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PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 
teristic Suprapatagonian, while 4 are Patagonian (2 Juliense and 2 Leon- 
ense). The presence of 7 species in these beds ( Scutella patagonensis , 
Terebratella patagonica , Ostrea ingens , Panopea quemadensis , Scalaria 
rugulosa, Voluta gracilior , Balanus varians ) is most significant, since 
these have been found also in the lowermost beds of the whole series at 
San Julian. 
Thus the palaeontological evidence — if we follow Ameghino’s divisions — 
is in conflict with the stratigraphical. 
jo miles north of tipper Rio Chalia; beds corresponding to the last 
locality : immediately below Santacruzian beds, top of marine series. 
* Cidaris anatarctica. 
J Scutella patagonensis. 
J * Terebratella patagonica. 
* Glycimeris ibari. 
L&S* Ostrea ingens. 
* Psammobia patagonica. 
* Panopea quemadensis. 
S * Scalaria rugulosa. 
* Infu ndibid um corrugatu m . 
S *Natica danvini. 
L * Turritella ambulacrum. 
* 7 'urritella patagonica. 
S * Struthiol aria ameghinoi. 
* Trophon patagonicus. 
Balanus varians. 
Although this list differs a little from that of the last locality (8 species 
in common), there is much resemblance between both as regards matrix, 
etc., indeed, both belong apparently to about the same level in the marine 
series. 
Of these 15 species, 13 have been found at Santa Cruz (marked*); 4 
are characteristic Suprapatagonian, while 4 are Patagonian (2 Juliense and 
2 Leonense). The conclusions are identical with those drawn from the 
last locality. 
Canon near Sierra Oveja, Rio Chico; extreme top of the series: these 
beds are interstratified with Santacruzian beds containing Mammalian 
remains. 
J ^Terebratella patagonica. J & S * Pecten geniinatus. S * Scalaria rugidosa. 
L&S * Ostrea ingens. P * Cardium puelchum ( ? ). J Siphonalia noachina. 
These beds, which ought to be, by all means, Suprapatagonian, contain 
only a single form that is characteristic of the Suprapatagonian beds, 
while 2 species are found in both Patagonian and Suprapatagonian, and 
2, Terebratella patagonica and Siphonalia noachina , at the base of the 
series, in the “ Piso Juliense ” of Ameghino. The presence of these two 
species at this locality is entirely opposed to Ameghino’s conception of 
Patagonian and Suprapatagonian beds. 
