50 
Bristol. — On the Alga- FI or a of some Desiccated 
several important particulars and is evidently a new species probably grow- 
ing only in soils. 
Among the blue-green algae, the occurrence of Plectonema Battersii in 
Text-fig. S. Germination of spores of some Myxophyceae. a. Nodutaria Harvey ana , 
(Thwaites) Thuret; a.-c. from old stored soil, 1846; d. and e. from recent soil. b. Anabaena 
oscillarioides , Bory, forma. C. Anabaena sphaerica , Born, et Flah. ; a.-c., successive stages in ger- 
mination. d. Cylindrospermum licheniforme, (Bory) Kuetz. E. Nostoc sphaeroides, Kuetz. 
F. Nostoc muscontm , Kuetz.; a.-d., successive stages in germination. All figs, x 825. 
thirteen of the soil-samples is interesting, since it has previously been 
described only as a marine aquatic species. 
Owing to the conditions under which the experiments have been 
carried out, a number of observations have been made of new or interesting 
