PLATE I. 



PAfiE. 



Fig. 1 . EDESTCS HEXREICHSII, N. and W 350 



1 a. Side view, two-thirds natural size. 



1 b. Section of the same, one-half natural size. 



Fig. 2. EDKSTUS VORAX, Leidy 350 



Side view of specimen, natural size. 



