Mr. H. J. Carter on the Genus Rossella. 119 
going description, but much larger and longer, increasing’ in 
size towards the lower part, where they are 6 inches in length. 
B. Structural, the same as in the foregoing species, but with 
no spines on the shaft or arms of the crucially headed one. 
c. Flesh-spicules of eight forms (see ‘Annals,’ 1873, vol. xii. 
pl. xili.), viz. figs. 1, 2, 3, 4, 5, 6, 8, and 12 inclusively, only 
that figs. 2, 3, and 4 in R. philippensis are subspinous in all 
their parts. Size of the largest specimen, which is cup-shaped 
(fig. 1), 2 inches high, and 2,5; inches by 1; inch wide at the 
orifice ; cup 1 inch deep, with thick rounded margin. Longest 
hair-like locks of anchoring-spicules 6 inches. Size of ovo- 
globular specimen 14 by 14 inch in its greatest diameters. 
Size of the three other specimens, which are younger, globular, 
and linked together by the hair-like locks of the largest (as 
in figs. 1 & 2, f), different, probably in accordance with their 
ages respectively. 
Hab. Marine. 
Loc. Cebu, Philippine Islands. 
Obs. 'The hexactinellid character of the spicules of this 
sponge, coupled with its four-hooked anchoring-spicule (no. 2) 
as described in the last species, at once proves it to be a Ros- 
sella; and the absence of the crucially headed veil-spicule 
from the surface of the body generally (that is, the absence of 
the “veil ”), whose presence is so characteristic of R. antarctica 
and . velata, further proves it to be the 2. philippensis of 
Dr. Gray. ‘To this we might add the much greater develop- 
ment in size and length of the groups of anchoring-spicules, 
the absence of spines on the arms of the large crucially headed 
structural spicules of the body, and the absence, for the most 
part, of the outer and inner arm of the latticework sexradiate 
spicule of the surface, thus leaving the four hortzontal ones 
alone developed ; while the absence of the erect fringe of spi- 
cules around the aperture, whose presence is so characteristic 
of R. antarctica, further distinguishes it from that species. 
It is not improbable that the “cup-like form ” above de- 
scribed and figured (Pl. X. fig. 1) has had its cavity and 
shape worn down, and has become modified generally into 
its present condition from a younger and more globular form 
with contracted aperture, somewhat like fig. 2; while, so far 
as these changes go, there may be similar differences between 
the older and younger forms also of £. antarctica; but although 
such may be thus anticipated, I am not, from the few speci- 
mens from which I have had to write my descriptions, able to 
make the statement with certainty. 
In studying the Spongida it will be found that the general 
form so often varies, that alone it is not to be depended on as 
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