(153; 



Alga within reach, and seems to prefoi' rather deep shady rock-pools, 

 where it can be always covered, and where it can be protected from the 

 Doou-day sun as well as the buffeting of the billows. 



CALLITHAMNION TURNERI. 



EXPLANATION OF DISSECTIONS. 



Fig. l.^Plumulse with favellffi. 



2. — Plumulaj with tetraspores. 



3. — FavelliB. 



4. — Branch of variety ;3. All magaitied. 



VOL. ir. 



