48 PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 



INTRODUCTION. 



THE Tertiary Invertebrates collected by Mr. J. B. Hatcher in Pata- 

 gonia come chiefly from the so-called Patagonian beds (including 

 the Suprapatagonian beds of Ameghino), and from what should 

 be regarded as the type-localities of these beds : the mouth of the Santa 

 Cruz River, and the neighborhood of San Julian. Besides, there are 

 smaller collections from deposits both below and above the Patagonian 

 beds, especially from marine horizons first discovered by Mr. Hatcher, 

 which have been called " Magellanian " and "Cape Fairweather" beds 

 respectively. 



In order to give the most accurate indication of the localities that have 

 yielded the fossils I shall point out here the position of the different places 

 mentioned in the text, and shall refer the reader to the map of southern 

 Patagonia published by Hatcher (1900 a, pi. i), where most of the local- 

 ities are indicated. 1 



1. Mouth of Santa Cruz River ; situated at about 50 S. L. on the east- 

 ern coast of Patagonia ; bluffs on the south side of the river, from water's 

 edge to about 250' above high tide. (See description of locality by Hatcher, 

 1900 b, p. 264.) 



2. Pescadores; a little below Las Salinas (see below), on the Santa 

 Cruz River; ca. 50' above high tide. 



3. Paso del Rio Santa Cruz ; 2 miles above Las Salinas, at about high 

 tide level. 



4 Las Salinas; 30 miles above the mouth of the Santa Cruz River; 

 ca. 200' above high tide. 



5. Mount of Observation ; ca. 50 miles S. W. of Santa Cruz, on the 

 eastern coast of Patagonia. 



6. San Julian, Oven Point; ca. 50 miles N. E. of Santa Cruz. 



7. San Julian, Darwin Station; ca. 10 miles to the south of the latter 

 locality. 



'The geographical location of "Jegua quemada," "La Cueva," and "Jack Harvey," given 

 frequently by v. Ihering (according to Ameghino) for Patagonian fossils is unknown. Mr. 

 Hatcher has tried to ascertain their situation, but failed to do so. 



