. The Deseado formation of Patagonia . Fig. 89. P. wingei—natural size; .4, first molar;B, third molar. stead of which the external face is excavated species are described, based on isolated upper teeth. P. wingei Ameghino p. wingei Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. wingei Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 485. This species is founded on a couple of isolated molars,probably belonging to the same individual. The followingmeasurements are given: Upper molar i, lengthUpper molar 3, length 22 mm., width 26 mm., width 29 mm. P. cingulatus Ameg
. The Deseado formation of Patagonia . Fig. 89. P. wingei—natural size; .4, first molar;B, third molar. stead of which the external face is excavated species are described, based on isolated upper teeth. P. wingei Ameghino p. wingei Amegh., 1895, Bol. Inst. Geog. Argen., t. 15, p. wingei Amegh., 1897, Bol. Inst. Geog. Argen., t. 18, p. 485. This species is founded on a couple of isolated molars,probably belonging to the same individual. The followingmeasurements are given: Upper molar i, lengthUpper molar 3, length 22 mm., width 26 mm., width 29 mm. P. cingulatus Amegh., loc. cit. above, is based on an in-complete upper molar, probably the second, which is dis-tinguished by having the internal cingulum excessivelydeveloped. It measures 30 mm. in length. 132 THE DESEADO FORMATION OF PATAGONIA Lophocoelus Ameghino Lophocoelus Amegh., 1904, Anal. Soc. Cient., Rep. Argen., t. 58, p. Amegh., 1904, Anal. Mus. Nac, ser. 3, t. 3, p. 352. The genus is founded on a single upper third molar
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