692 The American Naturalist. [August, 
and oval, rarely long. Spores formed both in the bottom-yeast 
and in the top-vegetation, they are “ hat-shaped," a form not 
occurring in any other species. 
12. Saccharomyces Hansenii. Zopf. 
_ Zopf: Berichte der Deutschen bot. Gesellschaft, Vol. VI, page 
94-97; 1889, with figures. 
Found in cotton-dust. Spores 1-2 in each cell, ball-formed, 
diam. 2-4».. This species does not give rise to alcoholic fer- 
mentation, but it brings fermentation in a solution of saccha- 
rose, dextrose, lactose, galactose, maltose, mannit, dulcit, and 
glycerin, converting these sugars and the glycerin into oxalic 
acid, the latter being found at the bottom of the solution as 
calcium oxalate when the fermentation is at an end. 
13. Saccharomyces Joergensenii. Lasché. 
Lasché: Der Braumeister, Vol. V, page 242-245. Chicago, 
1892; and Zeitschrift f. d. gesammte Baruwesen, Munich 
1892. With figures. 
Found in “temperance-beer.” Cells 2.5-5.5s. Spore-forma- 
tion: 26? in 20 h., 25? in 17 h., 12? in 4 days Maxim. 28°- 
30°, Min. 8°: “wall ”-fermation in the spore-forming cells 
scarce. Causes no disease in the beer. Gelatine-cultures give 
a “false mycelium.” 
[14. Saccharomyces conglomeratus. Reess. ` 
Reess, l. c. page 82; PL II, fig. 14-16. Winter, l. c. page 70. 
Saccardo, l. c. VIII, page 917. Joergensen, l. c. page 140. 
Cells 5-6». Typical forms appear with more than one bud 
on the propagating cell. It is hardly a distinct species, because 
such forms often are found in old cultures by Hansen, Will, 
and other investigators, mainly in top-vegetation. | 
15. Saccharomyces albicans. Reess. 
Reess; Sitzungsberichte d. phys. med. Gesellschaft — 
1877. Winter, l. c. page 72. 
! For example, see Will’s figures. 
