142 SIDNEY F. HARMER. 
The embryophore is younger than in fig. 11. Parts of the zocwcia which are 
seen either through other zocecia or through the roof of the ovicell are indi- 
cated by dotted lines. The colony is left-handed. z* is occluded (and was 
obviously fertile), and would hardly have been visible at all in a dry 
preparation. 
Fic. 13.—Occlusion of the fertile zocecium ina left-handed colony (diameter 
‘88 mm.). The roofing of the ovicell has only just commenced, as a calcareous 
film starting from the outer border of z?, and sweeping inwards in such a way 
as to leave z? open to the cavity of the ovicell. Although the figure is from a 
dry mount, the remains of the fertile brown body (not shown in the figure) 
are visible through the opening into z?. 
Fic. 14.—Part of the growing edge of an adult colony, more highly magni- 
fied, showing the way in which new zoccia are formed, and representing 
various stages in the development of the alveoli. See also pp. 81, 84. 
(Figs. 15—35, and Fig. 37, refer to the development of the first brood 
of secondary embryos. 
PLATE 9. 
Fie. 15.—A polypide-bud with an egg. One other bud in the same colony 
had an egg in a similar position. 
Fic. 16.—From a colony, ‘48 mm. long, consisting of three zoecia. One 
or two egg-cells were discovered in z}, as well as in the zocecium (z*) drawn. 
Fie. 17.—Horizontal section of a colony, ‘43 mm. long and ‘25 mm. broad, 
consisting of three complete zoccia only. 
Fic. 18.—Part of the left-hand zocecium (? z°) of the last figure, more 
highly magnified. The egg measures 12°8 » (= ‘0128 mm.). 
Fie. 19.—From a colony consisting of three mature zocecia. Development 
of the egg has commenced, and the follicle is becoming definite. The heads 
of mature spermatozoa are seen in the body-cavity. 
Fie. 20.—From a colony consisting of three mature zocecia. The follicle 
is more developed, and the suspensor has become a definite structure. 
(Diameter of the embryo, 11:2 p.) 
Fic. 21.—From a colony, ‘40 mm. long and ‘21 mm. broad, consisting of 
three mature zocecia. ‘The follicle is cut transversely, and the embryo is in 
about the same stage as that of Fig. 19. 
Fic. 22.—From a colony consisting of four mature and one half-grown 
zocecium. ‘The suspensor is not yet clearly formed. 
Fic. 23.—From a colony, ‘53 mm. long and ‘32 mm. broad, consisting of 
five mature zocecia. The figure is combined from three sections of the 
ocecium, the fertile brown body being projected on to the rest of the drawing. 
