L. Batrachospermum sp., trichogyne with spermatia attached; carpospores arising from fertilized carpogonium.

F. Macrocystis sp., tubular elements from the medulla, with sieve-like transverse walls.

Chara sp., oogonium and antheridium at a node on a lateral appendage.

Oedogonium sp., oogonium at moment of fertilization with dwarf male attached.

Curious facts are given on the movements of Cassia, Phyllanthus, sp., Desmodium sp.

L. Caulerpa sp., showing portion of axis with leaf-like and root- like appendages.

C. Lomeittaria sp., apex showing growth in length through coordinated growth of many filaments.

G. Collithamnson sp., tetrasporangium with spores arranged in a tetrad.

A. Polysiphonia sp., apical region showing leading cell and cutting off of pericentral cell.

Volvox sp., surface view of a single cell showing connexions.

F. Polyzonia sp., branch with leaf-like branches of limited growth.

The complete nucleotide sequence of a virus infecting ornamental hibiscus (Hibiscus sp.)

G. Laminaria sp., hyphae with trumpet-like ends also from medulla.

B. Polysiphonia sp., transverse section through a branch, and at a, mother-cell of tetraspores.

H. Oedogonium sp., intercalated growth by insertion of new piece (a) leaving caps.

Chara sp., axis with leaf-like appendages and a branch.