. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. AMERICAN MUSEUM NOVITATES [No. 127 Fore limb, total length from humerus to extremity of phalanges, 250 mm, Psittacosaurus; 245 mm. Protiguanodon. (9) Pelvic girdle of character- istic iguanodont type, elongate ilium, pre- and postpubic extension, elongate ischium. (10) Hind limb, total lengt
. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. AMERICAN MUSEUM NOVITATES [No. 127 Fore limb, total length from humerus to extremity of phalanges, 250 mm, Psittacosaurus; 245 mm. Protiguanodon. (9) Pelvic girdle of character- istic iguanodont type, elongate ilium, pre- and postpubic extension, elongate ischium. (10) Hind limb, total length, ^^70 mm. Psittacosaurus; 435 mm. Protiguanodon. (11) Manus in both genera with 4 free carpalia, Digit I, 2 ph., , 3 ph., , 4 ph., , reduced, 1 vestigial ph. (12) Pes in both genera enlarged, elongate, 4+ free tarsalia in Proiiguan-. PS/TTACOSAURUS MONGOUCNS/S TYPC AMETR. MUS tfZ5-# Fig. 1. Type skeleton of Psittacosaunis niongoliensis Osborn (Amer. Mus. 6254). Since the original description the skeleton has been completely exposed and is very accu- rately represented in this figure as it lies in the matrix. The original pencil drawing is full size; the present figure is reproduced one-eighth natural size. The missing parts are represented in dotted lines. odon, tibio-tarsus closely united but not coalesced. Digit I, 2 ph., , 3 ph., , 4 ph., , 5 ph., , vestigial mts., 0 ph. (13) Osseous tendons extending from fourth or fifth thoracic through the sacral series to the anterior caudal. The above practically common characters, which indicate a marked affinity between these two animals, are accompanied by certain differ- ences in proportion of the fore and hind limbs as shown in the following table of measurements:. 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 Central Asiatic Exp
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