FLORA OF THE KOOTANIE FORMATION. 313 



bundles, scattered around the stem, and on falling off leave marks that 

 are more or less circular in form. The original number of leaves in a 

 bundle could not be made out, as in no case could it be determined 

 whether or not all were preserved. The stems, in proportion to the 

 size of the leaves, are always quite stout, a feature observed in the 

 Potomac forms. 



PI. LXXIII, Fig. 11, shows a portion of one of the stems with the 

 basal parts of some of the leaves still attached. The leaves are in all 

 cases fragmentary, so that their original length could not be made out. 

 Fig. 12 shows a portion of a principal stem and parts of several branches 

 that go off as if they had originally formed a whorl, reminding one of 

 the mode of branching of Cephalotaxopsis. Fig. 13 shows a stem with 

 many leaves. Fig. 14 represents the specimen collected by Mr. Weed 

 at the Grafton locality. 



This plant seems to have been rather common in the Geyser beds and 

 it is one of the most characteristic of their fossils. Conifers seem to be 

 quite rare in these strata and this is decidedly the most common of them. 



Besides the undoubted plant fossils found in the Geyser beds there 

 are two forms of imprints that probabl}' belong to some animal with a 

 thin bivalve shell. They reseml^le most the imprints of the shells of 

 Estheria. If they represent this genus, there are probably two species of it 

 in the Geyser beds. Both are quite small. The larger one has a length 

 of 11 ram. and a maximum width of 6 mm. This is represented by one 

 specimen. The other shows three imprints. It is more nearly circular 

 in form than the larger imprint and has dimensions 4 mm. by 6 mm. 



SDMAIAEY AND CONCLUSIONS. 



The list of plants found in the Geyser strata contains the following 

 forms : 



1. Dicksonia montanensis Font. n. sp. | 10. Nilsonia schaumburgensis (Dunk.) 



2. Dicksonia pachyphjdla Font. ! Nath. 



.3. Thyrsopteris elliptica Font. | 11. Zamites arcticus GOpp. 



4. Cladophlebis falcata montanensis i 12. Cj^cadeospermum montanense Font. 



Font. n. comb. 



5. Cladophlebis heterophylla Font. 



6. Cladophlebis constricta Font. ? 



7. Equisetum Phillipsii (Dunk.) Brongn. 



8. Equisetum Lyellii Mant. 



n. sp. 

 1.3. Cephalotaxopsis ramosa Font. ? 

 14. Nageiopsis longifolia Font. 

 1.5. Nageiopsis montanen.sis Font. n. sp. 

 16. Laricopsis longifolia latifolia Font. n. 



9. Lycopodite.s '? montanensis Font. n. sp. ' var. 



