304 PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 



x Venus difficilis (II & III) V. subsulcata, Cretaceous, Chili. 



x Venus arenosa (III) V. landbccki, Cretaceous, Chili. 



x Meretrix pseudocrassa (III). . . .M. alta, Cretaceous, Chili ; M. crassa, Pliocene, Chili. 



x Dosinia magdlanica (II) D. semilavis, Navidad. 



x Lutraria undatoides (II) L. undata, Chili (Navidad beds ?). 



x Panopea ibaria (II). 



x Panopea subsymmetrica (III). 



x Patella pygmcea (III). 



x Calliostoma philippii (III) C.fricki, Navidad ; C. observations, Patagonian beds. 



Infundibulum merriami (II identical species (/. costellatum Phil.) in the Navidad beds ; 

 and III) /. filosum, Miocene, California. 



Natica chiloensis (II and III) . . identical species in Chiloe ; N. venusta, Eocene, Europe. 



x Turritella exigita (II) T. granulosa, Eocene, Europe. 



x Struthiolaria hatcheri (II) possibly ancestral form of the Patagonian species of the genus. 



x Fusus subspiralis (II) F. oxytropis, Navidad. 



Act&on chilensis (II) identical species in the Navidad beds ; A. turgidus, Eocene, 



Europe. 



Bulla remondi (II) identical species in the Navidad beds ; B. striatissima, Eocene, 



Europe. 



Of these 19 species, 3 have been found in both horizons. One is found 

 in the Patagonian beds of Santa Cruz, 4 have been found in the "Navi- 

 dad beds" of Chili, while the rest (14, marked x] are restricted to this 

 locality. Of these, 4 show relations to Navidad species, 2 relations to 

 Patagonian species. One of the Navidad species (Infundibulum merri- 

 ami] shows affinities to a Miocene California species, 5 species show re- 

 lations to European Eocene species, and even Cretaceous affinities are not 

 wanting (3 species). 



Although the number of species known from these deposits is quite 

 small, the comparatively more numerous affinities to deposits of older age 

 (Eocene and even Cretaceous) agree well with what we know of the 

 stratigraphical conditions ; the Magellanian beds are older than the Pata- 

 gonian, and further, one fact needs special mention : while the lithological 

 character of the deposit, especially of horizon II, agrees strikingly with 

 that of the type locality of the Patagonian beds at Santa Cruz (hard con- 

 cretions, filled with shells, imbedded in looser material), some genera 

 found in both localities (Punta Arenas and Santa Cruz) are represented 

 by different species, for instance : 



Venus difficilis V. darwini (Santa Cruz). 



Dosinia magellanica D. meridionalis. 



Infundibulum merriami /. corrugatum. 



