PLATE VIII. 
Fig. 34.—M. pribilofi. Portion of a branch enlarged showing number 
and length of jointed spines (sp.), size of lateral avicularia (lat. av.), 
frontal avicularia (fr. av.), and root chambers in the two positions (7. ch. 
and: 7 1ds) in e< 80: 
Fig. 35.—Scrupocellaria californica Trask. Dorsal view of part of two 
zoecia to show vibracular chamber (v. ch.), short vibraculum (v.), groove 
of vibraculum (gr.), and lateral avicularium below (av.). x 50. 
Fig. 36.—S. californica. Portion of a branch enlarged showing varia- 
tion in size of lateral avicularia (lat. av.), the vibracular cell (v. ¢.), on 
zowcium at bifurcation (zoe. bi.), visible from the front, while on other 
zocecia only the short vibraculum (v.) is seen from the front, and only on 
the lower zoccia which possess root fibres (r.). X 50. 
Fig. 36a.—S. californica. Habit sketch. 
Fig. 37.—S. californica. Three zoccia with owcia (0e.). X 50. 
Fig. 38.—Scrupocellaria varians Hincks. Portion of a branch enlarged 
to show bifid and trifid scutum (sc.), lateral avicularia varying in size from 
very small (s. av.) to the large curved variety (c. av.) ; also the vibracular 
cell visible from the front (v. ch.), and the long vibraculum (v.) present on 
each zoecium. X 20. 
Fig. 39.—S. varians. Dorsal view of a portion of two zoecia to show 
position of vibracular chamber (v. ch.) with its long vibraculum (v.) and 
its groove (gr.), with the root disk (7. d.) and root fibre (7. f.) on its 
basal margin; also lateral avicularium with its much elongated curved beak 
(c. av.). X 20. 
Fig. 40.—Caberea ellisi Fleming. Habit sketch. 
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