42 Later Extinct Floras of North America, 



nolds, L T . S. A., ae his specimens represent both surfaces of the 

 basal portion of the leaf, and rations fragments of its central 

 and outer parts. All these specimens correspond, in every im- 

 portant particular, with those from Bellingham Bay, except that 

 they prove the leaf to have been considerably larger than I had 

 before supposed ; larger indeed than any fossil fan-palms hitherto 

 described. In the west coa>t specimens the petiole is 1^ inch 

 broad, while in those brought from the upper Missouri, the pe- 

 tiole is from 1^ to 2 inches broad, and all parts of the leaf propor- 

 tionally strong. All the specimens from both the localities I have 

 mentioned, show the petiole to have been flat, and without the 

 central keel of S. major and S. Lamanonis. This, with its larger 

 size, leads me to consider our plant as distinct from either of its 

 European representatives. It is at least as much unlike either, 

 as they are unlike each other. But, if specifically distinct, this 

 must be regarded as an interesting representative species, con- 

 firming the conclusions derived from the other identical and 

 allied species, of the parallelism of our Tertiary plant-beds 

 with the lower Miocene strata of Europe. 



Fan-Palms are a conspicuous feature in the flora of the 

 tropics, growing in the greatest abundance under the equator, 

 but they also spread through the subtropical, and into the tem- 

 perate zones, being very abundant in the Southern United 

 The discovery of fossil Fan-Palms by the party under 

 ('apt. Raynolds is an importanl fact, however, as Dr. Qayden 

 had not found them in his pre vions explorations of the country 

 bordering the Upper Missouri, though making large ami inter- 

 ting collections of fossil plants from the Miocene Tertiaries, 

 Formation <//<</ Looality. Miocene Tertiary beds. Hanks 

 of Yellowstone River. (Dr, Eayden.) 



Thuya Interrupta (n. sp.) 



Branchiate flat, narrow, linear, pinnate, opposite, except at the sum- 

 mil of the branch somewhat remote, connected only by the Blender 

 woody axis on which the leaves of the branchless are not decurrenl ; 

 Leaves in tour rows, appreued, those of the upper and Lower ranks 



