EXTINCT SPECIES. 121 



16. PALJSOTRINGA LITTORALIS MARSH. 



17. PAL^OTRINGA VETUS MARSH. 



18. PAKSOTRINGA VAGANS MARSII. 



19. SULA LOXOSTYLA COPE. 



20. GRACULUS IDAHENSIS MARSH. 



21. GRACULAVUS VELOX MARSH. 



22. GRACULAVUS PUMILUS MARSH. 



* 



23. GRACULAVUS ANCEPS MARSH. 



23bis.* GRACULAVUS AGILIS MARSH. 



24. ICHTHYORNTS DISPAR MARSH. 

 24bis.f APATORNIS CELER MARSH. 



25. PUFPINUS CONRADI MARSH. 



26. CATARRACTES ANTIQUUS MARSH. 



27. CATARRACTES AFFINTS MARSH. 



28. HESPERORNTS REGALIS MARSH. 



29. LAORNIS EDVARDSIANUS MARSH. 



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

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



nithes, of a new subclass, Odontornithes. (Marsh, Am. Jour., Sci. and Arts, v, 



p. 161, Feb., 1873.) 



