This genus, as modified by Francé, is distinguished from the preceding by the possession of an unbranched stalk much longer than the body length. The body is naked and of various shapes, and the individuals are solitary or colonial upon a single stalk. Kent '81 enumerates no less than 10 species, which were cut down by Bütschli to 1. Francé admits 4—C. botrytis Jas. Clark; C. grossularia; C. pyriformis, and C. furcata, all S. Kent—but regards the second and third as merely form varieties of the first.

Fig. 12.—
Codonosiga botrytis.
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Codonosiga botrytis (Ehr. sp.) Jas. Clark '67. Fig. 12.

Francé gives the following synonyms: Epistylia botrytis Ehr.; E. digitalis Stein, Zoothamnium parasitica Stein; Anthophysa solitaria Fresenius; Codonosiga pulcherrima Jas. Clark; Monosiga gracilis S. Kent; M. globulosa S. Kent; Codonosiga pyriformis Kent; C. grossularia Kent; (Francé).

The individuals are small and provided with a long unbranched, or terminal, simply split stalk. The individuals are single or colonial. The Woods Hole form measured 22µ over all; the body was 5µ, the collar 3µ, and the stalk 14µ. No colonies were seen, and only a few individuals upon red algæ.

Genus BODO (Ehr.) Stein.

(Stein '59, Bütschli '83; Klebs '92; Senn 1900.)

The body is naked, usually amœboid in its changes, and provided with two flagella, one of which is usually trailed along under and behind the animal. The anterior end is usually pointed, with the flagella arising from a minute depression; the posterior end is rounded. Specific characters very difficult to analyze. Fresh and salt water.