348 Mr. H. J. Carter’s Contributions 
specimen 4 inches in diameter horizontally; highest lobe 
If inch. 
Hob . Marine. 
Loc. ? Torres Straits. 
Obs. Examined in the dried state. This is a very remark¬ 
able sponge, chiefly on account of its “ soot-black ” colour, 
but not less so in its spiculation. In structure and consistence 
it is almost identical with the type of my group Cavernosa, 
viz. Rhaphyrus Grfffithsii, = to the free form of Cliona celata , 
and thus like Spongia Dysoni , Bk., from Belize (the largest 
sponge on record, of which the specimen is in the British 
Museum). While, however, S. fuliginosus , like Rhaphyrus 
Grijfithsii , has no flesh-spicule, it nevertheless more nearly 
represents Spongia Dysoni (whose form of flesh-spicule is 
given in Plate XXIX. fig. 11) in the nodular surface and 
cribriform grouping of the vents over the nodules, if not in 
the colour also, which appears to have a slight tinge of purple, 
allying it to the lilac tint of the dried specimens of Spongia 
Dysoni. There are two pieces of Suberites fuliginosus in the 
British Museum, bearing the register no. 46. 8. 5. 8, with 
my running no. 379 E, h , 13. They were presented by the 
late J. B. Jukes, Escp, and, both being alike, probably form 
parts of one original mass. 
Stellettinopsis corticata , n. gen. et sp. 
(PI. XXVIII. figs. 10-15.) 
Globular, smooth, corticate, broadly sessile (PI. XXVIII. 
fig. 10). Colour yellowish grey. Texture hard on the sur¬ 
face, soft internally. Surface smooth and even; cortex thin, 
hard when dry, fleshy when wet, about l-48th inch thick, 
presenting a uniformly granular surface composed of minute 
convolutions of the dermal sarcode, like in form to those of the 
brain (but of course microscopic), charged with flesh-spicules 
of the species and grains of quartz sand (fig. 15, c, d, e). 
Pores in the grooves between the convolutions. Vents chiefly 
congregated about the summit of the sponge (fig. 10, a), 
twelve or more in number, of different sizes, the largest 1 -6th 
inch in diameter, each partly closed by a thick, opaque, 
sphinctral diaphragm of sarcode in radiating folds surrounded 
by a raised margin (fig. 15, a, b). Internal structure can¬ 
cellous in the section, subradiating from a more condensed 
centre, increasing in the size of its areolation towards the 
circumference, where it becomes continuous with the cortical 
layer ; composed of areolar sarcode densely charged with the 
spicules of the species, altogether very like the interior of 
Geodia and Stelletta. Spicules of three kinds (viz. one skele- 
