(164) 



their diameter, although in other respects the characters would agree 

 pretty well. 



We are not aware that the species has been found in fruit since it 

 was first gathered by Dr. Richardson, although it has been frequently 

 looked for in the same spot. 



SPHACELARIA HACKMOSA. 



EXPLANATION OF DISSECTIONS, &c. 



Fig. 1. — Sphacelaria racemosa, tuft, natural size. 

 2. — Portion with spores. 

 3. — Apex of a bianch. 

 4. — Spores. All magnified. 



