Laguna Marine Laboratory 215 
Herposiphonia sp. 
(Figure 123) 
This was found in tow-stuff from the tide-pools, so that it is prob- 
ably an epiphyte on other alge growing in such situations. 
Lophosiphonia obscura (Ag.) Falk. 
Common on low rocks of higher tidal zone, growing in dense col- 
onies and acting as a sand gatherer. 
Figure 129. Callithamnion rupicolum f. pygmaeum Collins. 
Lophosiphonia villum (J. Ag.) S. and G. 
Oceurs intermingled with L. obscura. 
Heterosiphonia secunda (Suhr) Falk. 
Frequent as an epiphyte on various algw, especially corallines. 
Dr. Setchell remarks that ‘‘this is the plant which has passed in our 
lists under the name of Dasya subsecunda. The name given in the 
list is merely a synonym. There seems to be some reason for sus- 
pecting that our plant is not identical with the type of the species 
given, but belongs rather to H. pulchra of the Japanese coast.”’ 
