58 Rhodora [APRIL 
marizes what we have noticed, except the Am. Nat. and Prodromus 
citations, which were unknown to him; and copies Wood's figure 
as Pl. XXXIV, fig. 213. In a later paper! he completes his record by 
giving the two missing citations. 
In Oct., 1906, Prof. F. D. Lambert called my attention to some 
algae growing in a sunken wooden tub near Tufts College, and on 
examination I found that among these were filaments bearing slender 
hairs like those represented in Wood's figures. Unfortunately there 
was no fruit, and soon after that time the water froze, and nothing 
more could be done. Visits in the spring of 1907 showed no fruit, 
but in Sept., 1907, considerable material was obtained with fairly 
plentiful but not quite mature fruit. The four spiral lines on the 
spore were not visible, but otherwise everything agreed with the 
descriptions. About a week later the station was visited in the hope 
that the ripe fruit might be found: the tub had been covered over and 
a path made across it; the locality was destroyed. | 
'l'he identification cannot be considered as absolutely certain, but 
there is no described species that has the characters of the Tufts 
College plant, and these characters all agree with those of Oc. Н unti 
at the same stage of development, so that there is at least a strong 
probability of identity. The terminal hairs are very peculiar; they 
consist of a series of ten or more superimposed, long, cylindrical cells, 
each somewhat smaller in diameter than the one below; the effect 
is like that of a many-jointed spy-glass, pulled out to the full length, 
except that the terminal cell is much more slender in proportion to the 
basal cell; not a twentieth of the diameter. Several species are figured 
with terminal hairs in Hirn's monograph, but none at all resembling 
this. It is curious that though this structure is plainly shown in Wood's 
figures and their copies in later authors, descriptions all simply say 
“long apical seta" or some equivalent phrase. If any one should 
observe an Oedogonium with setae of this character, it is to be hoped 
that. diligent care will be taken to obtain the mature fruit, and that 
no “improvements” will take place in that vicinity until the fruit is 
gathered. 
MALDEN, MASSACHUSETTS. 
1 Studien ueber Oedogoniaceen, |. с., Vol, XXXIV, р, 38, 1906. 
