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PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
2. Comparison of Other Localities with the Type Fauna 
at Santa Cruz. 
(In the following P means characteristic Patagonian, according to v. 
Ihering ; X means characteristic Suprapatagonian, according to Ameghino 
or v. Ihering ; J means characteristic Juliense, according to Ameghino ; 
L means characteristic Leonense, according to Ameghino.) 
Pescadores , Rio Santa Cruz ; ca. 50' above high tide. 
Only Ostrea ingens has been found here. 
Paso del Rio Santa Cruz : 2 miles above Las Salinas (see below), at 
about high tide level. 
J Schizaster ameghinoi. L& S Ostrea ingens. Turritella breantiana . 
J Terebratella patagonica. S Lucina proniaucana. Turritella patagonica. 
Malletia ornata. L Turritella ambulacrum. L Struthiolaria ornata. 
All of these 9 species are found at Santa Cruz, and 5 of them are Pata- 
gonian, 2 of which are Juliense, and 3 Leonense, while 2 are Suprapata- 
gonian. Since this locality represents a very low horizon, close to the 
water’s edge of the Santa Cruz River and the sea, the presence of Leon- 
ense and Suprapatagonian species is very significant. 
Las Salinas ; 30 miles above mouth of Santa Cruz River, ca. 200' above 
high tide. 
J Rhynchonella plicigera. 
S Cucullcea darwini. 
Limopsis insolita. 
P Cardita incequalis. 
P Cardium puelchum. 
Venus meridionalis . 
Psammobia patagonica. 
Marlesia patagonica. 
L Turritella ambulacrum. 
Turritella breantiana. 
L Struthiolaria ornata. 
P Siphonalia domeykoana. 
All of these 12 species were found at Santa Cruz. This locality is at 
a much higher level than Paso del Rio Santa Cruz, but has 3 fossils in 
common with it ( Turritella ambulacrum and breantiana , Struthiolaria or- 
nata), two of which are Leonense according to Ameghino. 6 specimens 
are Patagonian, 1 of which is Juliense, while 2 are Leonense. Cucullcea 
darwini is a Suprapatagonian fossil according to v. Ihering. Thus we 
have here a mixture of fossils from all three subdivisions. 
Mount of Observation , lower horizon ; from between tides to 25' above 
tides. 
