ORTMANN : TERTIARY INVERTEBRATES. 303 



The result of the foregoing considerations is : We regard tlic Patago- 

 nian beds as of Lower Miocene age ; contemporaneous deposits are found, in 

 the southern hemisphere, not only in Chili (within the Navidad series], but 

 also in New Zealand (Pareora beds of Htitton] and Australia, and the 

 fatmas of these three localities (Sotith America, New Zealand, and Aus- 

 tralia] show unmistakable affinities with each other. We shall return to 

 this fact below. 



THE MAGELLANIAN BEDS. 



The " Magellanian beds," discovered by Mr. Hatcher near Punta 

 Arenas, were first described by the present writer in 1898, and the term 

 "Magellanian beds" was introduced by him in 1899, and accepted by 

 Hatcher (1900 a, p. 97). The stratigraphical position of these beds has 

 been ascertained positively by Hatcher: they are several hundred feet 

 below the Patagonian beds, and separated from them by the Punta 

 Arenas coal (Upper Lignites of Hatcher, 1. c., p. 99). 



Ameghino (1899, p. 12) has referred to this Punta Arenas section, and 

 has attempted to correlate it with his subdivisions of the Patagonian for- 

 mation, and, indeed, practically identifies our Magellanian beds with his 

 " Patagonian formation." 



It is hardly necessary to pay any attention to this entirely unwarranted 

 opinion (see : Ortmann, 1899, p. 427, first footnote). In what Ameghino 

 calls his Piso Juliense in the Punta Arenas section (our horizon I), not a 

 single Juliense species is present, but only plant remains have been found. 

 What he calls Piso Leonense (our horizon II) does not contain a single 

 Leonense fossil ; what he calls transitional beds between Patagonian and 

 Suprapatagonian formation (our horizon III) contains only a single Pata- 

 gonian species (Cardita elegantoides spec, nov.), but no other Patagonian 

 or Suprapatagonian fossils. Such correlations are simply ridiculous, not 

 to mention the fact that Ameghino's subdivisions, as has been demon- 

 strated above, have no reality at all. 



The following is the fauna of the Magellanian beds. (II = lower hori- 

 zon, 111 = upper horizon.) 



RELATIONS. . 

 x Ostrea torresi (III) 0. bellovacina, Low. Eocene, Europe. 



Cardita elegantoides (III) identical species in the Patagonian beds. 



x Lucina neglecta (II) L. promaucana, Patagonian beds. 



