24 PKOCEEDINGS OF THE NATIOMAL MUSEUM vol. 73 



This form somewhat resembles Myrcia costatoides Engelhardt -^ 

 of the lower Miocene of Chile, but is much larger and stouter with 

 a much longer petiole. It does not conform to the features of any 

 Myrcias with which I am familiar. There are, of course, leaves of 

 this general type in various unrelated existing genera. Some figs 

 have similar leaves, e. g., the existing Ficus puleheUa Schott, but the 

 venation is not quite the same and the inframarginal vein is usually 

 farther within the margins and arched from secondary to secondary. 



Somewhat similar leaves occur in various Myrtaceae and Gutti- 

 ferae, but the type is especially characteristic of a considerable num- 

 ber of genera of the Apocynaceae and can be exactly matched among 

 existing species of PJumiera and Allamanda. For these reasons I feel 

 justified in referring it to the form genus Afocynophyllum. 



Nothing of this kind was found in the supposed Miocene flora from 

 Mirhoja, Territory of Chubut.-° All of the existing genera with 

 leaves like the fossil find their home in the warmer parts of South 

 America, and none extend farther southward than northern 

 Argentina. 



Occurrence. — About 3 miles north of Estancia Chalia, Eio Chalia, 

 Territory of Santa Cruz. 



Cotypes.—Q^i. No. 37873 U.S.N.M. 



Order PERSONALES 

 Family BIGNONIACEAE 



Genus BIGNONITES Saporta 



BIGNONITES CHALIANUS, new species 



Plate 5, Figure 6 



Leaflets of medium size, ovate, widest medianly and about equally 

 pointed at the apex and base. Margins entire. Texture subcoriace- 

 ous. Length about 7 centimeters. Maximum width about 3.5 centi- 

 meters. Midvein stout, prominent. Secondaries about 5, mediumly 

 stout camptodrome pairs; the basal pair are stoutest and opposite 

 and run close to and parallel with the lower lateral margins to the 

 middle of the leaf, simulating lateral primaries. Tertiaries thin, 

 usually forming a double series of meshes between adjacent 

 secondaries. 



This form presents features allying it with various existing genera 

 of Bignoniaceae of the existing flora in the warmer parts of South 

 America. Several genera range southward as far as northern 

 Argentina. 



-6 Engelhardt, H., Abb. Senck. Naturf. Gesell., vol. 16, Heft 4, p. 680. pi. 9, fig. 6, 1894. 

 ^ Berry, Edward W., Johns Hopkins University Studies in Geology, No. 5, pp. 185-252, 

 pis. 1-9. 1922. 



