54 



Gteinitzia, Hecr, species (?). 



In the grayish bituminous clays .of the upper Dakota group near Sioux 

 City, which, as remarked formerly, are filled with undeterminable fragments, 

 especially of rootlets and branches of Conifers, I have found some rhomboidal 

 scales, 2 centimeters wide each way, broadly rounded at the upper border, 

 obtuse on the sides, narrowed downward to the spur of the scales, which at 

 its base is obtuse and 2 millimeters wide. The whole surface is marked by 

 prominent small ribs, curving along the borders and descending into the spur 

 of the scale, becoming of course less curved toward the middle of the scale. 

 These costee, transformed into bitumen or amber, are thread-like or cylindri- 

 cal, leaving a groove upon the stone when dug out of it. Their appearance is 

 like the ribbed surface of the scales of Geinitzia formosa, Heer, a new genus 

 and species, admirably illustrated by the author in Kreide flora v. Quedlinburg, 

 (p. 6, PL ii, Figs. 4, 6.) As I could obtain but a single scale, preserved well 

 enough to recognize its form, I can only remark on its characters, in order to 

 direct the researches to better determined organs of a form which probably 

 represents some new and remarkable kind of Conifers. 



Phyllocladus subintegrifolius, Lesqx., PL i, Fig. 12. 



Leaf oval, oblong, tapering from below tbe middle to a sbort thick petiole, abruptly rounded and 

 undulate above, coriaceous ; medial nerve narrow, scarcely distinct ; lateral veins very close and thin, 

 simple, a fow more prominent or thicker, all running to tho borders. 



Phyllocladus subintegrifolius, Lesqx., American Journal of Science and Arts, 



he. cit, p. 92. 



The leaf is 3| centimeters long from the end of the petiole, which 

 measures J centimeter, 11 millimeters broad at the middle, and abruptly 

 obtusely pointed; the lateral veins are very close, more or less indistinct, 

 apparently simple, very thin but irregular in thickness, passing to the borders 

 by a slight downward curve in an acute angle, of 30°. The borders of the 

 leaf are entire, only undulate near the top, and in this differ from the species 

 of Phyllocladus or Salisburia now known, which are all more or less lobate 

 and denticulate. From all the species of Podocarpus, which this leaf re- 

 sembles by its outline, it differs by its nervation, which is evidently of the 

 Phyllocladus type. The lateral veins are apparently rendered indistinct by 

 the coriaceous texture and the somewhat wrinkled surface of the leaves, as 

 is generally the case in species of this genus. 



Habitat. — Near Decatur, Nebraska, Haydcn ; a single specimen. 



