226 
Notes. 
ON THE ANTHERIDIA OP LOME NT ARIA. —At Woods 
Holl, Mass., this summer (July 26, 1890), while examining material 
of Lomentaria uncinata , Menegh., collected in Vineyard Sound, tips 
Fig. 2. Several camera lucida outline sketches of antheridia-bearing tips. 
Fig. 3. Central longitudinal section through an antheridia-bearing tip. 
bearing antheridia were discovered. From the literature at my com- 
mand and from inquiry, it would appear that the antheridia of 
Lomentaria have seldom been seen, consequently a brief note on 
their position and structure may not be without interest. 
They are found usually at the ends of the branches of the frond, 
