PLATE VI 



Fig. 33. Proximal extremity, anconal aspect, left humerus of Graciilaviis velox 

 Marsh (Type). Imperfect. Xat. size. Cat. Xo. 855. See description in text 

 and Figure 49 of Plate \'II. 



Fig. 34. Fragments (7 in the group) representing Gracidavus pumilus ^larsh 

 (Type). Nat. size. Above: distal end of right humerus; below it, to the left, 

 distal half of the right carpo-metacarpus (indicial shaft). The remaining five (5) 

 fragments not determined with certainty. Cat. No. 850. 



Fig. 35. Distal portion of the left tibio-tarsus of Palceotriuga Uttoralis ]\Iarsh 

 (Type). Anterior aspect. Nat. size. Imperfect. Three fragments to the right 

 belong with the same specimen. Cat. Xo. 830. 



Fig. 36. Distal end, palmar aspect, of the right humerus of a bird. Imperfect. 

 Nat. size. Telmatornis affiuis Marsh (Type). Cat. No. 845, Y. U. 



Fig. 37. Distal portion, palmar aspect, of the left humerus of a bird. Perfect 

 as far as it goes. Nat. size. Telmatornis priscus Marsh (Type). Cat. No. 840. 



Fig. 38. Posterior aspect, left coracoid of a bird. Nearly perfect. Nat. size. 

 Cimoloptcryx ranis M&xih {Type). Nat. size. Cat. No. 1805. Y. U. 



Fig. 39. Superior extremity of the left coracoid of a bird. Imperfect. Nat. 

 size. Cimolopleryx retusus IMarsh (Tj^je). Cat. N'o. 513. Y. U. 



Fig. 40. Five fragments of the shaft of a long bone, from a bird (fossil). \'ery 

 imperfect. Nat. size. Pahvotringa vagans M&rsh {Typ€). Cat. No. 835. Y. U. 



Fig. 41. Distal portion of the left tibio-tarsus of a bird (fossil) ; anterior aspect. 

 Nat. size. Perfect as far as it goes. Aietor)iis vonistns Marsh (Tv-pe). Cat. X^'o. 

 206. Y. U. 



Fig. 42. Distal extremity of the right tarso-metatarsus of some small bird 

 (fossil). Nat. size, anterior view. Six little bits of bone accompany the specimen. 

 Nat. size. Imperfect. Uintornis lucaris Marsh (T>T3e). Cat. No. 617. Y. U. 



Fig. 43. Antero-inferior view of the left tarso-metatarsus of Aletornis nobilis 

 Marsh (Type). X^at. size; fossil. The two other pieces of bone, each marked 63, 

 accompany the specimen. Y. U. 



Fig. 44. Proximal portion of the left carpo-metacaq:)us of Graculus idahensis 

 Marsh (Type). X^at. size. Perfect as far as it goes. Cat. No. 527. Y. U. 



Fig. 45. Proximal end of a humerus of some bird (fossil). Imperfect. Nat. 

 size. Aletornis gracilis M.2iX^h.(C^ype). Cat. No. 61. Y. U. 



Fig. 46. Distal end of a left tarso-metatarsus of some small bird (fossil). Nat. 

 size. Imperfect. Aletornis hellus JMarsh (Type). Cat. No. 60. Y. U. 



Fig. 47. Very imperfect fragments, 18 in number, of what appears to be a left 

 tibio-tarsus of some bird (fossil). Extremely imperfect. Aletornis per nix Marsh 

 (Type). Cat. No. 64. Y. U. 



