169 
The anal opening is excentric, close to the edge (Fig. 16). In the 
specimen of 6,5 mm h. d. the genital openings have just appeared, 
in that of 8 mm h. d. they have apparently not yet begun to form. 
A darker coloured (green or reddish) spot is found on each genital 
plate on the place of the future genital pore (or just outside it). 
Otherwise the genital and ocular plates are white, the periproctal 
plates green. 
The test is somewhat variegated, white with green or greyish- 
green spots. The tubercles are white or greyish-green. 
The spines are short, only Vs or l U of the h. d., hardly taper¬ 
ing towards the point, which has a small central thorn; at the 
edge of the peristome they are distinctly widened, almost clubshaped, 
slightly curved. They are white, more or less distinctly banded with 
redbrown. The secondary spines (PI. VII. Fig. 20) are conspicuously 
widened at the point, sometimes also widened below the point as 
in Ps. Hnttoni. 
The peristomial membrane, as well as the tubefeet, contain 
some bihamate spicules, the gilis are richly provided with delicate, 
fenestrated plates and more or less irregular spicules. 
The pedicellariæ (PI. VII, Figs. 19, 21—23) in the main as 
those of albocinctus ; no samples of globiferous pedicellariæ with a 
lateral tooth on each side of the blade were observed, nor have I 
found the large form of ophicephalous pedicellariæ. 
The species was found at Three Kings Isl., 65 fms. (2 specimens) 
and 10 miles N. W. of Cap Maria van Diemen, 50 fms. (1 spec¬ 
imen) 5 /i 1915. Further two specimens, dredged W. of Cuvier Isl., 
35 fms., were received from Captain Bol Ion s. 
One of the specimens from Three Kings Isl. is infested with a 
parasitic organism, which may be a Gastropod; but the preserv- 
ation does not allow determining with certainty what it really is. 
This species evidently is nearest related to Ps. albocinctus, but 
it differs so conspicuously from it in the tuberculation, the size 
and shape of the spines and in the colour of test and spines that 
it is out of question that they could be identical. Also it is note- 
worthy that the genital openings have begun to form in a specimen 
of 6,5 mm of variegatus, while in albocinctus they have not begun 
to form in a specimen of 8 mm h. d. and, apparently, have only 
just been formed in a specimen of 15 mm h. d. This would appear 
