APPENDIX 561 



f Tnterntherium. Santa Cruz (? U. Mioc), S. Amer. 

 Fam. Hegetotheriidae. llegetotheres. 



f Hegetother'utiit. Santa Cruz (? U. Alloc), S. Amer. 



f Pachi/ruk/ios. Santa Cruz (? U. Mioc), S. Amer. 

 Fam. Typotheriidae. Tvpotheriids. 



f 7'//ji<)l/i< riu/n. Pampean (V Plioc & Pleist.), S. Amer. 



XXIV. Ordkk LITOPTERNA. Litopterns, with palseothere- and horse-like 



grinding teeth. 



Fam. Proterotheriidae. Proterotheres. 



f proterotheriuni. Santa Cruz (? U. ISIioc), S. Amer. 



f DladiapJiorus. Santa Cruz (? U. Mioc), S. Amer. 



f TlKHitherium. Santa Cruz (? U. Mioc), S. Amer. 

 Fam. Macraucheniidae. Macrauchenids. 



f Theosodon. Santa Cruz (? U. Mioc), S. Amer. 



f Scalahrinitherium. Pampean (? Plioc. & Pleist.), S. Amer. 



t Macrauchenia. Pampean (? Plioc & Pleist.), S. Amer. 



XXV. Order PYROTHERIA. Pyrotheres, Mastodon-like South American 



Ungulates.! 



Fam. Pyrotheriidae. Pyrotheres. 



f Carolozitlelia. Notostylops Beds (? Bas. Eoc), S. Amer. 

 f Propiirotherlum. Pyrotheriuin Beds (? U. Eoc), S. Amer. 

 f Pyrolhcrlum. Pyrotherium Beds (? U. Eoc), S. Amer. 

 d. Cohort CETACEA. Whales and Dolphins.^ 



XXVI. Order ZEUGLODONTIA (Archaioceti). Archaic Cetaceans. 

 Fam. ' Zeuglodontidae ' ( = Basilosauridffi) . Zeuglodons. 



f Protocetus. U. Eoc, N. Afr. 



I Prozeuglodon. U. Eoc, N. Afr. 



■\ ' Zeuffludon' (= Basilosaiirus). U. Eoc, N. Amer., Eur., N. 

 Afr.; Tertiai-y, New Zealand. 



XXVII. Ordki: -ODONTOCETI' (=Denticeti). Toothed Whales. 

 Faai. Squalodontidae. Squalodonts. 



f Squalodon. U. Eoc, N. Amer. ; Mioc, Eur., Austral, 

 f Prnsr/iinlndon. Mioc, S. Amer. 



1 VUi" (raudry, A., Fossilesde Patasonie: Le Pyrotheriuin, Ann. de Pal^ontolor/ie (Marcellin 

 Boule), tome IV, 1!K)9; for review and summary of this, see Gregory, W. K., in Science, n.s., Vol. 

 XXX. 1!K)9, pp. 180-182. 



2 Vide Weher, Die Siingetiere, liKM ; Heddard, F. E., Tlie Book of Wluiles, New York. I'.HH) : and 

 Beddard in Canil)ri(lge NatiuTtl History, volume Mamnuils; Flower and Lydekker, Introdiietioii 

 to the Study of Mammals, 18i)l. 



2() 



