39 



Adocus variolosus, Cope, (sp.) 



Plate II, figs. 1, 2 and 3. 



Compsemys ogmius, Cope. 1875. Report on the Geology and Resources of the forty-ninth parallel, 

 appendix B. 



Compsemys variolosus, Cope. 1876. Proc. Acad. Nat. Sci. Philadel,, vol. .xxviii, p. 2.57. 

 Adocus variolosus, Lambe. 1901. Ottawa Naturalist, vol. .xv, p. 63, pis. iii, iv, v, and vi. 



The proportions of the component feloments of the plastron of this species can be seen 

 by referring to figures 4 and 5, where restored outlines are given, based on two 

 fragments of the same shell, which are represented in the figure by the shaded portions. 

 The sutures between the bones are shown by the sinuous lines and the boundaries of 

 the shields by the heavy ones. The dotted lines represent the supposed shape of the end 

 of the posterior lobe, the direction of the sulcus defining the front limit of the femoral 

 shields, and the position of the sulcus that probably crossed the xiphiplastrals, whilst the 

 extent of the hypoplastrals is conjectural. 



^6 



Fig. 4 — Plastron of Adortix variolosus ; one-sixth the natural size. 



Fia. 5 — Uppper or inner surface of the same plastron, from Red 

 Deer river, Alberta. 

 IG, Intergular shield ; G, Gular do. ; JIUM, Humeral do. ; PEC, Pectoral do. ; AJJ, Abdominal do. ; FEM, Femoral do. : AX, Anal do. ; 

 EP, Epiplastral hone; SNTP, Entoplastral do. ; HYP, Hyoplastral do. ; HPP, Hypoplastral do. ; XP, Xiphiplastral do. 



