NATURAL HISTORY. 
Nostoc.) This is frequent in pastures after 
rain. 
2. N. VeErrucosum. This is frequent in the 
streams descending from Dartmoor, 
CODIUM. 
A spongiform, forked, spherical, or fiat mass con« 
taining tubular fitaiments—fructification granular in 
the tubes, 
1. C. Bursa. E. Bot. t. 2183. (Fucus Bur- 
sa.) Torquay. 
2. C. Tomentosum. E. Bot. t. 717. (Fucus.) 
On the coast occasionally. 
CHATOPHORA. 
A gelatinous roundish or elongated mass, filled 
with branched articulated filaments. 
1, C. Marina. E. Bot. t. 1956. (Rivuta- 
RIA TUBERIFORMIS.) Attached to rocks or 
marine plants. 
2. C. Ruspra. E. Bot. t. 1627. (Uiva Ru- 
BRA.) Ditto. 
LINKIA. 
Gelatinous, and roundish or elongated, composed of 
straght, radiating, simple filamenis, 
1, L. Atra. E, Bot.t.1798. (Rivutaria 
