Article XL — A NEW SPECIES OF FOSSIL EDENTATE 



FROM THE SANTA CRUZ FORMATION OF 



PATAGONIA. 



By Barnum Brown. 



In the autumn of 1898 the American Museum of Natural 

 History made arrangements with the Princeton University 

 Museum for the writer to accompany the third expedition to 

 Patagonia, under the leadership of Mr. J. B. Hatcher. The 

 expenses of this trip were largely defrayed by Professor Henry 

 Fairfield Osborn. 



A large collection, comprising nine nearly complete skele- 

 tons and nearly a hundred skulls with skeletal material, was 

 secured by the writer from exposures on the Rio Gallegos, on 

 the seashore south of Rio Coy, and from the bluffs along the 

 coast south of Rio Santa Cruz. This material represents most 

 of the families that lived in such great numbers during the 

 Santa Cruz period, and contains several new species. 



By previous arrangement with Professor Scott and Mr. 

 Hatcher, the portion of this material belonging to species 

 already known will be described in the Princeton memoirs, 

 while the new species will be described in the American Mu- 

 seum Bulletin. 



Eucinepeltus complicatus, no v. sp. 



This species is founded on an adult skull with cephalic 

 shield, No. 9248 of the collection of the American Museum of 

 Natural History. The type was found in the talus of cliffs on 

 Rio Gallegos, near Mr. Felton's residence. 



Comparison with the type of the genus, Eucinepeltus pete- 

 satiis, has been possible through the kindness of Professor W. B. 

 Scott, the advance sheets of whose memoir I have examined. 



It differs from the type of the genus in the following charac- 

 ters: 



Eucinepeltus petesatus. Eucinepeltus complicatus. 

 Pattern of teeth: ist to 3rd non-lobate. ist to 3rd-lobate. 



Cephalic shield: 9 plates, not all pitted. 11 plates, all pitted. 



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