2 )1 
Notes on Batrachospermum. 
growth form of the thalli were also very frequent, a series of 
merging types being found. They varied in colour from a pale 
green in the typical B. moniliforme to a dark olive green in some 
types, especially in that which somewhat resembles Sirodot’s figure 
of B. Corbula —see Pig. 6, and compare Sirodot, Plate V, fig. 1. 
FIGS. 1-10. BATRACHOSPERMUM. 
Figs. 1-3, camera lucida drawings of three hypertrophied trichogynes 
illustrating the varied and peculiar forms, spermatia were actually present as 
figured. Fig. 4, a normal trichogyne of B. moniliforme , figured on the same 
scale. Figs. 5-7, three types of growth form drawn with slight magnification. 
Fig. 5, typical B. moniliforme. Fig. 6, a type appearing externally somewhat 
like B. Corbula, Sirdt. Fig. 7 has a large central axis and discoid verticels. 
Fig. 8, central axis showing the inflated cells nearly destitute of a cortical 
covering, the cells are enlarged towards the basal end. Fig. 9, the slight 
development of the cortical filaments as in Fig. 8, shown in detail. Fig. 10, 
a central row of a branch of verticel, which bears a cystocarp at the apex, the 
form of the cells is like that of the corresponding rows in B. Corbula, Sirdt. 
