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EXPLANATION OF THE PLATES. 673<br />
Fig. n. Toxochalina rohusta, portion of skeleton, showing primary<br />
and sccoudary fibre, n' . Skeleton acerate and tricurvato<br />
acerate spicules, x 370. From type specimen from Port<br />
Jackson.<br />
0. Pacliychalina macrodactyla. Skeleton-spicule, x 190.<br />
From specimen figured Plate XL, fig. B.<br />
p. ProtoscJimidtici liispidula, portion of vertical section, x<br />
68. . p Skeleton-spicule, x 100. From type specimen<br />
from Albany Island. \_Note.—Some loose spicules in the<br />
interspaces of the skeleton have been omitted for the sake<br />
of clearness.]<br />
q. Bliizochalina spntlmlifera. Skeleton- spicules, X 68. From<br />
type specimen from Thursday Island.<br />
•r. B. canalis. Skeleton-spicule, x 68. From type specimen<br />
from Port Darwin.<br />
s. R. siyigaporensis, var. Spicules, x 190. From specimen<br />
from West Island, Torres Straits.<br />
t. Schmkltia variabilis. Spicules, x 68. From type specimen<br />
from Port Darwin. [The median curve of the diagonally-<br />
placed spicule is represented as too sudden, and the two<br />
lateral curves introduced do not exist.]<br />
u. JReniera testudinaria, part of vertical section, x 38. u.<br />
Spicules, X 68. From dry specimen from Port Denison.<br />
v'. Fellina mnricata. Skeleton-spicule, with ends of two<br />
others, exhibiting the wide range of variation, x 190.<br />
From type specimen from Port Darwin.<br />
w. P. aliformis. Skeleton-spicule, x 68. From type specimen<br />
from Port Darwin.<br />
X. P. eusij^>lionia. Skeleton-spicules, x 68, From type speci-<br />
men from Port Darwin.<br />
y. Amphilectus hispidulus, vertical section, x 68. y'. Skeleton<br />
acuate spicule, x 190. y". Anchorate spicule from front<br />
and side, x 370. From type (dry) specimen from Thurs-<br />
day Island.<br />
2z
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