MICHIGAN ACADEMY OF SCIENCE. 
205 
branch is formed which grows upward and arches over towards the thin 
slender branch. Yuillemin calls this arched branch the female copu- 
lating branch. Towards it a short stump-like branch grows from the 
slender branch. The zygospore is formed from a part of the female 
branch. After the copulation a new branch grows out from the female 
branch which in turn forms new copulating branches and eventually 
zygospores. This is repeated several times until a sympodially branched 
j^/orfe 2T 
zygospore carrier is formed with several zygospores which are situated 
on the ends of arched branchlets. 
Dr. A. Fisher suggested that the difference in size and shape of the 
two copulating branches and the formation of the zygospores on upright 
sympodial branched zygospores carriers are characters of such import- 
ance as to justify the making of a new genus for this form. A similar 
heterogamus copulation is noticed in the genus Dichranophora as 
pointed out by Schroter. 
