Mr. H. J. Carter on new Sponges. 107 
mal sarcode colourless. Surface uniformly plane on both 
sides, interrupted only by the pedunculated attachment ; 
minutely reticulated in relief from the subsidence of the der- 
mal sarcode upon the subjacent fibrous structure, which ter- 
minates in little tags, each of which bears a sand-thread. 
Vents numerous, small, circular, each provided with an annu- 
lar diaphragm of the dermal sarcode; disposed singly or in 
scattered groups on one side, more plentiful and more or less 
in juxtaposition on the other; when single and isolated, pre- 
senting a stelliform arrangement of the superficial branches 
of the excretory canal-system, but when on the margin 
running in straight lines towards the latter. Pores in the 
interstices of a soft fibrous reticulation zz the dermal sarcode 
which tympanizes the interstices of the subdermal fibrous 
reticulation. Internal structure composed of fine keratine 
fibre, densely reticulated, whose interstices are tympanized by 
the internal sarcode, here and there presenting a sand-thread, 
which terminates in the “tags” on the surface; traversed 
plentifully by the branches of the excretory canal-systems 
that finally end in the vents. Size of specimen about 8 by 
5 inches in its longest diameter, and 2 inch thick, 
Hab. Marine. 
Loc. South Australia, “ off Darien Island;” Woolongong 
and Port Fairy. 
Obs. This sponge, from .its composition and structure, is 
evidently a very compact form of the officinal kind, too com- 
pact, indeed, if not thin, to be of any use for domestic pur- 
poses. Although I am at present in possession of several 
specimens, my description is chiefly taken from one belonging 
to the British Museum, which has been preserved in spirit and 
bears a label with “J. B. Jukes. Off Darien Island” on it, 
together with “J. 121.” in the corner; from which I infer 
that it was obtained at least from the south coast of Australia, 
as two of the other but dried specimens bear labels respec- 
tively on-which ‘ Woolongong” and “ Port Fairy” are 
written. In the absence of any register-number, I make this 
inference because a great number of both wet and dry speci- 
mens of sponges from these localities in the British Museum 
bear the well-known name of the late Mr. J. B. Jukes; and I 
cannot find out where “ Darien Island ”’ is or if there be such 
a place. My running-number on the label is 619. 
I have already alluded to the world-wide occurrence of the 
group Euspongiosa under different forms (‘ Annals,’ 1882, 
vol. ix. p. 273), which has been made the first in my order 
Psammonemata because it contains the least quantity of sand- 
thread (fibre axiated with foreign bodies), while the second, viz. 
