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Mr. H. J. Carter’s Contributions 
was once so tinted. Texture loose, open, crumb-of-bread- 
like. Surface without cortex, corrugated. Pores not visible. 
Vents numerous among the corrugations. Internal structure 
consisting of light, loose, areolated, flaky sarcode charged with 
the spicules of the species and traversed by the excretory 
canals. Spicules of two kinds, viz.:—1, skeleton-, stout, 
pin-like, curved, smooth, and sharp-pointed; pin-like head 
chiefly produced by a circular inflation of the shaft just inside 
the blunt end, l-45th by 1-1542nd inch in its greatest dia¬ 
meters (PI. XXVIII. fig. 6) ; 2, flesh-spicule, filiform, con¬ 
sisting of an open spiral coil of one turn and a half thickly 
spined (but not spirally) throughout; coil l-1714th inch long 
by 1-3000th inch broad (fig. 7, a , b). Both mixed together 
in the body of the sponge, the latter most plentiful on the 
outer surface and on the surface of the excretory canals. Size 
of largest specimen about 24 by 2 inches in its longest dia¬ 
meters. 
Hub. Marine. 
Loc. Port Elizabeth, Cape of Good Hope. 
Obs. Examined in the dried state. There are several 
specimens of this sponge in the British Museum, all bearing 
the register no. 71. 5. 12. 1, with my running no. E 13, k , 15. 
A more magnified view of the spinispirulate flesh-spicule has 
been given in fig. 7, b, to show its elementary composition, 
and the specific designation taken from its peculiar spiral 
form, which, together with the presence of the spines, affords 
a combination that I have not met with in any other kind of 
sponge, the spiral flesh-spicule of Trachycladus being smooth 
(that is, without spines). It should be observed that the spines 
are not arranged spirally on the shaft. 
Suberites angulospiculatus , n. sp. 
(PI. XXVIII. fig. 8, a, b.) 
Plano-convex, cake-shaped, elliptical, depressed, spreading, 
sessile. Colour dark brown. Texture fine, compact, cork¬ 
like. Surface uniformly dimpled, irregularly undulating, 
without cortex. Pores and vents not evident. Internal struc¬ 
ture compact, cork-like, consisting of tine areolar sarcode 
charged with the spicules of the species and traversed by 
the excretory canals, which are small; colour internally tawny 
yellow. Spicules of one kind only (no flesh-spicule), viz. 
acerate, undulating, smooth, straight, sharp-pointed, gradually 
angulated in the centre (PI. XXVIII. fig. 8, a), or larger 
and less angulated (fig. 8, b), the former 1-246th by i-12000th, 
and the latter 1 -25th by 1-1200th of an inch in their greatest 
