86 
CLASS I. — ORDER II. 
lated, and trichotomous ; cells in threes, cylindrical, 
with a very small opening ; ovaria oval, and axillary. 
BLACK. 
23. Sertularia nigra. Cells nearly opposite, 
and very small ; ovaria very large, oval and quadran- 
gular ; branches pinnated and black. 
Indian and American seas ; and coast of Cornwall. 
CEDAR. 
24. Sertularia cedrina. Cells nearly cylindri- 
cal, tubular, and imbricated, in four rows ; branches 
quadrangular, and largest at the summit. 
Sea of Kamtschatka. 
PURPLE. 
25. Sertularia purpurea . Branches quadrilate- 
ral and dichotomous ; cells nearly oval, tubular, and 
imbricated, in nearly four rows ; ovaria upright and 
campanulated. 
Sea of Kamtschatka. 
OBSOLETE. 
26. Sertularia obsoleta. Cells oval, nearly 
heart-shaped, placed five and five in eight rows; 
branches alternate. 
Frozen sea. 
WILD PINE. 
27. Sertularia pinaster . Cells in six rows; ova- 
ria much swelled ; branches alternate and pinnated. 
Frozen Ocean. 
DODDER. 
28. Sertularia cuscuta . Cells in groups round 
