FHloltz : OBSERVATIONS ON PELVETIA. 45 
25. Later stage. Shows cavity deepened, filled with mucilaginous 
remains of cells. 
26. Diagram of the same. 
24%, Young conceptacle. Disintegration of cells has ceased. Their 
mucilaginous remains act asa stopper to the conceptacle. The neck is 
being formed by new layers of subepidermal cells. Paraphyses are 
beginning on the wall. 
28. Later stage. Paraphyses and young oégonia have sprung from 
the cells lining the cavity. Chromatophores abundant near mouth, 
very few or small in lining cells. Cells in lining of cavity rich in 
protoplasm. 
29. Nearly mature conceptacle with paraphyses, o6gonia and an- 
theridial branching hairs. Cells in wall of conceptacle have become 
flattened. 
PrArm Sue 
Anatomical detail. Reproductive organs and paraphyses, x 250. 
30. Beginning of oégone and paraphysis. Odgone cell densely 
granular. Paraphysis begins as a more slender protuberance of cell 
in conceptacular wall. 
31. Later stage. Basal cells have been cut off by odgone and 
paraphysis. 
32. Similar. An odgone anlage preparing to form pedicel cell. 
Paraphyses elongating and dividing. 
33. Nucleus of’ young odgone dividing in two. Protoplasm still in 
communication with that of basal cell. 
34. Later stage, another division of nuclei. The protoplasm of 
the odgone has been forcibly torn away from that of basal cell, prob- 
ably in dehydrating process. 
35. Odgone in four-nucleated stage. 
36. Four-nucleated o6gone showing thickening of wall and separa- 
tion of wall into thin exochite and thick gelatinous mesoendochite. 
The two layers still adhere in places. Wall remains thin at basal 
pit. | 
37. Mature odgone with two eggs. Was mounted in glycerine 
which caused swelling of walls. 
38. Young conceptacle showing origin of paraphases as protuber- 
ances from cells lining cavity of conceptacle. 
39. Young branching hairs, showing mode of branching. 
40. Bottom of nearly mature conceptacle, showing odgone, para- 
physes and branching hairs with antheridia. Antheridial protoplasm 
is shown in different stages of division. 
eat. single branching hair in glycerine. Antheridia with sperms 
and swollen walls. 
