. The Deseado formation of Patagonia . 18, p. copei Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. copei Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. convexidens Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. convexidens Amegh., 1897, Bol. Inst, Geog. Argen., t. iS, p. holmbergi Tournier, 1905, Bui. Soc. Geo!. France, ser. 4, t- 5, p. holmbergi Gaudry, 1906, Anal. Palaeontologie, t. r, p. 5, To this, the type species, I have assigned all the materialwe found on the Chico del Chubut
. The Deseado formation of Patagonia . 18, p. copei Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. copei Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. convexidens Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. convexidens Amegh., 1897, Bol. Inst, Geog. Argen., t. iS, p. holmbergi Tournier, 1905, Bui. Soc. Geo!. France, ser. 4, t- 5, p. holmbergi Gaudry, 1906, Anal. Palaeontologie, t. r, p. 5, To this, the type species, I have assigned all the materialwe found on the Chico del Chubut, west of Puerto Visser, I50 THE DESEADO FORMATION OF PATAGONIA as enumerated under the generic description. The lowerjaws belonged to an old individual. The humerus andscapulae were found associated, the femur isolated. Of the upper dentition, the only available measurementsare those of Ameghino for the first molar, and the canine. Upper dentition, canine, length 256 mm. Upper dentition, molar i, length 57 mm., width 57 Fig. 103. Upper molar i of the left side—natural size,after .Ameghino. The measurements of the complete pair of lower jawswhich we found are Lower dentition, length from inc. i to m. 3 455 mm. Lower dentition, incisor 2, length 22 mm., width 22 mm. Lower dentition, canine, ant. post. diam. at alveolus 52 mm. Lower dentition, canine, trans, diam. at alveolus 26 mm. Lower dentition, diastema from c. to pm. 3 116 mm. Lower dentition, premolar 4, length 28 mm., width 26 mm. Lower dentition, molar i, length 43 mm., width 28 mm. Lower dentition, molar 2, length 58 mm., width 32 mm. Lower dentition, molar 3, length 70 mm., width 36 mm. Height of mandible under molar 3 83 mm. The scapula is a very long heavy bone, with a narrowblade, and a high spine which has its upper margin thick-ened so as to ajopear like a banister rail. We found onecomplete scapula and a second incomplete one associatedwith it, which corresponded in all ways to the first one. PARASTRAPOTHE
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