1897 | OBSERVATIONS ON THE MYXOBACTERIACEZ 407 
flattened basally, caducous. Rods minute, slender, 0.6 by 2-5. 
Cystophore 25~40u high. Cysts average about 25 by 35m. 
On rabbit dung, Arlington, Mass. 
This minute and well marked species made its appearance on a labora- 
tory culture of rabbit dung which it covers with a powdery orange coating. 
It appears to be constant in its characters, and is abundantly distinct from 
any of the other known species of the genus. 
Chondromyces erectus (Schroeter). Plate XXX, figs. 16-19. 
Cystobacter erectus Schroeter, Kryptogamenfi. v. Schlesien, III Band, 1 
Lief. p. 170. 
Color orange red turning to chestnut brown. Cystophores 
fascicled, united at the base in groups, above simple or sparingly 
branched, bearing a single terminal broadly oblong or rounded 
cyst on a broad base. Cystophores withering at maturity so 
that the cysts often appear sessile. Rods 0.9 by 2~5y or longer. 
Cysts average about 50 by 4ou. Cystophore 60-3004 or more 
in height. 
On horse dung in laboratory cultures. Cambridge, Mass. 
This species has appeared repeatedly in laboratory cultures within the 
past few years and seems abundantly distinct from its nearest ally C. aurantia- 
cus, its fascicled habit, single terminal cysts, and the chestnut brown color of 
the latter when mature serving to distinguish it readily from any of the vari- 
eties of C. aurantiacus with which I am familiar. The cysts of the latter 
Sometimes become brown with age, but in the present instance they assume 
this color as soon as they are mature. 
CHONDROMYCES AURANTIACUS (Berk. & Curtis) Thaxter. 
In my former paper on the Myxobacteriacez it was suggested that this 
Species was probably synonymous with Sti/éum rhytidospora figured by Berke- 
ley and Broome in their Fungi of Ceylon, as well as with the Polycephatum 
@urantiacum of Kaichbrenner and Cooke described from African specimens. 
Professor Morgan. It has also made its appearance in abundance and in the 
*Grevillea ar: 124. foes. 
