318 
Batters . — On some New 
easily recognisable even to the naked eye by their pale 
colour. The genus may be described thus. 
Calloeolax, Schmitz in Holmes Alg. Brit. rar. exsicc. vii. 
Minute parasitic Floridean growing on the fronds of Callo - 
phyllis , connexion between host and parasite very intimate, 
the cells of the one more or less blending with those of the 
other. Fructification as in Callophyllis . 
Calloeolax neglectus , Schmitz 1 . c. 
Fronds minute, solitary or gregarious, parasitic on Callo- 
phyllis laciniata situated either on the edge or the surface of 
its fronds and frequently prominent on both sides of it, bilobed, 
palmate or irregular in shape, 2-4 mm. in height ; and about 
the same in breadth ; tetraspores cruciate 18-20 \l in diameter ; 
cystocarps like those of Callophyllis , large, occupying almost 
the entire frond which then assumes a nearly globular shape ; 
Antheridia unknown. 
Berwick, 1831, Dr. Johnston; 1884, &c., E. A. B. ; Arran, 
Miss E. Barton, 1892; Paignton, 1894, and Falmouth, 1893, 
T. H. Buffham ; Weymouth, 1893, E. M. Holmes; Swanage, 
E. A. B. Summer and autumn. 
Hymenoelonium, nov. gen. 
In 1859 the brothers Crouan described 1 , under the name 
Callithamnion serpens , a minute but interesting little Alga 
which they had found on bits of broken glass brought up by 
the dredge in Brest roads. They only obtained two speci- 
mens, and, so far as I am aware, until last winter the plant 
had not been again found. In December, 1894, Mr. E. M. 
Holmes showed me a specimen of an Alga he had received 
from Plymouth, which in many respects differed from any 
known British Alga, and appeared to belong to an entirely 
new genus. Mr. Holmes very kindly gave me a portion of 
his specimen for examination, and requested me, if the plant 
were new, to describe it. I had intended to name the species 
after Mr. Holmes, but a careful examination of the description 
1 Ann. Sc. Nat. 4th Ser. Vol. xii, p. 296, PI. 22, Fig. I. 41-43 
