(85) 



closely, for instance, Fl. Amboy Clays, //. ^9. J. 10. 

 Our leaf is also somewhat similar to some of the Amboy clay 

 leaves which Newberry refers to C. crenatum Heer, though 

 the latter is stouter and averages much larger. 



C. f^randifolium Newb. is of somewhat the same propor- 

 tions but about three times as large. The Dakota species 

 except C. dccurrens are much smaller leaves. The Potomac 

 species are mostly smaller broader leaves of rather obscure 

 affinities. 



Celastrophyllum Newberryanum Hollick. 



Cclastrop/iylliim JVezt/derryamun HoW'ick ; Newb. Fl. Am- 

 boy Clays, loi. pL ^p. _/*. 7-^7. 1896; Trans. N. Y. 

 Acad. Sci. 16: 133.//. 14. f. i. 1897. 

 This small-leaved Cclastrophyllum is abundant in the 

 upper Raritan beds at South Amboy and we would naturally 

 expect it to extend upward into the Cliffwood beds, where it 

 is recorded by Hollick. 



RHAMNACEAE. 

 Rhamnus Linn. Sp. PI. 193. 1753. 



About seventy-tive existing species, mostly north temper- 

 ate, a few tropical and a few south temperate ; eleven inhabit 

 North America. Thirty-three species are found fossil on 

 this continent in the following formations : Island Raritan 

 2, Dakota 6, Montana i, Laramie 10, Denver 6, Ft. Union 

 2, Green River 3, Eolignitic 2, Tertiary i. 



Heer records one from the Tertiary of Manchuria, one 

 from the island of Sachalin, two from Atane, one from Patoot, 

 and eight from the Tertiary of Greenland. 



Rhamnus Novae-Caesareae sp. nov. PL 50. y". 5, 6. 



These leaves are somewhat similar in outline and venation 

 to what Hollick calls .^ercus{?) JVovae- Caesar eae from this 

 same locality, only our specimens are less perfect and consid- 

 erably larger. Their true affinity seems to be with R/iamnus, 

 and I have been unable to associate them with any of the 



