86 



P. Harveyi, Bailey, var. arietina, Harv. 



Both of the preceding species common in the bay ; the varie- 

 ty at Polpis. L, L. D. 

 P. elongata, Grev. 

 P. violacea, Grev. 



These two species found at Siasconset ; both rather rare. 



L. L. D. 

 P. variegata, Ag. 



Common in the bay. 

 P. atrorubescens, Grev. 



Siasconset ; not common. L. L. D. 

 P. nigrescens, Grev. 

 P. nigrescens, Grev., var. affinis, Ag. 



Type and variety both common. 



DASYA, Ag. 



D. elegans, Ag. CHENILLE. 

 Abundant ; a very handsome plant. 



CORALLINA, Lamour. 



C. officinalis, L. 

 Siasconset ; rare. L. L. D. 



MELOBESIA, Aresch. 



M. Lejolisii, Rosanoff. 

 Common on Zostera. 



M. membranacea, Lamour. 



Siasconset on Phyllophora membranifolia ; very rare. Other 

 species of Melanesia are often brought to notice under this 

 name, but there is no authenticated report of its previous oc- 

 currence on our coast. The frond is very thin, so that the 

 color of the plant on which it grows shows through plainly, 

 while M. farinosa is opaque and easily crumbles, M. pustulata 

 is thick and stony, and M. Lejolisii, which it most nearly re- 

 sembles, occurs on Zostera only, not on algae. 



