122 Mr. H. J. Carter on new Sponges. 
Museum. Dermal layer even, but not glassy, varnish-like. 
Colour throughout soot-black. Spicule of one kind only, 
like the foregoing. 
Loc. Freemantle, S.W. Australia. 
5. Phleodictyon isodictyiforme, Crtr., n. sp. 
Massive, sessile, incrusting, spreading, irregular in form ; 
more or less composed of erect cylindrical appendages rising 
from a subbasal lamina. Consistence fragile. Colour fawn. 
Surface even; appendages hollow, tubular, closed at the free 
end, which is often expanded and bifurcate ; walls composed of 
two layers, viz. an external and an internal one,—the former 
isodictyal and homogeneous in appearance, densely spiculous ; 
and the latter spiculo-fibrous, consisting of a coarse, open © 
reticulation, whose longitudinal lines are most pronounced, 
projecting in relief from the imner surface. Tubular ap- 
pendage rougher over its free extremity than elsewhere, but 
presenting no defined osculum there, nor on any other part of 
the sponge that I can see. Pores probably in the soft dermal 
layer. Body of the sponge almost obsolete, consisting of that 
small portion of the lamina which exists between the erect 
appendages, with which it is confounded both in structure 
and continuation. Spicule of one kind only, viz. acerate, 
curved, fusiform, sharp-pomted at each end, smooth, 30 by 
4-6000th inch in its greatest dimensions. Size of specimen 
about 2 inches square ; tubular appendages about 9-12ths inch 
high and 2-12ths inch in diameter. 
Hab. Marine. Growing over shell-detritus at the sea- 
bottom, old mussel-shells &c., amidst Polyzoa, especially Crista 
eburnea. 
Loc. Vigo Bay ; west coast of Spain. 
Obs. This sponge is in the Kent collection at the British 
Museum, No. 15, registered 72. 5. 4. 1, dredged on board the 
‘Norna’ in 1870. At first sight it looks very much lke an 
Isodictya, but, on dissection, is found to be similar in structure 
to Desmacidon Jeffreysti—which distinguishes it from an 
appendiculate Polymastia, to which it also bears some resem- 
blance externally. . 
6. Phleodictyon hondurasensis, Crtr., n. sp. 
This name is proposed for a tubular fragment, about 24 
inches long, which consists of the bifurcation of one 5-8ths of 
an inch in diameter, of which the wall is composed of two 
lamine, as in the foregoing species, viz. an outer or homo- 
geneous isodictyal tissue of spicules, and an inner one of 
coarse reticulated spiculo-fibre. ‘The latter, however, although 
