Ortmann — Some new marine Tertiary horizons. 481 



Natica chiloensis Phil, (also in horizon III). 

 Struthiolaria spec. nov. 

 Actceon chilensis Phil. 

 Bulla remondi Phil. 



This fauna again . differs from that fonnd in the third 

 horizon, although there are three species (out of ten) identical. 

 Glycimeris ibari is the only form previously recorded. Five 

 species (Dosinia c, Trochita c, Natica c, Actozon c, Pullar.) 

 have been found in the Navidad beds of Chile, while none of 

 them has been found in Patagonia. 



The list of fossils from Magellanes (Punta Arenas, Skyring 

 Water, etc.) given by Philippi"*) contains 17 species, one of 

 which {Turritella patagonica) was inserted by a mistake (cf. I.e., 

 p. 77), while Pectuncidus ibari and magellanicus are identical, 

 thus leaving 15 species. Seven of these are represented in our 

 collection, namely : 1. Haliotis imperforata (= Crepidula gre- 

 garia, 2. Venus chiloensis, 3. Panopaw, ibari (= Glycimeris 

 ibari), 4. Pectuncidus ibari, 5. Ostrea bourgeoisi ( = 0. phil- 

 ippii), 6. Ostrea patagonica (probably = Cape Fairweather 

 oyster), 7. Ostrea torresi. 



No. 1, 2, 4, 5 and 6 are represented in the fifth horizon, No. 

 7 in the third horizon, No. 3 in the second horizon. 



In connection with the general stratigraphical observations 

 made by Mr. Hatcher, the paleontological facts set forth above 

 seem to warrant the following conclusions : 



1. There are represented, on the banks of the Kio de las 

 Minas, near Punta Arenas, three different horizons yielding 

 marine fossils, the uppermost of which may be subdivided into 

 three subdivisions, and two horizons characterized by plant 

 remains. The characteristic fossils of the series 

 the following table : 



Horizon : 



( c. Oyster bed, composed of the Cape Fairweather oyster. 

 Y ! b. Marine fossils : Ostrea philippii, Pectuncidus ibari y 

 '] Crepidula^etc. 



[a. Oyster bed, composed of Ostrea philippii. 



IV. Punta Arenas coal. 

 III. Marine bed with Ostrea torresi 



II. Marine bed with Turritella, Natica chiloensis, Struthio- 

 laria, etc. 

 I. Bed with plant-remains. 



2. The marine fossils described by Philippi from this locality 



*L. c, p. 251. 



