RED ALG^. 261 



the fact that at the end of every branch the ramuli 

 crowd together and make a Uttle dense or thickened 

 mass, giving the branch an appearance not unlike that 

 of a minute peacock's feather, — the pinnas standing 

 a little apart all along the rachis, and then gathering 

 close about the end, form the well-known " eye " of 

 the miniature feather. There is certainly something 

 like this in a well-mounted specimen of C. cruciatum. 

 It is a summer plant. Miss Booth reports it not 

 common in August, at Orient. I have never col- 

 lected it 



CVIXITHAMNION BaILEYI, HaRV. 



This plant, which is certainly very common all 

 through the waters of southern New England and New 

 York, is by no means rare in MassEichusetts Bay. It 

 is a well marked species, and cannot easily be con- 

 founded with any other Callithamnion of our coast. 

 It will usually be found two, or at most, three inches 

 high, and of a pyramidal outline. 



It has a stout stem, larger than a bristle, which 

 runs quite through the plant to the top. From all 

 sides of this there spreads out widely, a series of stout 

 branches, longest at the base of the plant, but getting 

 rapidly shorter as we approach the top. This gives 

 the plant its pyramidal form. If separate branches are 



