408 BOTANICAL GAZETTE [JUNE 
typical form on the same antelope dung from Africa which yielded C. apzcud- 
atus, and under conditions that made its African origin unquestionable. The 
species is totally distinct from C. crocatus, with which Dr. Zukal would unite 
it, both in the form and character of its cysts and cystophores, as well as in 
its color, and is in general very constant, although what appears to be a vari- 
ety of the same form accompanied the Liberian material and differs from the 
fact that it is larger and often copiously branched, one “individual” thus 
producing a number of heads. 
CysToBACTER Fuscus Schroeter. Plate XXXT, figs. 37-39 
Schroeter Kryptogamenfl. v. Schlesien, III Band. 1 Lief. p. 170. 
Color orange red becoming chestnut brown, the rising rod 
masses pale flesh colored. Cysts formed by the separation of 
the parts of a more or less convoluted rod mass, nearly spherical 
to long-oblong or irregularly elongated at maturity, surrounded 
by a gelatinous matrix, heaped together or lying in one plane on 
the substratum, each cyst surrounded bya thin, papery, separable 
chestnut-brown wall; when dry dark dull red. Rods slender, 
elongate, 0.6 by 5-12. Cysts 50-150 by 50-70. 
On dung of rabbits from southern California. 
This interesting form made its appearance in abundance, together with 
Myxococcus coralloides, Pilaira Cesatii, and several other interesting plants, 
on rabbit dung from southern California, for which I am indebted to Mr. F. 
H. Billings. It is a conspicuous species, growing and producing its cysts 
readily on agar, and seems to correspond in all essentials to the generic type 
which I formerly called Myxobacter from the fact that its cysts are embedded 
at maturity in a mucusenvelope. Its characters seem to be so nearly anaes : 
with those of Schroeter’s species that I have no hesitation in referring it 
_ C. fuscus, which, it may be remarked, was also found on the same oo 
Assuming that this reference is correct, Myxobacter must be superseded by 
the earlier name, under which should be included Cystobacter aureus and C. 
simplex. 
Myxococcus stipitatus, nov. sp. Plate XXXT, figs. 30-33- 
Color white to pink or flesh color. Spore mass beco 
deliquescent, subspherical, formed at the apex of a well 
_ developed stout stalk which raises it free above the substratum. 
Rods 0.5-07 by 2-7 or longer. Spores oval, 0.8-1.2 by I~ ae 
1.154. Spore mass about 175 Ri in diameter. Stalk 100-200 y 
as 
