PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 
27O 
Natica solida (= N. darwini ). 
Struthiolaris ameghinoi. 
Marginella quemadensis. 
Marginella confinis. 
Marginella gracilior. 
Marginella plicifera. 
Voluta ameghinoi. 
Of the 1 1 7 species found at the type-locality of Santa Cruz (see our 
list, p. 266 f.) the following are mentioned in v. Ihering’s list of character- 
istic Patagonian fossils : 
Cucullaria tridentata (= Cucullcea darwini). 
Area patagonica. 
Pecten centralis (= P. proximus). 
Lucina promaucana. 
Amathusia angulata. 
Dosinia meridionalis . 
Seal aria rugulosa. 
Cuctdlcea alta. 
Pecten geminaUts. 
Cardita incequalis. 
Lucina ortmanni. 
Cardiutn puelchum. 
Venus patagonica. 
Dosinia Iceviuscula. 
Struthiolaria ornata. 
Siphonalia domeykoana. 
These are nine species (all of those mentioned by v. Ihering), eight of 
which also occur in our collections, only Venus patagonica not being rep- 
resented. 
On the other hand, of v. Ihering’s characteristic Suprapatagonian fossils 
the following have been found at Santa Cruz, according to our collection : 
Cuctdlcea darwini. 
Area patagonica. 
Pecten proximus. 
Lucina promaucana. 
Amathusia angulata. 
Dosmia meridionalis. 
Scalaria rugulosa. 
Natica darzvini. 
Struthiolaria ameghinoi. 
Marginella gracilior. 
Marginella plicifera. 
That is to say, all the characteristic Suprapatagonian species, with only 
three exceptions ( Marginella quemadensis and confinis , Voluta ameghinoi ) 
have been found here. 
This result shows at a glance , that v. Ihering' s list of characteristic fos- 
sils for both supposed formations does not hold good. 
Comparing Ameghino’s characteristic fossils with our list of the Santa 
Cruz fauna we find the following species represented there : 
fuliense species : 
Schizaster ameghinoi. 
Terebratella patagonica. 
Pecten prcenuncius . 
Pecten geminatus. 
A 
► 4 out of 9. 
