PLATE XXIX. 



va(;e. 



Fig. 1. Pariostegus myops, Cope. Twice natural size. (See Trausac. American Philos. Soc, 1868, 

 XIV., p. 15.) 



2. PtyoniuspecUnatus, Cope. Twice natural size .377 



3. Scale of abdomen of Colosteus scutellatas, Newb. Twice natural size 407 



