RED ALG^^. 259 



Davis finds it in Gloucester, as late as July. And 

 Miss Booth, in August, at Peconic Bay, and Prof. 

 Eaton, in Eastport, Maine, in August and September. 



Callithamnion floccosum, Ag. 



This species is reported only in our northern 

 waters, from Boston Bay northward. It is a very 

 slender, remotely, much branched plant, very flaccid, 

 and from four to six inches high. At the base, the 

 branches are half an inch apart, but more crowded 

 towards the top. This fact, together with the flaccid 

 nature of the frond, makes the ramuli gather in floc- 

 culent masses at the ends of the secondary branches. 

 This gives the plant a very uneven appearance. 



The main stems of the tuft are most frequently 

 twisted together into a little rope. The tops of the 

 cells in the branches and branchlets just below 

 where they join the cell above, are armed with a 

 single pair of opposite ramuli. These are from one- 

 twentieth to one-tenth of an inch long, simple or 

 unbranched, spine-like, slender and sharp. This fact 

 very readily distinguishes this species from either of 

 the foregoing, whose ramuli are much branched. 



Several marks distinguish it from the next species, 

 C. cruciatum, viz. : its larger size ; its different geo- 

 graphical habitat ; and the fact of its having but a 



