302 SYNOPSIS OF THE VERTBBEATE FAinSTA OP THE PUERCO SERIES. 



OPHIDIA. 



Belagras pi-isHformis Coiie ; Proc. Amer. Phil. Soc, 1883, p. 545 ; Tertiary Vertebrata, 1885, p. T31, PI. XXIV g, 

 fig. 2. Several individuals. 



AAT2S. 



Fragments of bones of a few undetermined species of birds have been found. 



MAMMAXTA. 



? MARSUPIALIA. 



It has been recently discovered that the genus Ornithorhynchus possesses, in an 

 early stage, molar teeth exceedingly similar to those of the genus Ptilodus. I sus- 

 pect foi- this reason, that the Multituberculata belong to the Monotremata rather than 

 to the Marsupialia. This fact, if demonstrated, will account for the taxonomic isola- 

 tion of this group from the known Marsupialia, though some Monotreme has prob- 

 ably given origin to the latter. (See Amer. ]S"aturalist, Feb., 1888.) 



Multituberculata. 



PtUodus medimvus Cope ; Amer. Naturalist, 1881, p. 933 ; Tertiary Vertebrata, p. 173, PI. XXIII d, fig. 1. Five indi- 



viduals. 

 Ptilodus trovesshrtianus Cope; loc. cit., 1882, p. 686 ; Tertiary Vertebrata, p. 737, PI. XXV f, flg. 19. Two individuals. 



Additional and much more perfect specimens of the lower jaws of this species conflrm its characters as origi- 

 nally defined. 



Neoplagiaulax americaims Cope ; Amer. Naturalist, 1885, p. 493. One individual. 

 Neoplagiaulax molestus Cope ; loc. cit., 1886, p. 451, et infra. Two individuals. 



Chirox pUeatus Cope ; Proc. Amer. Phil. Soc, 1883, p. 331 ; Amer. Naturalist, 1887, p. 566, flg. Two individuals. 

 Polymastodon laiimoUs Cope ; Amer. Naturalist, 1885, p. 385. One individual. 

 Polymastodon taoenais Cope ; loc. cit., 1883, p. 684 ; 1884, p. 688, figs. 3-4 ; Tertiary Vertebrata, p. 732, PI. XXIII c, 



figs. 1-6. Tmniolabis scalper, Amer. Naturalist, 1883, July ; Tertiary Vertebrata, p. 193, PI. XXIII e, fig. 7. 



Catopsalis poUux Cope ; Amer. Naturalist, 1883, p. 685 ; Tertiary Vertebrata, 1885, p. 734, PI. XXIII c, figs. 1-5. 



Twenty individuals. 

 PoUjmastcdon attenuaius Cope ; Amer. Naturalist, 1885, p. 494. One individual. 

 Polymastodon JiMideiis Cope ; Amer. Naturalist, 1884, p. 688. Catopsalis Jissidcns Cope ; Proc. Amer. Phil. Soc, 



1883, p. 333. One individual. 

 Polymastodon foUatus Cope: Amer. Naturalist, 1884, p. 688, fig. 5. Catopsalis foliatus Cope; loc cit., 1883, p. 41G ; 



Tertiary Vertebrata, 1885, p. 171, PI. XXIII d, flg. 3. One individual. 



BUNOTHERIA. 

 Tseniodo7ita. 



Psiitacotherium aspasiiv Cope; Proc Amor. Phil. Soc, 1883, p. 103 ; Tertiary Vertebrata, p. 196, PI. XXIV c, flgs. 



3-4. Two individuals. 

 PsiitacotJieritm multifragum Cope ; Amer. Naturalist, 1883, p. 156 ; Proc. Amer. Phil. Soc, 1881, p. 191 ; Tertiary 



Vertebrata, p. 196, PI. XXIV c, fig. 3 ; Amer. Naturalist, 1888, p. 5, fig. 1. Throe individuals. 

 Psittacotherium megalodus Cope ; Amer. Naturalist, 1887, p. 469. One specimen. 



