OLIVE COLORED ALG.^E. 101 



an olive green color with a yellowish tendency, which 

 is even more pronounced in the dried than in the 

 living plant. Its unmistakable mark is the little 

 wart-like protuberances which are thickly scattered 

 over all the stems and branches, making it deci- 

 dedly rough to the sense of both sight and touch. 

 It is found on our coast south of Cape Cod only ; 

 not very common in most places, but at Orient, L. I., 

 in Peconic Bay, Miss Booth reports it growing in 

 unUmited quantities, in July and August. 



Syih-Oxdex.— ASPEROCOCCE^. 

 Genus.— ASPEROCOCCUS* Lam. 



There are two species of this genus on our 

 eastern coast and one in California. Only one is 

 common with us here ; the other, therefore, A. 

 compressus, which has been reported only at Glou- 

 cester, will not be described. 



ASPEROCOCCUS ECHINATUS,t GrEV. 



Fiond flat or inflated, from three inches to one 

 or two feet long, and from one-eighth to half an 

 inch wide ; blunt at the apex, and attenuated toward 

 the base. It may be known by its light olive color 



* Asperococcus = Rough-seeded, 

 t Echinatus = Prickly. 



