274 PATAGONIAN EXPEDITIONS : PAL/EONTOLOGY. 



locality that differs in the character of the deposits is the next, near San 

 Julian. 



San Julian, Oven Point; near the water's edge, not over 10' above 

 high tide. This horizon is distinctly lower than any of the beds at Santa 

 Cruz. Facies : sandy, with shell-fragments. 



* Cidaris antarctica. Heteropora pelliculata. * Turritella patagonica. 

 Toxopneustes precursor. J * Terebratella patagonica. S * Struthiolaria ameghinoi. 



J Scutella patagonica. L & S * Ostrea ingens. J Siphonalia noachina. 



J *Schisaster ameghinoi. J & S Pec ten geminatus. * Trophon patagonicus. 



Serpula patagonica. Mytilus magellanicus. * Valuta gradlior. 



Terebella magna. * Gibbula l&vis. Balanus varians. 

 * Aspidostoma giganteum. * Infundibulum corrugatum. 



Although this locality represents the lowermost horizon of the whole 

 series known on the coast of Patagonia, we have here no less than 3 

 species, which are Suprapatagonian, according to Ameghino and v. Iher- 

 ing. For the rest, Juliense species prevail. Of the 20 species, 12 

 (marked *) have been found at Santa Cruz. 



San Julian, Darwin Station; at a higher horizon than Oven Point. 

 Matrix resembling that of Santa Cruz. This horizon seems to be about 

 the same as the lowermost part of the Santa Cruz section. 



* Cidaris antarctica. *Panopea quemadensu. Murex hatcheri. 



J Hypechinus patagonemis. *Dentalium sulcosum. * Trophon patagonicus. 



Serpula patagonica. S * Sea/aria rugulosa. Fusus archimedis. 



J * Terebratella patagonica. *Natica ovoidea. * Valuta gradlior. 



Heteropora pelliculata. * Turritella sp. * Cancellaria gracilis. 



J *Pecten pranuncius. Vermetus incertus. Scalpellumjuliense. 



J& S *Pecten geminatus. S * Struthiolaria ameghinoi. Balanus varians. 



* Corbula hatcheri. *Pyrula Carolina. * Geryon peruvianus. 

 *Panopea regularis. J Siphonalia noachina. 



Of these 26 species, 17 are also found at Santa Cruz (marked *). Again 

 here, Juliense species prevail ; typical Leonense species are wanting, but 

 3 characteristic Suprapatagonian species are present. 



It is impossible to decide which one of these two localities near San 

 Julian is to be regarded as the type-locality of Ameghino's " Piso Juli- 

 ense." Both contain a number of Juliense fossils (each 5), of which 3 

 ( Terebratella patagonica, Pecten geminatus, Siphonalia noachina] have 

 been found at both. The fact that the matrix at Darwin Station ap- 



