118 Mr. H. J. Carter on the Genus Rossella. 
sponge growing upon little bundles of anchoring-spicules pro- 
jecting from the surface, it seems probable, if these do not 
originate in ova which have respectively fixed themselves 
there for development, that they arise from pullulation or 
budding. 
In my description of f. antarctica the spicules are numbered 
1 to 10 inclusively, to avoid unnecessary repetition in the fol- 
lowing species, which will also be described generally with 
reference to what has already been stated. 
Lastly, by comparing my representation of LR. antarctica 
(Pl. X. fig. 4), and its previously delineated spicules (/. ¢.), 
with Schmidt’s representations of his “‘/oltenta Pourtalesii”’ 
(‘Atlantisch. Spongienfaun.’ Taf. i. figs. 1-6), the probability 
ef the latter being a species of Rossella, as I have heretofore 
stated, will appear still greater. 
Rossella philippensis, Gray. Pl. X. fig. 1. 
General form globular (fig. 2), ovate, or cup-shaped (fig. 1), 
thus perhaps varying in accordance with the age, development, 
and wearing of the specimen ; presenting a flattened summit 
in which there is an aperture (fig. 1,d@), and a conical base 
which is closed, but rendered irregular by mammiform pro- 
longations of the body, out of each of which issues.a hair- 
like lock of long anchoring-spicules (fig. 1, eee c) ; mammi- 
form prolongations &e. increasing in size with age, dispersed 
over the body generally, but largest and most prominent at 
the lower part. Aperture circular and contracted in the young 
or globular forms (fig. 2, 6), elliptical elongate in the ovate, 
and patulous in the old, worn or cup-like form (fig. 1, d) ; 
leading into a cavity of much the same shape as that of the 
sponge externally. Sessile or fixed by the anchoring-spicules. 
Colour grey. External surface uniformly even, except where 
interrupted by the mammiform prolongations of the body ; 
eribellate immediately below the latticework layer, surmounted 
by one form of spicule only, which issues, as before stated, in 
hair-like locks from the summits of the prolongations, and 
will be more particularly described hereafter. Internal surface, - 
or that of the cavity, uniformly smooth, interrupted by de- 
pressions or pits (fig. 1,¢ e), so increasing m size downwards 
as to occupy the whole of the lower part. Body or wall the 
same as in the foregoing species. External or dermal surface 
covered by the same kind of latticework. Pores and vents 
the same respectively. Spicules of three kinds, viz. appen- 
dicular, structural, and flesh-spicules. A. Appendicular, of 
me form only, viz. the ‘‘ anchoring ” one, no. 2 in the fore- 
