Eastman. — Dinichthya. 



PLATE 1. 



Fig. 1. Dinichthys intermedius Newb. X \- Projection of cranium and dorsal plates 

 in their natural relations with respect to one another. DM, Dorso- 

 median ; ADL, Antero-dorso-lateral ; PDL, Postero-dorso-lateral. 

 Sensory canals indicated by double dotted lines, boundaries of plates 

 by single lines. The posterior process depends at an angle of about 

 60° from the plane of the dorso-median. 



Fig. 2. Dinichth>/s (?) newberryi Clarke. X \. Restoration of the Portage plastron 

 shown in Plate 4. AVM, Antero-ventro-median ; PVM, Postero- 

 ventro-median ; ^ FL, Antero-ventro-lateral ; PFZ, postero-ventro- 

 lateral. Radiating lines show approximately' the course of vascular 

 canals. Overlapped borders of plates indicated by dotted lines. 



