Figure 214.— External features of 



other representative tetraodontid 



genera: A, Amblyrhynchotea pioaae — 



upper left, nasal region as seen 



externally (far left) and the olfactory 



lamellae as seen with the front of the 



nasal sac removed, and, lower left, 



scales from upper middle region of body 



(spines on caudal peduncle surrounded 



by fleshy flaps which are better 

 developed there than more anteriorly); 

 B, A. honckenii— upper left, nasal 

 region as seen externally (far left) 

 and the olfactory lamellae as seen 

 with the top of the nasal sac removed, 



and, lower left, scales from upper 



middle region of body; C, A. richei — 



upper left, nasal region as seen 



externally (two lower figures), 



indicating that I out of 10 specimens 



has the nostrils confluent and the 



nasal tube with a single large opening, 



with the upper figure showing the 



olfactory lamellae with the top of 



the nasal sac removed, and, lower left, 



scales from upper middle region of body. 



Figure 215.— External features of other 



representative tetraodontid genera: 



Torquigener pleuroalictus (above) and 



T. hamiltoni— in both cases, upper left, nasal region 



as seen externally (far left) and the 



olfactory lamella(e) as seen with the 



front of the nasal sac removed, and, lower left, 



scales from upper middle region of body. 



Figure 216.— External features of other 

 representative tetraodontid genera: 

 Fugu vermicularis — left, bottom to 

 top, nasal region as seen externally, 

 the olfactory lamellae as seen with 

 the front of the nasal sac removed, 

 and the outline of an anteroposterior 

 cross section of the sac and lamellae. 



