24 
ig. 26 
ey, 
ig. 28 
Fig. 
20). 
. 30 
5 Bu 
so 
N 
5 ui 
Ww 
~ 
PLATE Tt 
. Cryptohelia pachypoma ~ 2. A branch, probably the greater part of a colony. All the lids that 
are present are distended with male ampullae. Two cyclosystems are joined together by their 
lids (j.). 
Cryptohelia pachypoma 21. Showing the very large lids bearing male ampullae, usually from 1 to 
5 in each lid. Owing to their size the lids are frequently detached, and their contents scattered. 
Nematophores (nem.) are on the ampullae and stem. 
. Cryptohelia platypoma sp. n. * 2. Part of a colony. 
. Cryptohelia platypoma. 21. Showing the great breadth of the lid (l.i. and 1.3) and the small 
number of septa. At 1.2 the lid has been broken off. 
. Cryptohelia balia sp. n. * 2. Slightly reconstructed. Probably the greater part of a colony. 
Showing incrusting laminae (lam.). 
. Cryptohelia balia. « 17. Two cyclosystems showing the substantial, triangular lid, one cyclosystem 
with the ampulla broken open (amp. 1) as it was found, the other with it intact (amp. 2). The 
ampullae are probably female. The nematophores (nem.) are very large. 
. Cryptohelia stenopoma sp. n. ~ 2'/,. Part of a young colony. 
. Cryptohelia stenopoma. « 21. A branch from the colony shown in Fig. 30, showing the small 
delicate lids. One cyclosystem with a young (probably 9) ampulla. 
. Cryptohelia stenopoma. * 20. Dried specimen calcined. Cyclosystem with ampullae, showing also 
the exsert septa. 
Conopora major. ~ 2. Whole colony, with symbiotic polychaet (pol.). Pore (ho.) leading into the 
hollow interior of the very thick main stem. The growth is irregular and not flabellate. 
Conopora major. ~ 18. Showing two stages in the formation of the circular male ampulla (amp. 1 
and amp. 2). At amp. 1 it is a slight swelling, at amp. 2 it encircles the cyclosystem like a 
girdle. Each swelling contains several cavities in which the gonads are developed. The surface 
in fresh specimens appears smooth. 
. Conopora major. x 22. One cyclosystem calcined and cut longditudinally so as to show an 
ampulla cavity. These cavities have each a permanent aperture (ap. amp.) upon a septum. 
The pores called lower dactylopores (I. dac. p.) indicate the position of the connection between 
the dactylozooids and the gastrozooid, as described by MOSELEY, nem. = nematophore, often 
present on the septa. 
. Steganopora spinosa. ~ 2. Terminal part of a branch, the only specimen. It is thinner at the base 
owing to the absence of ampullae. 
. Steganopora spinosa. ~ 19. Showing tubular dactylozooid projections, which are often broken 
short, gastropores and ampullae. 
. Steganopora spinosa ~ 20. Longitudinal section through the basal part of the calcined stem where 
there are no ampullae. Showing the great length of dactylopores and the intercommunications 
between them (con. 1) and with the gastropores (con. 2). 
