. The Deseado formation of Patagonia . Measurements, Specimen 3201 Humerus, j,n-ealest diameter of the distal end width of trochlea on the anterior sidewidth of trochlea on the posterior side 58 mm. NOTODIAPHORUS CRASSUS 33 C i 4 ■I. •,«. Fig. 7. Ri^ht radius and ulna, distalend of ulna from specimen No. 3275—1/2 natural Fig. 8 LciL li nun posterior side—1/2natural size 34 TIIK DESEADO FORMATION OF PATAGONIA The radius and ulna were from another sperimen which,however, was associated with a typical astragulus. Thetwo hones arc long, slender, strongly curved, and in con-tact
. The Deseado formation of Patagonia . Measurements, Specimen 3201 Humerus, j,n-ealest diameter of the distal end width of trochlea on the anterior sidewidth of trochlea on the posterior side 58 mm. NOTODIAPHORUS CRASSUS 33 C i 4 ■I. •,«. Fig. 7. Ri^ht radius and ulna, distalend of ulna from specimen No. 3275—1/2 natural Fig. 8 LciL li nun posterior side—1/2natural size 34 TIIK DESEADO FORMATION OF PATAGONIA The radius and ulna were from another sperimen which,however, was associated with a typical astragulus. Thetwo hones arc long, slender, strongly curved, and in con-tact with each other throughout their entire length, vSotiiat there could have been no rotary movement of the fore-arm. Hie radius is a slender hone with the proximalarticular facet relatively small, the facet being slightlyconcave, of ovoid outline and with the transverse diameterthe greater. There is but a tiny band-like facet for theulna situated on the posterior side near the inner , the radius widens into a heavy end with a rugosearea on the outer side for contact with the ulna, and withtwo distal facets, a larger for the scaphoid, and a smalleri6r the lunar, the two being separated by a low ridge. Idle ulna is heavier above, with a strong backwardlydirect(Hl olecranon process. The sigmoid notch makesalmost a vsemi
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectpaleontology
