180 
Through Captain Bol Ions 1 received a single specimen, taken 
off Hen and Chicken Islands in a depth of 55 meters. Unfortun- 
ately it is only a naked test, so that I have no means of ascert- 
aining, whether the New Zealand form agrees wtth the typtcal L 
depressum also in the microscopical characters of the sptnes an 
pedicellariæ. The shape of the test agrees very well wtth the sa.d 
species, only the anal area is scarcely so close to the edge o e 
test as is usually the case in this species; also the edge of e 
test is rather more flat than it is generally the case in L. depres¬ 
sum. The specimen is 38 mm long, 32 mm broad. 
It is quite possible that this species, which is new to New 
Zealand, will ultima.ely prove to be differen. from L. depressum , 
but for the present it must be referred to that species. As it is 
known to occur in Australian seas it is not surpristng to n it 
also in New Zealand seas. 
It does not seem possible that it could be this species wh.ch 
has given rise to the statement of Laganum rostratum occurr.ng in 
New Zealand seas. (A. Agassiz. Revision of the Echim. p. 523). 
Whether rostratum be a good species or not, its very dtfferent shape, 
and especially the faet that L. rostratum has four genital pores, 
the present form five, would seem to preclude the idea that they 
could have been confused. Most probably it is only a wrong labe 
which has caused the said statement. 
16. Arachnoides zelandiæ Gray. 
PI. VI. Figs. 24-25; PI. VII. Figs. 25-30. 
Arachnoides zelandiæ. j.Gray. 1855. Catal. Recent Echinida in the 
Coll. of the Brit. Mus. p. 14. Tab. II. Fig. 2. 
_ _ h u tto n. 1872. Catal. Echinod. New Zealand, p. 12. 
- placenta. A. Agassiz. 1872. Revision of the Echini; p. 
530. PI. XIII, b. Figs. 1-4. 
zelandiæ. S. Lovén. 1875. Études sur les Échinoidees, p. 
34. PF LI I, Figs. 251-255. 
- placenta. Farquhar. 1894. Notes on New Zealand Echin- 
oderms. Trans. N Z. Inst. XXVII, p. 197. 
_ Farquhar. 1898. Echinoderm Fauna of New Zea¬ 
land. Proc. L. Soc. N. S. Wales. p. 321. 
_ _ Benham. 1907. Sci. Res. N. Z. Governm. Trawl¬ 
ing Exped. Echinoderma. Rec. Canterbury Mus. I. 
p. 28. 
Non: Arachnoides placenta (Linn.). 
