350 
Mr. H. J. Carter’s Contributions 
canals. Spicules of three forms (viz. one skeleton- and two 
flesh-spicules) :—1, skeleton-, large, acerate, curved, smooth, 
sharp-pointed gradually, 1-19th by 1-900th inch in its greatest 
dimensions (PI. XXVIII. fig. 16); 2, flesh-spicule, stellate, 
very variable in form, from the variable number and irregular 
position of the rays, from two to twelve, arising from a slight 
central inflation—very variable also in size, from 1-1200th to 
l-428th of an inch in diameter (fig. 17, «, b ), rays micro- 
spined (fig. 17, c); 3, flesh-spicule very minute, sceptreliiform, 
consisting of a straight shaft, spined at intervals, viz. at the 
ends and at two points on the shaft, all equidistant, but very 
variable in this respect, 1-1500th inch long (fig. 18 a). 
Skeleton-spicules, with a few flesh-spicules, generally distri¬ 
buted throughout the mass; the latter most abundant on the 
surface. Size of specimen 24 inches long and 1 inch high. 
Hob. Marine, on hard objects. 
Loc. Freeman tie, Australia. 
Obs. Examined in the dried state. This specimen, now in 
the British Museum (numbered 691), came from the late Dr. 
Bowerbank’s collection, and is labelled u Thomas Ingall,” in 
addition to the locality. I also possess a mounted fragment, 
taken from a specimen from Hayti belonging to the Liverpool 
Free Museum, which was sent to me by Mr. Thomas II. 
Higgin for examination. In spiculation S. simplex is so 
much like Stellettinopsis corticata that I have placed it in the 
same genus, assuming that the sceptreliiform flesh-spicule 
is but another form of the entirely spined bacillar one of the 
latter ; the large size of the acerate, however, renders it still 
more like that of the acerate body-spicule of titelletta. 
In the Haytian specimen (which is attached to the base of 
one of Luffaria jistuloris) the spiculation, generally, is a little 
larger, the spination of the sceptrella more irregular than that 
of the Australian one, and the rays of the stellate slightly 
inflated elliptically at their free ends. 
Samus anonyma , Gray. (PI. XXIX. figs. 1-4.) 
Minute amorphous masses of dry contracted sarcode, fur¬ 
nished with filiform extensions, and charged with spicules of 
the species, in cavities formed by an excavating Cliona. 
Colour now like that of dried sarcode, i. e. yellowish. Tex¬ 
ture also that of dried sarcode, viz. gum-like. Pores, vents, 
and internal stincture not visible, from the dried state and 
minuteness of the specimens. Spicules of three forms, viz.:'— 
1, very large, consisting of a short, stout, smooth, subtrian- 
gular shaft, terminated at each end by a similar development, 
