1904 | THAXTER: NOTES ON MYXOBACTERIACEAE . 415 
an interrogation. Except for its somewhat larger gross dimen- 
sions, this form, if really a Chondromyces, seems to correspond 
in all respects to C, crocatus, with which it is not compared by 
the author. Until further data are available concerning it, it is 
perhaps best omitted from an enumeration of the species of the 
group. 
CHONDROMYCES AURANTIACUuS (B. & C.) has been collected by 
the writer in Florida and received from the Philippine Islands, 
where it was found by Mr. Reade. This species is also eles 
from the environs of Vienna by Zukal. 
CHONDROMYCES LICHENICOLUS Thaxter has been sent me on 
lichens from Crawfordsville, Indiana, by Dr. Olive, and I have 
myself found it growing on the algal scum covering wet boards 
of a mill race in Weston, Mass. Zukal also reports this species 
from Austria. 
CHONDROMYCES SERPENS Thaxter is reported by Zukal from 
Austria, and I have myself reerety found it again growing on 
an old dung culture. 
CHONDROMYCES APICULATUS Thaxter, or what appeared at the 
time identical with this species, was found by me more than once 
during my stay in Florida a few years since, but as my prepara- 
tions have been unfortunately lost or destroyed, I am unable to 
make sure of the accuracy of this determination. It has also 
been obtained on deer dung from the Philippine Islands. 
EXPLANATION OF PLATES XXVI AND XXVII. 
PLATE XXVI,—Chondromyces catenulatus Thaxter, 
Fic. 1, Pseudoplasmodium rising to form pseudofructification. A+ 4. 
Fic. 2. A young pseudofructification in which the elongating ultimate 
rod-masses are beginning to branch before cyst formation. A+ 4. 
Fic. 3. An older stage in which cyst formation is almost completed. 
A+4. 
Fic. 4. A small chain of mature cysts. D+ 4 
Fic. 5. Rods from rising mass. Leitz +5 oil+ 4. 
PLATE XXVI.—Chondromyces pediculatus Thaxter. 
Fic. 6. Pseudofructification grown in saturated atmosphere, the sub- 
cylindrical cysts in process of formation. A+ 4. 
Fig. 7. Normal form in which cysts are forming, the cyst and pedicel 
already differentiated. A+ 4. 
