EXTINCT SPECIES. 121 



16. PALJSOTEINGA LITTOEALIS Maksh. 



17. PALiEOTEINGA VETUS Marsh. 



18. PAL^OTRIKTGA VAGANS Maksu. 



19. STJLA LOXOSTYI.A Cope. 



20. GEACUIiUS IDAHENSIS Maksh. 



21. GRACULAVUS VELOX Marsh. 



22. GRACULAVUS PUMILUS Marsh. 



23. GRACULAVUS ANCEPS Marsh. 

 23bis.* GRACULAVUS AGILIS Marsh. 



24. ICHTHYORlfIS DISPAR Marsh. 

 24bls.t APATORNIS CELBR Marsh. 



25. PUPPIirUS CONRADI Marsh. 



26. CATARRACTES ANTIQUUS Marsh. 



27. CATARRACTES APPINIS Marsh. 



28. HESPERORNIS REGALIS Marsh. 



29. LAORNIS EDVARDSIANUS Marsh. 



*Not In the Key. (Marsh, Am. Jour., Sol. and Arts, v, p. 230, March, 1873.) 



tNot In the Key. This species, with No. 24, represents a new order, Ichthyor- 

 nithes, of a new subclass, Odontomitlies. (Marsh, Am. Jour., Sci. and Arts, t, 

 p. 161, Feb., 1873.) 



