OSTEOLOGY OF E. DOLLOVIANUS, COPE 7 



skull as are preserved also go to show the correctness of the 

 restoration. The basi-cranium is separate from the rest of the 

 skull and shows but few differences from the basi-sphenoid and 

 basi- occipital figured in the description of Dimetrodon (i), PI. I, 

 Figs. II-14. The bones are somewhat smaller and a little 

 broader in proportion than in Dimetrodo7i. 



Fig. 3. — United scapula, coracoid, and epicoracoid, scp, scapula; co, coracoid 



epi, epicoracoid. y^ natural size 



MEASUREMENTS OF THE SKULL. 



Length of skull from anterior end of nose to posterior edge of 



orbit .......... 0.225™ 



Height from just back of last tooth to top of skull - - 0.080 



Antero-posterior and vertical diameters of orbit ... 0.050 



Greatest height of side of skull - - - - - - o.ioo 



The sJioidder girdle. — The left side of the shoulder girdle is 

 preserved almost without distortion, so that it is possible to 

 make out the natural curvature of the structure. In Fig. 3 are 

 shown the united scapula, coracoid, and epicoracoid ; the true 

 length of the scapula is not shown because of the foreshortening 

 due to the curvature, but in Fig. 4 are shown the scapula and 



