1877.) 583 (Cope. 
the distal, and is subtriangular in outline ; the apex being acute and ex- 
ternal. The surface is flat, and is strongly marked with deep grooves. 
The other surfaces of the limb-bones are smovth, except a few weak ridges 
near the distal ends of the two distal bones. 
Meusurements. , M. 
Length of part of scapula preserved...............00% 0.680 
Width at middle..... ssid a a ac uraiaamidie's ee vusnmalnatee eenroialeee 0.270 
Thickness at middle............cce cece eeeenes fies 0.048 
Thickness at proximal angle.............ceccceeeeeee 0.117 
Total length of humerus..............ceeeeeeeeee eens 0.765 
5 ty NOH: ac atvoadw te esas 0.080 
D roximal ie 
iaingter et proximal end at tuberostties.........00. 0.225 
a. j tero-posterior....... ..... eee eee 0.080 
D { an p 
temeter an eu GAN SVORS O35. Syessht sae ace diesenece Sox Savio 0.078 
Dianeter of aistal ena { antero posterior............. 0.085 
: : : transverse: ........... 02.005 0.145 
Transverse diameter of head of humerus.............. 0.160 
Diner f ? antero-posterior. .... 0,110 
iameter of extremity of ? ulna { Premiere. ce. ces 0.150 
Length of external metacarpal.............0.0000cuee 0.210 ° 
Prominal dismeter { antero-posterior........... feeeees 0.045 
A ronsVerbe..0. cue weiereseassees 0.100 
5 antero-posterior... ........00 eee eee 0.033 
Dismietes renal { PPADS VGLRCs asd. siesiseine ss os aoedw eae 0.067 
i é tero-posterior...........006 ixead 0.050 
D { an 
HeteE eistelly PPANISVETSO: 6a: 3) side ca chores Rareiere wigan 32 0.115 
Length of median metacarpal (stouter).............005 0.245 
fn -POsteriOLr..... ss. eee eee 057 
Di : ‘ ({ antero-posterior.......... 0 
EE ey tAMSVETSE, 66.6. e vee eee e eee 0.115 
Diameter of shaft (transverse). .......... 000 ceeee eee 0.055 
Dinineter distalte { antero-posterior. ..........0.ee eee 0.074 
=" Vttamaverseexens :sceweue's «dos auadoa 0.088 
Length of median metacarpal (slender)............64+ 0.240 
i tales f antero-posterior........... 0.057 
peer e proxtnat anh Utransverse ........085 fates 0.089 
Diameter of shaft (transverse)..........0c ec eee eee eee 0.049 
‘ oer antero-posterior. .........eee veces 0.041 
Dhranas ten sista ihy { WPANSV CSC sis, iaiss. 6 Hiedeas sea eames 0.083 
More than usual interest attaches to this fossil. It is the first one found 
in the Triassic beds of the Rocky Mountain region, and was derived from 
an inhospitable region rarely traversed by white men. The locality is 
in ‘the Painted Canyon not far from the Sierra Abajo in South-eastern 
Utah, near the Colorado boundary ; lat. 88° 15’; lon. 110°. This canyon 
is one of those tributary to the Great Colorado River, and is without water. 
The rock is ‘described by Prof. Newberry as the same as that which I 
