345 
to our Knowledge of the Spongida. 
spined rays parting from the centre directly (that is, without 
inflation there), 1-1500th inch in diameter (flg. 10, h). Skele¬ 
ton- and flesh-spicules scattered throughout the sponge gene¬ 
rally, the latter rather sparsely. Size of largest specimen 
about 2 x 1| x f inch. 
Hah. Marine, growing in the Laminarian zone. 
Loc. South Australia. 
Ohs. Examined in the dried state. There are. two speci¬ 
mens of this sponge now in the British Museum, almost ex¬ 
actly alike in every particular, viz. one labelled u 69. 1. 22. 25, 
Van Diemen’s Land,” and the other from the late Dr. Bower- 
bank’s collection without label, except that of u South Aus¬ 
tralia,” on the box in which it was contained, both now 
bearing my no. 315 E, h, 19. But for the presence of the 
little, delicate, stellate flesh-spicule, there would be no distin¬ 
guishing Amorphina stellifera from the worldwide Ilalichon- 
dria panicea , Johnst., perhaps the commonest sponge on the 
coasts of Great Britain. It is remarkable, too, that the pink 
colour should be owing to the presence of the little parasitic 
cell mentioned, apparently identical with that of Palmella 
spongiarum , Cart. (Ann. 1878, vol. ii. p. 165), which I found 
to be the origin of a similar colour in a specimen of llali- 
chondria panicea picked up on this beach (Budleigh-Saltertori). 
Besides the pink cell in Amorphina stellifera , both speci¬ 
mens are charged with one which I think it advisable to note 
for future reference, as I do not know what it is. This cell, 
which is much larger than that of the Palmella , is colourless 
and ovoid, measuring 1-875th inch in its greatest diameter, 
containing a transparent nucleus 1-2000th inch in diameter, 
and surrounded by a number of still smaller cells, each of 
which is 1-6000th inch in diameter, the transparent spherical 
nucleus in the centre contrasting with the translucent ones 
that surround it. 
As these specimens of Amorphina stellifera have grown 
from an embryo attached to the seaweed, the branches of the 
latter have become enveloped by them respectively during 
growth, like bits of grass &c. in a Fungus, and thus they 
have become suspended. 
Suherites spinispirulifer, n. sp. 
(PI. XXVIII. figs. 6, 7.) 
Specimens solid, elliptical, probably having obtained this 
form by forced separation from the place of growth and subse¬ 
quent rolling about on the beach in the midst of the waves. 
Colour now chiefly yellowish white, with patches of purple on 
the surface, indicating that this, if not the whole of the sponge, 
