114 Mr. H. J. Carter on the Genus Rossella. 
the bottom of the Antarctic Ocean by Sir J. Ross, in 300 
and 206 fathoms and in 744° and 774° south latitude respec- 
tively, which, with other deep-sea specimens obtained at the 
same time, had been handed over to the British Museum by 
the Admiralty. 
For the sponge from which these spicules were supposed to 
have been derived I proposed the generic name of ‘“/ossella,” 
and for the species “2. antarctica”’ (‘ Annals,’ 1872, vol. ix. 
p- 414, pl. xxi.). One form of the spicules was regarded as 
podal or anchoring, and the other as belonging more directly 
to the body of the sponge. 
In the same year another specimen of this genus was ob- 
tained by the British Museum from Cebu, one of the Phihp- 
pine Islands, through Dr. A. B. Meyer (‘Annals,’ 1872, vol. x. 
p- 113), and named by Dr. Gray “Rossella philippensis” 
(cb. p. 187). 
In March 1873 four more specimens of the same sponge 
were obtained by the British Museum from the same neigh- 
bourhood, again through Dr. Meyer; and from their having 
a different aspect, Dr. Gray proposed for these the name of 
“Psetalia globulosa,” stating that they would be described by 
myself more particularly thereafter (‘Annals,’ 1873, vol. x1. 
. 234). 
a Subsequently (that is, in the month of June following) I 
received from Prof. Wyville Thomson the specimen of RL. 
velata from which his figure in ‘The Depths of the Sea’ 
(p. 418) was taken. 
And in the month of March 1874 a glass jar was discovered 
in the British Museum, containing two small specimens of the 
veritable Rossella antarctica, dredged up by Sir J. Ross in 
300 fathoms, 744° south latitude, no doubt at the same time 
that the fragments of the Tethya antarctica and the spicules 
above mentioned were obtained. 
Thus provided, I have been able to compare all these spe- 
cimens, and find that they all belong to one genus, viz. Hos- 
sella, but that the Antarctic, Philippine, and Atlantic deep- 
sea ones possess peculiarities entitling them to be consi- 
dered three different species. These peculiarities will appear 
in the following descriptions respectively, beginning with 
that of 
Rossella antarctica, Carter. Pl. X. fig. 4. 
General form sac-like, compressed (? nat.), with the upper end 
truncated and open, and the lower one conical and closed 
(fig. 4, a). Aperture elliptical, more or less elongate, corre- 
