C. byssoideum, Arn. 



Brant Point, L. L. D. ; where the three preceding species are 

 also found. 



0. corymbosum, Lyng. 

 Brant Point ; rather common. 



C. seirospermum, Griff. 



(Dr. S. Durkee in Nereis B-A.) 



C. tenue, Harv. 



A rare species, first discovered in America some thirty years 

 since, by Mr. Samuel Ashmead at Beesley's Point, New Jer- 

 sey ; not again heard of till reported by Mr. L. L. Dame in 

 October, 1868 ; subsequently found also in Nantucket by 

 Mrs. Lusk (Farlow, Manual) ; since detected at East Fal- 

 mouth, Mass. , and at Atlantic City, N. J. Until a specimen 

 is found with cystocarpic fruit, it is doubtful whether the 

 species belongs to this genus or the next. 



GRIFFITHSIA, Ag. 



G. Bornetiana, Farlow, 



Rather common. Sterile plants of this species somewhat re- 

 semble the last. 



CERAMIUM, Lyng. 



C. rubrum, Ag. 



Common and variable. 

 C. strictum, Harv. 

 C. fastigiatum, Harv. 

 C. tenuissimum, Ag. 



These last three species are common, but C. fastigiatum is 



seldom found in fruit. 



SPYBIDIA, Harv. 



S. filamentosa, Harv. 



Common in the harbor, etc. 



