1924] : 
ZELLER & DODGE—LEUCOGASTER AND LEUCOPHLEBS 393 
tissue. The series also illustrates a progression from forms which 
gelatinize throughout to those which finally become dry and 
dusty at maturity. Until a morphological study can be made, it 
seems wise to consider all forms with light-colored and hyaline 
spores enclosed in a definite, globose, gelatinous sheath as species 
of Leucogaster, reserving the dark-colored spore groups for the 
subgenus Phlyctospora of Scleroderma. 
As in our previous work, we have used as a standard for color 
descriptions Ridgway, ‘Color Standards and Color Nomen- 
clature,’ Washington, D. C., 1912. In citing specimens we have 
given the data accompanying the specimens. "Wherever possible 
the location of the specimens has also been given. 
In conclusion we gratefully acknowledge our indebtedness to all 
who have aided us in this work. We are indebted to the Missouri 
Botanical Garden for the use of the library and herbarium; to 
‚ L. К. Abrams for access to the Dudley Herbarium at тавай 
Stanford Jr. University, and to Prof. J. MeMurphy for assistance 
in the study of Harkness' specimens there; to Dr. E. A. Burt for 
access to his private herbarium and for helpful suggestions; to 
the late W. С. Farlow for access to the collections from Hesse in 
the Cryptogamie Herbarium of Harvard University, and, since 
Dr. Farlow’s death, to Dr. R. Thaxter for helpful suggestions and 
for access to his own collections as well as those of the Farlow 
Herbarium; to Dr. H. D. House for the privilege of studying the 
type of Hymenogaster anomalus Peck from the New York State 
useum; to Mr. C. G. Lloyd for access to specimens in the Lloyd 
Museum; to Mr. H. E. Parks for assistance in collecting fresh 
material: and to Dr. W. A. Setchell and to Dr. N. L. Gardner for 
. üccess to the University of California Herbarium. 
КЕү то THE ӨРЕСТЕ8 or LEUCOGASTER AND LEUCOPHLEBS 
l. Peridium s thin, 60-80 и thick, white spotted with yellow, becoming 
on drying, basidia linear-oblong аа TE ae ача cw VET 
Leucogas 
+++, 
* 452 Э-э 5 55859 €5»* 459 95496944 9*9 ^» 
"rt жж» 
2. жойы 6. over 16 ы in Фішейег........................ L. nudus (p. ion 
2. Spores under 16 y. in diameter........ e +++. Я 
3. Peridium of large hyphae (more than 4 и in Фзшейег).................. + 
- Peridium of slender МАСИРИ ны 
