ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
553 
Algee. 
Absorption of Light by Marine Algae.* — Prof. N. Willo has 
previously noticed the occurrence of chromatophores deeply imbedded 
in the tissue of brown and red algae, and has now made a number of 
observations as to the penetration and absorption of light. He gives 
a table showing his results, and suggests that the deep chromatophores 
represent a secondary internal assimilating system utilising the C0 2 of 
respiration. 
New Genera of Algae. f — Mr. E. A. L. Batters describes three new 
genera of marine algae from the south coast of England. 
Hymenoclodium (Florideae). Fronds minute, adhering by the entire 
under surface ; branches opposite, frequently anastomosing, united by a 
hyaline membrane into a pseudo-parenchymatous expansion ; tetraspores 
cruciate, formed from the cells of the main stem. Founded on Calli- 
thamnion serpens Crn. 
Bujfhamia. Fronds simple, cylindrical, solid, composed of an inner 
layer of large angular roundish colourless cells, and a cortical layer 
of closely packed small coloured cells, from which at maturity arise 
short jointed assimilating filaments or joaraphyses, plurilocular sporanges, 
and colourless hairs ; sporanges linear-oblong, with obtuse or slightly 
pointed apices, stalked ; unilocular sporanges unknown. Epiphytic on 
Castagnea Griffithsiana. 
For this genus the author proposes to establish a new family of 
Phseosporeae, Buffhamiace^:, nearly resembling the Chordariacese in its 
mature state, but showing, in its earlier stages, a closer relationship 
with the Asperococcacese, or, through Myriotrichia densa , with the 
Myriotrichacere. 
Tellamia (Chlorophycese). Thallus minute, yellowish or brownish 
green or clear grass-green, composed of radiating branched jointed 
threads, with tun-shaped or oval cells, constricted at the joints. Fila- 
ments at first rolled up into an almost spherical ball, spreading out after- 
wards and branching in all directions ; propagation by zoospores formed 
in slightly enlarged cells. Two species growing on the periostracum 
of the yellow periwinkle, Littorina obtusata. 
Cystocarp of Ehodomelacese.f — Mr. R. W. Phillips describes the 
structure and development of the cystocarp in several species of Bliodo- 
mela and Polysiphonia. In all the species examined the fifth and last- 
formed pericentral cell of the procarp gives rise to three branches : — 
(a) a 4-celled lateral carpogonial branch ; ( b ) a 2-celled lateral sterile 
branch ; (c) a 1-celled inferior sterile branch. After fertilisation, there 
is great uniformity in the processes up to the formation of the carpo- 
spores. The carpogonial branch is first thrown off ; the 2-celled lateral 
sterile branch again branches and becomes 4-celled ; a cell is added to 
the 1-celled inferior branch ; the fifth pericentral cell, now the auxiliary 
cell, shuts off a superior sporogenous cell ; and the central cell finally 
gives off laterally 2 cells, from which about 12 paranematal filaments 
are derived, converging to the pore, and forming an imperfect lining. 
* Biol. Centralbl., xv. (1895) pp. 529-36. 
t Ann. Bot., ix. (1895) pp. 168-9, 307-21 (1 pi.). 
X Tom. cit., pp. 290-305 (1 pi.). 
