12 TWELFTH ANNUAL REPORT. 



No. 3912. Salix yrotecefolia, Lesq. 



The above three Nos. are from the north 

 side of the Cottonwood river in Brown county. 



No. 5155 (A). Populus litigiosa, Heer, and Cinnamomum 



Scheuchzeri, Heer, on the reverse. 



No. 5155 (B), 5155 (H), 5157 (B). Magnolia alternans, Heer, 



No. 5155 (C). Populus elegans, Lesq. 



No. 5155 (D). " Lancastriensis, Lesq., (probably equi- 



valent to P. cordifolia, Newby). 



No. 5155 (F). Frotophyllum crednerioides, Lesq. ?, a fragment; 



base of leaf destroyed. 



No. 5155 (G, K). Populites cyclophyllus, Lesq. 



No. 5155 (I). 2 fragments of superposed leaves, the lower 



only distinct, Cinnamomum Scheuchzeri^ Heer. 



No. 5155 (L, M, 0). Populus litigiosa, Heer, 3 specimens. 



No. 5155 (P). Populus cyclophylla, Lesq, a deformed plicate 



leaf. 



No. 5155 (Q & S) 2 fragments of the same leaf, Piatamis primes 

 va, Lesq., with a leaf of Persea?, not yet satis- 

 factorily determined, upon 5155 (S). 



No. 5155 (E, N, R). 3 undeterminable fragments. 



No. 5156. Cissus, sp. nova; name not yet fixed. 



No. 5157 (C). Salix proteoefolia, Lesq., with a branch of Pla- 



tanus on the reverse. 



No. 5157 (A). Andromeda Parlatorii, Heer. 



No. 5158. Laiirus, sp. uov., not yet named. 



No. 5159. Fragment of undeterminable leaf, areolated by 



maceration, Ficus??. 



No. 5160, Leaf of Pinus, sp. nov., not yet named. 



No. 5161. No vegetable remains, but shell or some animal 



organism. The osseous plate marked by stria? 

 is 2 mm. thick. I have seen along the banks 

 of the Cottonwood river, above the Cretaceous 

 sandstone bearing leaves, large fragments of 

 shells as thick as the plate upon 5161. 



No. 115. Sequoia, sp. nov., a specimen which I have al- 



ready seen here. It bears the label Austin, 

 Minn. 

 As far as I can see now, the specimens remarked above, 36 in 



number, represent 16 species, of which 4 are new ones. Of the spe- 

 cies, 10 have been recognized in the Dakota group of Kansas and 



Nebraska, and two in the same Cretaceous formation of Colorado. 



