200 STEIL: THE ANTHEROZOID OF THE GENUS RICCARDIA 
Both Ricccrdia multifida and R. palmata were, however, 
obtained from Mr. Rapp the past spring and some good prepa- 
rations of the antherozoids of both species were, obtained. 
The antherozoid of R. palmata (Hedw.) Carruth. is almost 
as large as that of R. pinguis, although the body, as Fic. 4 shows, 
is much smaller in diameter. The cilia resemble those of the 
antherozoid of R. pinguis, being 
unequal in length and attached at 
different points. At the point of 
attachment of each cilium, there 
is an enlargement which becomes 
more intensely stained. The ves- 
icle is somewhat rounded off and 
enlarged at the posterior end. 
There is present, approximately in 
the center of the vesicle, a very 
dense, nearly spherical body, which 
may also be readily observed in the 
living antherozoid. 
The antherozoid of Riccardia 
multifida (L.) S. F. Gray (Fic. 5) is 
much smaller than that of either 
of the other two species described. 
The cilia are, however, similar as 
to differences in length and points 
of attachment. A large body is 
found at the base of each of the 
cilia. The vesicle resembles that 
F An antherozoid of Of the antherozoid of R. palmata, 
Riccardia palmata, X 1527 but it contains two nearly spherical 
bodies of different sizes; one, the 
smaller and nearer to the posterior end of the nucleus is almost 
homogeneous, the other and larger body is always in contact with 
the first body and is usually somewhat granular. Since the ori- 
gin of these bodies has not been studied during the course of de- 
velopment of the antherozoid in any of the Riccardia species, 
no further statement can at this time be made concerning them. 
When the antherozoids of these two species are set free from 
the antheridia, they are closely coiled in the form of a flat disk. 
As the antherozoid uncoils, ready for swimming, the body 
