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PATAGONIAN EXPEDITIONS I PALEONTOLOGY. 
Venus difficilis (II & III) V subsulcata, Cretaceous, Chili. 
x Venus arenosa (III) V landbecki , Cretaceous, Chili. 
x Meretrix pseudocrassa (III). . . .M. alta, Cretaceous, Chili; M. crassa, Pliocene, Chili. 
x Dosinia magellanica (II) D. semilcevis, Navidad. 
x Lutraria undatoides (II) L. undata, Chili (Navidad beds ?). 
x Panopea ibaria (II). 
x Panopea subsymmetrica (III). 
x Patella pygmcea (III). 
x Callio stoma 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 exigua (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. 
Ac tee on chilensis (II) identical species in the Navidad beds; A. turgidus, Eocene, 
Europe. 
Bulla remondi (II) identical species in the Navidad beds ; B. striaiissima, 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. 
