ilM
Fig. C. Dysidea digitifera. The type specimen, from Albany
Island, 8 fm s .; in sp irit; growing over Hydroid zoophyte.
Nat. size.
D. Cladochalina diffusa. One of the type specimens, from
Singapore, between tide-marks; in spirit. Reduced to
two thirds nat. size. d. Portions of primary and secondary
fibre of vertical section, x 95. d'. Detached
spicule, X 190.
E. Hymeniacidon agminata. The type specimen, from Port
J ackson, 0 -5 fms. ; in spirit. Reduced to two thirds nat.
size.
F. Raspailia clathrata. Basal portion of type specimen, from
Thursday Island, 3 -4 fms. Nat. size.
g. Euspongia officinalis, var. cavernosa. Vertical section of
type (dry) specimen, from Torres Straits. X 38.
h. Psammopemma densum, var. suhfihrosa. Vertical section of
type (spirit) specimen, from Torres Straits, x 38. [The
surface faces to the right.]
i. Cladochalina nuda. Portion of vertical section of type
specimen, from Alert Island, showing the contained spicules.
X 190.
j . C. nuda, var. ahruptispicula. Spicules of type specimen
from Thursday Island. X 190.
h. Chalina monilata, portion of primary fibre of vertical
section of type, from Port Jackson, showing the contained
spicules, X 370. H. An isolated spicule, x 370.
I. Cladochalina suharmigera, portion of primary and secondary
fibres of vertical section, V, spicules, of type specimen,
from Warrior Reef, x 190.
m. Toxochalina folioides, fibre of main skeleton as seen in
vertical section, m'. Skeleton-spicule, x 68. m". Tricurvate
flesh-spicule, X 370. From specimen from Port
Darwin.
11 i
it
Fig. n. Toxochalina rohusta, portion of skeleton, showing primary
and secondary fibre, n'. Skeleton acerate and tricurvate
acerate spicules, x 370. From type specimen from Port
Jackson.
0. Pachychalina macrodactyla. Skeleton-spicule, X 190.
From specimen figured Plate XL. fig. B.
p . Protoschmidtia hispidula, portion of vertical section, x
68. p '. Skeleton-spicule, X 190. From type specimen
from Albany Island. [Note.—Some loose spicules in the
interspaces of the skeleton have been omitted for the sake
of clearness.]
q. Rhizochalina spathulifera. Skeleton-spicules, X 68. From
type specimen from Thursday Island.
r. R . canalis. Skeleton-spicule, x 68. From type specimen
from Port Darwin.
s. R . singaporensis, var. Spicules, x 190. From specimen
from West Island, Torres Straits.
t. Schmidtia variabilis. Spicules, X 68. From type specimen
from Port Darwin. [The median curve of the diagonally-
placed spicule is represented as too sudden, and the two
lateral curves introduced do not exist.]
u. Reniera testudinaria, part of vertical section, x 38. u .
Spicules, X 68. From dry specimen from Port Denison.
V. Pellina muricata. Skeleton-spicule, with ends of two
others, exhibiting the wide range of variation, x 190.
From type specimen from Port Darwin.
w. P. aliformis. Skeleton-spicule, X 68. From type specimen
from Port Darwin.
X. P. eusiphonia. Skeleton-spicules, X 68. From type specimen
from Port Darwin.
y. Amphilectus hispidulus, vertical section, X 68. y '. Skeleton
acuate spicule, X 190. y". Anchorate spicule from front
and side, x 370. From type (dry) specimen from Thursday
Island.
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