetraodontid 

 genera: Xenopteriui naritua— upper left, nasal region as seen 

 externally; lower left, scales from upper middle region of body. 



