176 revision of the pelycosauria. 



Plate 33. 

 Ends of various limb bones showing form ; see text-figures. 



KiG. I . Proximal end of humerus oiDimctrodoJi incisivus, No. 1044 University of Chicago. 



2. Proximal end of humerus of Dimctrodon obiiisidcns, No. 1045 University of 



Chicago. 



3. Proximal end of humerus of Dimctrodon navajovicus. No. 1037 University of 



Chicago. 



4. Proximal end of humerus oi Naosaiirus, No. 1038 University of Chicago. 



5. Proximal end of humerus of Dimctrodo7i navajovicus, No. 1046 University of 



Chicago. 



6. Proximal end of humerus of Dimctrodon sp., No. 1039 University of Chicago. 



7. Distal end of humerus oi Naosaunis, No. 34 University of Chicago. 



8. Distal end of humerus (?) Theropleura, No. 1043 University of Chicago. 



9. Distal end of humerus oi Dimctrodon incisivKs, No. 1031 University of Chicago. 



10. Distal end of humerus oi Dimctrodon sp., No. 1209 University of Chicago. 



1 1 . Distal end of humerus oi Dimctrodon obtiisidcns, No. 1028 University of Chicago. 



12. Distal end of humerus oi Dimctrodon navajovicns. No. 1030 University of Chicago. 



13. Proximal end of femur of (?). 



14. Proximal end of femur of Clcpsydrops, No. 1033 University of Chicago. 



15. Proximal end of femur oi Dimctrodon sp., No. 1050 University of Chicago. 



Plate 34. 



Edaphosanrus pogonias. All figures X -/i. 



Fig. I. The upper surface of the skull. 

 2. The lower surface of the skull. 



Plate 35- 



Naosaiirus clavigcr Cope, mounted skeleton in the Cope Collection of the American 



Museum of Natural History, presented by Morris K. Jesup. X about }&. 

 The skeleton was mounted by Mr. Adam Hermann, with the assistance of Dr. W. D. 



Matthew, under the direction of Professor H. F. Osborn. 

 The backbone belongs to a single individual and constitutes the type; the skull, the 



shoulder and pelvic girdles, limbs, and feet represent an assemblage of several 



individuals. 

 The lighter areas represent the restorations in plaster, most of which are based upon 



actual knowledge. 



(See note under morphological description oi Naosaurus clavigcr.^ 



