. Bulletin - United States National Museum. Science. UNRECOGNIZED CALVERT CETOTHBRE 159 Measurements (in mm.) of the scapula of USNM 23494 are as follows: Right Left Greatest anteroposterior diameter of scapula, 345+ 345 + estimated Greatest anteroposterior diameter of scapula, as 290 335 preserved Greatest vertical diameter, articular head to 234 230 vertebral margin Length of coracoid, superior margin at base to 33+ — distal end Posterior face of articular head to distal end of 115+ — coracoid Length of acromion, superior margin at base to 65+ 75 + distal end Greatest anteroposterior diamete
. Bulletin - United States National Museum. Science. UNRECOGNIZED CALVERT CETOTHBRE 159 Measurements (in mm.) of the scapula of USNM 23494 are as follows: Right Left Greatest anteroposterior diameter of scapula, 345+ 345 + estimated Greatest anteroposterior diameter of scapula, as 290 335 preserved Greatest vertical diameter, articular head to 234 230 vertebral margin Length of coracoid, superior margin at base to 33+ — distal end Posterior face of articular head to distal end of 115+ — coracoid Length of acromion, superior margin at base to 65+ 75 + distal end Greatest anteroposterior diameter of articular 85 — head Greatest transverse diameter of articular head 58 58 Humerus.—The detached proximal end of the right humerus (USNM 23494) does not with any degree of certainty provide a basis for estimating the length of this bone either at the time of death or when physically mature. One Calvert humerus measuring 180 mm. in length and a larger one 220 mm. in length have a head of approximately the same dimensions; the proximal ends of both of these humeri are firmly ankylosed to the shaft. The anteroposterior diameter of the convex head is greater than the transverse. The head is set off from the radial tuberosity by a groove which expands on the internal side into a broad smooth surface. The projecting radial tuberosity is eroded. Radius.—Neither the right nor the left radius was found when this skeleton (USNM 23494) was excavated. A right radius (USNM 23019; fig. 73) from zone 11 of the Calvert formation, 1 )i miles south of the former Plum Point wharf, Md., corresponds in length to the ulna (USNM 23494), but represents a physically mature individual. This ulna measures 275 mm. in length; the greatest anteroposterior diameter of the proximal end is 62 mm. and the greatest transverse diameter is 41 mm. The anterior profile of the shaft curves forward proximally, but is nearly straight on the distal two thirds; the external face is convex and the internal fl
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