56 BULLETIN OF THE 



Heer, Fl. Bornst., p. 20, Plate IV. fig. 10, diifering by the borders being 

 minutely crenate and the nervilles less distant. 1 specimen. 



108. Ehamnus rectinervis, Heer. 1 specimen. 



Juglandeae. 



109. Juglans rhamnoides, Lx. 3 specimens. 



110. Juglans, species undetermined. 1 specimen. 



111. Carya antiquorum, Newby. 1 specimen. 



112. Pterocarya retusa, sp. nov. Terminal leaflet large, ovate-lanceolate; 

 the lateral small, linear-oblong, blunt at apex, rounded-subtruncate at base; 

 lateral nerves close, parallel at a broad angle of divergence, branching near 

 their ends ; surface rugose. 



The leaflets are thick, denticulate or crenulate on the recurved borders, the 

 lateral nerves, at an angle of 50°, are not more than 5 mm. distant in the 

 small leaves ; deeply marked. It is closely allied to P. Americana, Lx., U. S. 

 Geol. Surv. of the Terr., p. 290, Plate LVIII. fig. 3, diff'ering by the open prox- 

 imate nerves. By its rugose surface and its nervation also, the species is 

 related to Juglans corrugata, Lndw. Palseont., VIII., Plate LXX. figs. 11, 12, 

 differing especially by the leaves being blunt or obtuse, not acummate as in 

 the European species. 6 specimens. 



Pomaceae. 



113. Cratwgus betulcefolia, sp. nov. Leaves subcoriaceous, variable in size, 

 oblong lanceolate, or enlarged toward the base, pyramidal-lanceolate above, 

 deeply acutely or obtusely dentate, trinervate from the base, pinnately nerved 

 from the middle ; primary and secondary nerves craspedodrome entering the 

 teeth ; lateral primaries with few branches. 



The leaves vary in size from 3^ to 7 cm. long, and from 2^ to nearly 4 cm. 

 broad below the middle. All the nerves are deeply marked, the teeth some- 

 what long, rather obtuse, either turned outside or upward. 21 specimens. 



114. Gratcegus myricoides, sp. nov. Leaves membranous, small, ovate-lan- 

 ceolate, more or less deeply dentate, penninervate ; lateral nerves simple or 

 forking, oblique and straight to the borders, or curving inside before entering 

 the teeth ; teeth alternately larger, or large and bi-tridendate on the back. 



The two leaves representing the species are only 2 to 3 cm. long, 1^ cm. 

 broad, fragmentary. They resemble leaves of Betula ; but the irregular ner- 

 vation is that of Myrica, the two lower pairs of nerves being longer and enter- 

 ing the teeth, the upper shorter, curved, and effaced near the borders, all at 

 unequal distance, not parallel. They have some likeness to the leaves of Gra- 

 tcegus oxyacanthoides, Goepp., Schoss. Fl., Plate XXXVI. fig. 1. 2 specimens. 



115. Gratcegus Engdliardti, sp. nov. Leaves of medium and small size, 

 subtrilobate or simply ovate, enlarged above the base, rounded and abruptly 

 deflexed to the petiole ; trinerved at base or pinnately nerved, the lower lateral 



