154 
Echinus angulosus , recorded from New Zealand by Ben ham (and 
Farquhar), has nothing with that species to do but represents a 
new species of the genus Notechinus. For want of sufficient material 
I did not then characterize and name the species. Having now 
partly myself collected some specimens of this species, partly re- 
ceived some more specimens from Mr. W. R. B. 01 i v e r and from 
Captain Bol Ions I here give the description of this new form. 
Apical 
Diameter. 
Height. 
system 
mm 
mm 
mm 
40 
27 
7 
32 
18 
5,5 
24 
15 
6 
17 
9 
4 
13 
7 
3 
Ambulacra 
Peristome. Width. Plates. 
mm mm 
12 9 33—34 
11,6 8 30-31 
9,5 6 22 
7 4 22 
5 3,5 15 
Interambulacra Longest 
Width. Plates. spines. 
mm mm 
14 22—23 7 
11,5 20 5 
8 15 6 
5.5 15 4 
4.5 12 3 
The shape of the test is fairly regularly hemispherical, the oral 
side being flattened, slightly sunken at the peristome. The circum- 
ference is round; in one specimen the interporiferous area of the 
ambulacra slightly prominent. 
The primary tubercles of the ambulacra form very regular, 
close series; on the oral side they stand so close together that 
they must be said to be confluent, being separated only by a quite 
narrow ridge, without any room for even the smallest tubercle; on 
the aboral side they are less close, some few miliary tubercles 
being found between them, but in the larger specimens they are 
generally confluent nearly throughout the whole ambulacrum, so 
that only between a few of the uppermost tubercles a series of 
miliary grains (carrying pedicellariæ) may be found. In the larger 
specimens the boss of the tubercle is not quite round, being dis- 
tinctly cut off at the edge turning against the lower pore of the 
corresponding plate (Fig. 6). The median area is narrow, closely 
covered by secondary and military 
tubercles, the former being about 
half the size of the primary ones 
and forming a pair of distinet long¬ 
itudinal series. Some small second¬ 
ary tubercles are found also among 
the pores. j^cr. g p ar t G f Ambulacrum of 
In the interambulacra the are- Notechinus novæ zealandiæ. 6 /i. 
