THE MARINE ALG.Ii OF ESSEX. 23 



There is a specimen from Felixstowe in Mr. Hope's collection 

 that has been named CoraUiita squamata by that gentleman, but as 

 the attachment is wanting and the specimen otherwise far from 

 typical of C. squamata^ I prefer to regard it as a variety of C. 

 officinalis, although possibly it may really be a form of C. squamata. 



C. rubens, L., " Syst. Nat.,'' ed. xii., i., p. 1,304. Harwich, 

 1876, E. G. Varenne ; Dovercourt, (i. P. Hope. 



C. corniculata, L, "Syst. Nat.," ed. xii., i., p. 1,304. Dover- 

 court, G. P. Hope. 



SPECIES LIKELY TO OCCUR ON ESSEX SHORES. 

 The following species may be expected to occur on the coast of 

 Essex. Those which, having been found on the shores of the neigh- 

 bouring counties of Suffolk, Norfolk, or Kent, are most likely to 

 be met with in Essex are distinguished by an asterisk (*). 

 MYXOPHYCEx*:. 

 * Dermocarpa schousboei, Bornet. 



Oscillatoria tiigroviridis, Thw., and other species of Oscillatoria. 

 * Lyngbya majtiscula, Harv. 



Hydrocokum lyngbyaceum^ Kiitz 

 * Calothrix confervicola, C. Ag. 

 *C. co/isociata, Born, et Flah. 



C. ivruginea, Thur. 



C. Crustacea^ Thur. 



C.fasciculata, Agardh. 



Rivularia biasokttiana, Menegh. 



Microchoite grisea, Thur. 

 * AnabcEua toruiosa, Lagerh. 



Nodularia spumigena, Mert. 



CHLOROSPERME.E 



Pringsheimia scutata, Rke. 



Monosfroina ivittrockii^ Born. 



M. iatissiinum, Wittr. 

 *M. grevillii, J- Ag. 



M. blyttii, Wittr. 

 * Percursaria percursa, Rosen v. 



EjiteroDiorpha hopkirkii, M'Calla. 



E. ralfsii, Harv. 



E. crinifa, J. Ag. 



*E. Jtiicrococca, Kiitz. 



