26 PKOCEEDINGS OF THE NATIONAL MUSEUM vol. 7S 



ficiently characteristic features to warrant even a surmise as to their 

 botanical affinity. They may be briefly characterized as follows: 

 Outline linear lanceolate, widest medianly, acutely and about equally 

 pointed at the apex and base. Margins entire. Texture relatively 

 coriaceous. Length 4 to 5 centimeters. Maximum width 2.t5 to T 

 millimeters. Petiole stout, about 3 millimeters in length. Midvein 

 mediumly stout. Balance of the venation obscure ; a few thin oblique 

 camptodrome secondaries can be made out, thus ruling out compari- 

 sons with members of the family Myrtaceae, which are represented 

 in most South American Tertiary floras, including that described 

 from the supposed Santa Cruz beds of the Territory of Chubut.^* 

 They might represent the leaflets of some Sapindaceous genus, and 

 they are also not unlike those of the Anacardiaceous genus Schin- 

 opsis, which is represented by good material from the Miocene of 

 Chubut.=^° 



Occurrence. — Southeast side of Rio Nirihuao, 150 yards southwest 

 of Casa Piedra, about 12 miles south of Lago Nahuel Huapi, Terri- 

 tory of Rio Negro. 



Cat. No. 37878, U.S.N.M. 



PHYLLITES species 6 Dusen (?) 



Phyllites, sp. 6. Dus^n, Schwed. Siidpolar Exped., vol. 3, lief. 3, p. 18, pi. 1, 

 fig. 3, 1908. 



A specimen indistinguishable from the one recorded by Dusen 

 from the Tertiary of Seymour Island, Antarctica, but too frag- 

 mentary to be reliable, is present in the collection from near Mata 

 Amarilla, upper Rio Chalia, Territory of Santa Cruz. Cat. No. 



37879, U.S.N.M.) 



2» Berry, Edward W., Johns Hopkins University Studies in Geology, No. 6, p. 225, pi. 2, 

 flg. 6, 1925. 



30 Idem, p. 208, pi. 1, flg. 2. 



