DESCRIPTION OF SPECIES. 71 



with borders entire, sliglitly undulate, 11"'" lt>ng- from the base to near the 

 taper-pointed apex (destroyed), and 5'™ broad below the middle. The 

 secondaries are strong, parallel, equidistant, diverg-ino- from the median 

 nerve at an angle of 50°, nearly straight to above the middle, then curving 

 in bows which follow quite near the Ixirders, anastomosing in sinqjle areoles. 

 The leaf is comparable also to species of Apocynophyllum and of Rhamnus, 

 especially B. Erldcuil of the Miocene of Europe, which, like Juglans, appears 

 first in the Cenomanian and becomes abundantly x-epresented in the Upper 

 Cretaceous and Lower Tertiary. 



Habitat: Ellsworth Coimty, Kansas. No. 782 of the collection of the 

 museum of the University of Kansas; E. P. West, collector. 



JUGLANDITES SINUATUS, sp. nOV. 



PI. XXXV, Figs. 9-11. 



Leaflets large, ovate-lanceolate or lanceolate, more or less rapidly nar- 

 rowed in rounding to the base, subfalcate, entire; median nerve strong; 

 secondaries close, camptodi'ome ; nervilles thin, close, sinqjle or forking at 

 the middle, ol)lique to the secondaries, sparingly branching. 



The surface of these leaves is distinctly undulate, the lamina becoming 

 prominent or inflated between the lateral nerves. These emerging from the 

 median nerve at an angle of .50° to 60° run straight toward the borders, 

 where they abruptly curve quite near the margin, l)eing mostly simple, but 

 traversed by thin, oblique nervilles. Th.e leaves are 9'^" to 12°™ long" or 

 more, none being preserved entire. As seen from the fragment (Fig. 1 1) the 

 apex is obtuse, but this fragment has the secondaries more distant, more 

 distinctly ramose, and although the nervilles are of the same character it 

 may represent another species. J^ig. 9 seems, by its curve to one side, to be 

 a lateral leaflet of a compound leaf I have, however, from Mexico, speci- 

 mens of a species of Rhamnus as yet undetermined, whose leaves are very 

 similar in character to those described above, some of them being falcate, as 

 in Fig. 9. 



Habitat: Pipe Creek, Cloud County, Kansas. No. 4086 of the col- 

 lection of Mr. R. D. Lacoa 



JUGLANDITES LACOEI, Sp. nOV. 



PI. XLVIII, Fig. 5. 



Leaflets small, linear-oblong, rounded in narrowing to the base or short 

 petiole, obtuse and abruptly short acuminate; borders entire; midril) deep 

 and narrow ; secondaries numei-ous, curved, camptodrome. 



