. Bulletin. Science; Natural history; Natural history. 86 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 1. Holotype humerus (LACM \22995) of Fulmarus miocaenusn. ,\ view, right, palmar view. Greatest length = mm. broader proximally and have a marked depression on the anconal surface of the shaft immediately below the head, a depression which is not present in the two Recent species of Fulmarus or in the fossil at hand. Also, in Daption, the point of the deltoid crest is less sharply hooked. The prominently projecting deltoid crest, with its hooklike point, is also present in
. Bulletin. Science; Natural history; Natural history. 86 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 1. Holotype humerus (LACM \22995) of Fulmarus miocaenusn. ,\ view, right, palmar view. Greatest length = mm. broader proximally and have a marked depression on the anconal surface of the shaft immediately below the head, a depression which is not present in the two Recent species of Fulmarus or in the fossil at hand. Also, in Daption, the point of the deltoid crest is less sharply hooked. The prominently projecting deltoid crest, with its hooklike point, is also present in members of the genus Pterodroma. The two species of this genus available for comparison {P. phaeopygia and P. lessoni), however, resemble the shearwaters in the long, pointed ectepicondylar prominence and blade-like proximal anconal extension of the entepicondyle. Other petrels, such as Pagodroma nivea, Halo- baena caerulea, and Pachyptila vittata, lack the hooklike quality of the deltoid crest, although it is more pointed in these species than in the shearwaters. The Pagodroma humerus is further distinguished from the fossil by the depression of the shaft below the head. In Pachyptila vittata the bicipital crest is short as in Puffinus, and in Halobaena caerulea the pectoral attachment is longer and nar- rower than in the fossil humerus, and the ectepicondylar prominence is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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