342. TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
EXPLANATION OF PLATES. 
Prarie 
Fig. 1. A small plant of Codiwm tomentosum. Nat. size. 
Fig. 2. Rhizoidal filaments, in some cases attached to 
and enveloping grains of sand. x 3850. 
Fig. 8. One of the palisade ‘‘ cells ’’—narrow mucronate 
type.. X 300. 
Prank 7 is 
Figs. 4, 8, 9,12. Various forms of vegetative develop- 
ments from the abortive gametangia (?). x 350. 
Fig. 5. A “‘palisade cell’? with one empty, one full ripe, 
and one developing sporangium. The same 
cell bears the scar of a fallen sporangium, or 
possibly, from its position high up on the cell, 
a gametangium. X 350. 
Fig. 6. An adventitious bud after its isolation from the 
| parent ‘‘cell.”” x 350. 
Fig. 7. Gametangium (?) in process of forming a vegeta- 
tive bud. . X 350. 
Figs. 10 and 14. Stages in the development of the plug- 
like septa. X 600. 
Fig. 11. A medullary hypha of a young plant, showing 
mode of origin of the lateral ‘‘ palisade cells.”’ 
x 300. 
Fig. 18. Apices of ‘‘ palisade cells,” (a) C. galeatum, (b) 
C. mucronatum, var. tasmanicum, (ce. d.) C. 
tomentosum, (e.) C. mucronatum. c. da., X 
550; a. b. e., after Agardh. 
