310 GEOLOGICAL SURVEY OF THE TERRITORIES. 



figure only of the specimen can give a good idea of- this fragment of 

 cone. It is distantly comparable, for the form and the disposition of its 

 surface-scars, to Avulrostrobus, a genus established by ISchimper for 

 some cylindrical cycadeous male cones, formed of imbricated scales bear- 

 ing sessile anthers on their lower surface. For the position of the fruits, 

 it has a distant relation to Zamiostrohus gibbus, Eeuss., a cone which 

 shows, in its section, oblong seeds, in right angle to the axis, with their 

 tops appearing at the outside surface. Both these cones are figured in 

 Schimper's Yeget. Pal. (PI. LXXII, figs. 1, 2, 14, 15). There is, however, 

 a great difference in the very large size and in the characters of this 

 silicifled strobile with those of a Zamia. It apparently represents a 

 peculiar genus of the Gi/cadiiiece. 

 Habitat. — Found loose around Golden, Dr. F. Y. Hayden. 



7. Sequoia affinis, sp. nov. 



Branches long, slender, pionately branching; leaves short, oblong, 

 imbricated and obtuse; or longer, lanceolate-acute, erect or slightly 

 reflexed ; branchlets bearing cones, open ; strobiles small, round-oval, 

 obtuse; scales large, rhomboidal, with entire borders, a central oval 

 mamilla, and wrinkles i^assing from it to the borders all around ; male 

 branches erect, with more acute and open leaves, resembling sterile 

 branches of Glyptostrobus Europeus, with small, round catkins, covered 

 to the top by imbricated lanceolate leaves. 



This species, of which we have uumerous and admirably well-preserved 

 specimens, is much, like Sequoia Coutske, Heer, of the Bovey -Tracy flora, 

 differing, however, from it by the more obtuse point of the scale-like 

 leaves, by more acute and longer leaves of the sterile branches, by more 

 slender branchlets bearing cones at their ends, by proportionally larger, 

 more oval cones (not globular), by the iudistiuctuess of a middle nerve 

 on the back of the leaves, which appear merely convex or inflated, etc. 

 The seeds are of the same size as those of S. Coutsm; they ditter also 

 somewhat by a cordate base and a mere trace of middle nerve near the 

 top, where it divides and passes on both sides, curving along the borders. 



Habitat. — Middle Park, Dr. F. V. Hayden. 



9. Sequoia acuminata, sp. nov. 



The form of the leaves is about the same as in Sequoia longifoUa; they 

 are, however, generally shorter, narrower, less crowded upon the stems, 

 and especially distinct by the smooth surface of the leaves. In this 

 species, the denudated branches are striate, while, in the former, they 

 bear the scars of the base of the leaves. This difference, however, may be 

 merely the result of decortication in the specimens representing this last 

 species. 



Habitat.— Black Butte. 



10. Sequoia?, species. 



Conesflattened, apparently ]ong,linear-obtuse, marked at the surface by 

 shields of scales, (apophyses.) the only organs preserved. These aresepa- 

 rated from each other, not continuous nor imbricate, rhomboidal in outline, 

 with acute sides, and rounded top, bearing in the middle a round mamilla, 

 from which wrinkled lines are diverging to the borders. The specimen 

 represents two crushed cones, of which nothing can be seen but what is 

 described here. 



Habitat.— Middle Park, Dr. F. V. Hayden. 



