218 first Annual Report 
CORALLINACEAE 
Choreonema thuretii ( Born.) Schmitz 
Common in the middle tidal zone. 
Lithothamnion sp. 
Apparently several species of this genus form a common coating 
on rocks throughout the tidal zone. Dr. Setchell remarks of them, 
‘‘No one knows the species of the crustaceous corallines.”’ 
Amphiroa tuberculosa forma typica S. and G. 
Amphiroa tuberculosa f. frondescens (Kuetz) S. and G. 
The above two forms are common on the rocks of the lower tidal 
zone. 
Corallina officinalis L. var. 
A common coralline among rocks of the middle tidal zone. 
Corallina gracilis Lamx. 
Frequent on rocks toward the lower tide mark. 
Jania crassa Lamx. 
Oceasional on rocks about lower tide mark. 
Jania rubens (L.) Lamx. 
Occurs in middle tidal zone. 
Lithothrix aspergillum J. E. Gray 
Frequent on rocks of the middle tidal zone. 
