408 BOTANICAL GAZETTE [JUNE 
look with no small interest, and perhaps with some misgivings, 
to such further taxonomic vicissitudes as may be in store for 
them. 
Since the publication of his last paper, the writer has made no 
further detailed study of the group, having merely reexamined 
his preparations in order to assure himself that he had not been 
guilty of such blunders as were, perhaps unconsciously, attributed 
to him in Dr. Zederbauer’s account. Although he has thus 
nothing new to add in relation to the general characteristics of 
the group as a whole, further careful study of these organisms is 
much needed, especially in connection with the movements of 
the rods and with their detailed cell characters. It seems by 
no means impossible that the pale pinkish coloring matter which 
appears to be invariably associated with the contents of the 
vegetative cells may be similar to bacteriopurpurin, and that these 
organisms may perhaps prove very near relatives of the Rhodo- 
bacteria; although there appears to be no indication of the 
presence of sulfur in the cell. It may be further remarked 
that the writer feels somewhat more inclined than formerly to 
entertain the suggestion, previously made, that these organisms 
may possibly represent transitional conditions between the higher 
bacteria and the lower Mycetozoa; having been partly influenced 
in this opinion by an examination of Dr. Olive’s preparations of 
Diplophrys and the Sorophoreae, which seem to indicate that 
there may not be so wide a difference in cell structure between 
these groups as has been assumed. 
Within the past few years a certain number of new forms has 
been accumulated, a majority of which are illustrated in the 
present contribution. In addition to these, two species of Chon- 
dromyces have also been met with; one of which was collected 
by Mr. A. F. Blakeslee on rotten wood in the Island of Mar- 
garita, Venezuela, and is allied to C. crocatus, although possessing 
a simple cystophore and differently shaped cysts; while the 
other, a somewhat amorphous species, was found on mosses 
growing on tree trunks at Intervale, N. H. Neither of these is 
available, however, in sufficient quantity for proper description. 
The species of Myxococcus are also certainly more numerous 
