NJfCaUENE. 



6S< 



Palate-rUf/es (fig. 62) (examined in N. varius, o/clods, and 

 eephalotes).— About 13-15 ridges, evenly covering the whole of the 



Fig. 62. -Palnte-ridges oi NycHmene cydoih (type of species). 



interdental and postdontal palate, the interspaces between the 

 ndges becoming slowly and gradually narrower in antero-posterior 

 direction; anterior ridge closely behind canines, ajiproximately 

 straight, subsequent ridges gradually more and more convex; five 

 (or four or six or seven) anterior ridges generally undivided, 

 posterior ridges more or less distinctly, though always narrowly' 

 interrupted in middle; postdental ridges very often" asymmetric! 

 In total aspect the palate-ridges are strikingly similar to those of 

 Cynoptervs (fig. 50, p. 5!»1), the only diff-erences worth noticing 

 being these : in Gynoph-ms there is always a ridgeless space in 

 the middle of the postdental palate, in Niirt>mene the ridges are 

 arranged uninterruptedly over the whole of the postdental palate • 



