156 
The colour of the test is of a uniform grey, with a slight 
greenish tint 5 the pore areas and the tubercles are white. 
The spines are very short, rather coarse, forming a dense, uni¬ 
form coat. They are dark green, more or less distinctly white- 
tipped, or sometimes with a faint indication of violet at the tip. 
The spines at the edge of the peristome not curved. The secondary 
spines generally somewhat darker than the primary ones; they are 
slightly thickened at the point. 
The peristome is entirely naked as in N. magellanicus, hardly 
with a single bihamate spicule, while such spicules are found 
numerously in the gilis. The buccal plates carry numerous ophice- 
phalous and triphyllous pedicellariæ but apparently no tridentate' 
ones. 
The tubefeet with only very few bihamate spicules or entirely 
without any spicules. 
Pedicellariæ. The globiferous pedicellariæ are of two kinds, 
as in N. magellanicus, a larger and a smaller form, both with double 
poison giands. The valves of the larger form (PI. VII, Figs. 4 5) 
are rather short and robust, with 1 — 2 , more rarely 3, teeth on 
each side of the blade. The small form (PI. VII, Figs. 7 8 ) has 
only one tooth on each side. The small form is found in great 
numbers in the larger specimens, while in the smaller specimens 
they are very scarce. The tridentate pedicellariæ (PI. VII, Fig. 9) 
are small and inconspicuous; the valve is narrow, with a slightly 
widened smaller or larger end part with finely serrate edges. Ophice- 
phalous and triphyllous pedicellariæ (PI. VII, Figs. 10—1 1) offer no 
features of special value as specific characters. The same holds 
good of the sphæridiæ. 
One of the specimens (the smallest, 13 mm h. d.) is infested 
with a parasitic snail, three specimens of which are found attached 
at the border of the peristome. 
Of this species I collected one specimen myself in Paterson 
I nlet, Stewart Island, at a depth of 10—30 meters. A few more 
specimens, dredged in the Foveaux Strait at ca. 40. meters depth, 
were given to me by Captain Bol lo ns, as also one from off the 
i) The colour of test and spines is rather similar 10 that of Parechinus 
angulosus , which explains the identification with that species. 
