476 



PATAGONIAN EXPEDITIONS I PALEONTOLOGY. 



Ulna, length 053 



Radius, length 041 



" proximal width 006 



" distal width 006$ 



Metacarpal II, length 013 



" " proximal width 003 



Metacarpal III, length 016 



" " proximal width 003 



Metacarpal IV, length 015 



Metacarpal V, length oio 



" " proximal width 003 



Pelvis, length 7.072 



Ilium, length 043 



" greatest width 014 



Ischium, length ?.O2g 



Symphysis, length 024 



Femur, length from head 0645 



" " great trochanter.. .068 



proximal width 017 



" distal width 013 



Tibia, length 075 



" proximal width 013 



" " thickness. , 012 



Tibia, distal width 008 



Fibula, length 067 



" distal width 004 



" " thickness 005 



Tarsus, length 02 1 



Astragalus, length on 



" width of trochlea 006 



" " " distal end 004 



Calcaneum, length 018 



Metatarsal II, length 023 



" " proximal width 0035 



" " distal width 0035 



Metatarsal III, length 024 



" " proximal width 0045 



" " distal width 0045 



Metatarsal IV, length 022 



" " proximal width 003 



Digit II, phalanx I, length on 



" " " " proximal width .. .014 



" III, " " length 013 



" " " 2, length 005 



" " " 3, length 009 



"IV, " i, on 



FIG. 48. 



EOCARDIA MODICA (Ameghino). 



Dicardia modica Amegh. ; Rev. Argent, de Hist. Nat, T. I, 1891, p. 302. 



It is not yet possible to determine whether this 

 is a valid species or merely a variant, and it is 

 therefore provisionally retained. To it I refer a 

 mandible (A. M. N. H., No. 9,526), which agrees 

 well with the type. In size this species is some- 

 what less than R. excavata; p T has a very charac- 



Eocardia modica. left , ,\ . . . . ,, 



tenstic appearance, the anterior prism being: small, 



lower grinding teeth, ex- l 



ternal and crown views, perfectly triangular and with the groove of the 

 x f A. M. N. H. anterior face broad and shallow. 



MEASUREMENTS. 



Lower dentition, length p t -mj 016 



Pj, length (/. e., antero-posterior diameter) .003 



P ? , width of anterior prism 002 



Mandible, depth at p^ 009 



