oF ey” 
7 
q 
i 
MARINE ALG OF THE L.M.B.C. DISTRICT. 1 
Ceramium and Cladophora almost from the time of their 
commencing to grow..’ Species belonging to “ the genera 
Ceramium and Callithamnion are only about one-half the 
size of well-grown plants belonging to the same species 
found in the above named localities.” I quite agree with 
Marrat in thinking that ‘“‘the matted bases of close- 
growing and intertwined slender species would form a 
very prolific source of novelties.” Marrat also calls atten- . 
tion to the ‘‘large mud-covered banks of Bromborough and 
Wallasey pools, upon the sides of which many beautiful 
but minute microscopic forms are exclusively found. Caves 
near the sea, only occasionally supplied with salt water, 
are fertile sources for the obtaining of the rarer species.” 
Whilst recently investigating the shores of Puffin Island, 
I was particularly struck by the fact, long ago pointed out 
by Forbes, namely, that the shore between high and low 
water mark could be divided into zones characterised 
by the luxuriant development of one or more especially 
prominent genus, as, for example, the Laminaria zone at 
extreme low water mark, the Fucus zone above, followed 
by other zones characterised by the presence of Rhodo- 
phycez and Chlorophyces. The association of various 
forms, such as, for example, certain species of Polysiphonia 
with certain species of Fucus, is also a point of some 
interest. I hope ere long to lay before the Biological 
Society some notes on the distribution of Alge on the 
shores of Puffin Island, where these zones may be very 
readily studied. 
Altogether 230 species of marine Algz have been noted 
as occurring in the L.M.B.C. district, of which 59 belong 
to the Pheophycee, 115 to the Rhodophyceex, 42 to the 
Chlorophycee, and 14 to the Cyanophycex. Of these 219 
are recorded by Marrat in his published papers or are 
included in his private list. Of the 28 species noted by 
9—2 
