CHESTER-PSEUDOPLEXAUR A 



PLATE 2 





^0. 













»l!/'>imi«-,Tv,i»3- 



^,. ( n'dnn 



ec'drm. 





c'drm. 





^i!f^'" 





c/.sns. nm'cys. 



I 









/■ "^''f- / mK^-j^mts^^ 



ec'drm. ms'gl. en'dnn 



<"'■'''■-• ff'- r/ in. 



''•?-:':i^0%:wf'|^f^^ 





en'drm. 



'P-Mi^ 



r^^ 





j?" .^^-TW 



ec'drm . 



■",■-- ■@>v-;' 



-'-^^'. ^-^^^ 



..V'.- ' * •* 



't rl.sns. 



cl.leg. din, my'nm.- "zJt. 20 



WM.C. del. 



Proc. Amer. Acad. Arts and Sciences. — Vol. XLVIII. 



