1 Ei^brachiosciu.yii-s 2. Echidna- 



3. Myrm.e-copha.ga 4 Dasypus 



(f) (R) 

 S Hapalops 



S.Didelphis 7.Thylacynu,i 8 Phascoloynys AMacropus W. Phala-ngista ll/lrctocyoyt iZViverravus 



13.Ca,stor 



IH- Ayctomys IS.Solenodon 16. Erinactus, 17 PeYiptychus tS Euprotogonia 



Fig. 27. Morphology of the mamiiuihaii luimerus (p. 436). Scale various. 



No. 1. Euhrachioffdurus, an Anomoflont from the Upper Trias of Wyoming. After Willis- 

 ton. No. 5. //apatops a Santa Cruz Oravigrade. After Scott. Other figures from specimen.s 

 in the American Museum. 



Abbreviations. cap., head; th. mj., great tuberosity; tb. mn., le.s.ser tuberosity; cr.dL, 

 deltoid ridge; x., tuberosity for the deltoid; cr. su., supinator ridge; ec. c, ectocondyle, or 

 ectepicondyle; (7?)., capitellum (facet for radius); (U)., trochlea (facet for ulna); en.c, ento- 

 condyle, or entepicondyle: f.ent., entepicondylar foramen. 



(437) 



