1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 229 



OELASTRUS BOREALIS, Heer. 

 Hekr, F1. Foss. Alask., p. 'M. PI. x, fig. 4. 

 Port Graham; H, Fiirnhjelin. 



ILICINE.^:. 



ILEX INSIGNIS, Heer. 

 Hkkr, F1. Fos.s. Ala.sk.. p. 37, PI. x, Hg. 1. 

 Port Graham; H. Furuhjehii. 



ZIZYPHl S TOWNSENDI, new s].ecieK. 

 PI. IX, figs. 8, 9. 



Leaf thin, eniptical-lanceohite in general outline, rounded or slightly 

 heart-shaped at base, extending above into an acuminate apex; petiole 

 slender, 9 mm. long; margin of leaf cut into numerous sharp, usually 

 outward-pointing' teeth, Avhich are separated by rounded sinuses; three- 

 ribbed from the base; midrib straight, lateral ones of the same size as 

 the midrib, equally dividing the distance between it and the margin, 

 and, curving around, enter the apex; tiner nervation obsolete. 



This tine species, which 1 take pleasure in naming in honor of the 

 collector, is well shown in the two figures given. The leaves appear to 

 have been thin but firm. They are narrowly elliptical in outline, with a 

 rather slender ])etiole about 1 cm. long. In size they vary from 3-5 cm. to 

 5 cm. in length and from l-a cm. to 2-2 cm. in width. They are well 

 characterized by the teeth and the three ribs of equal size from the base. 

 Figure 9 differs from all the others in having a very thin fourth nerve 

 outside of the prominent ones. Unfortunately, nothing of the ultimate 

 nervation can be made out. 



This species approaches closely to the living Zizyphus Jajjonica, 

 Thunbg., of Japan, which ditters in being less regularly elliptical and 

 in having only weak teeth. 



Among fos.sil species this species has many that are seemingly 

 closely related. It is, for example, very similar to Z. .scrrnlatus, Ward, * 

 from the Fort Union Groui), near the mouth of tlie Yellowstone River, 

 Montana, which differs in being broader, with tiner, more numerous 

 upward-pointing teeth. Prof. Ward's species also shows a tendency to 

 be five-nerved by the addition of slender nerves outside of the more 

 prominent ones. Z. cinnamomoules, Lx.,t from the Green River Group 

 in Colorado is also similar, but differs in being wedge-shaped at base, 

 with fewer, sharper teeth. Some of thefarmi^ of Z.paradi.siacus, Ung.,| 

 are quite suggestive of this species, and differ in being wedge-shaped at 

 base, with fewer, sharper teeth. Z. liyperhoreus., Heer, § from the Miocene 

 of Greenland, which might be expected in Alaska, is not particularly 



*Types of the Laramie Flora, p. 73, PI. xxxiii, figs. 3, 4. 

 t Tert. V\., p. 277, PI. ui, figs. 7, 8. 

 } Cf. Pilar, Foss. FI. Susodaua, p. 107, PI. xiv, tig. 14. 

 ^ Fl. Foss. Arct. vii, p. 130, PI. lxvii, tig. 6. 



