172 
land is of importance; it is highly improbable that this notable 
form could have been entirely overlooked in the Northern Seas, and 
there is not the slightest reason why the species should have such 
a remarkably disrupted distribution, occurring all round the South 
Island to reappear only at the northernmost extremity of the whole 
area. 
This type of Echinoids, the genus Pseudechinus , which appears 
to be confined to the New Zealand seas, thus has been shown to 
have undergone a rich specialization here, being represented by no 
less than four different species, two in the Southern, two in the 
Northern region of this area. That these species form two distinet 
groups, albocinctus and variegatus on one side, Huttoni and gros- 
sularia on the other side, is evident. It is, indeed, very well pos- 
sible that they should rather form two separate genera. 
10. Evechinus chloroticus (Val.). 
Echinus (Psammechinus) chloroticus. Hutton. 1872. Catalogue Echin- 
nod. New Zealand, p. 11. 
Evechinus chloroticus. A. Agassiz, 1872. Rev. of Echini. p. 128, 502. 
*P1. IV. b. Fig. 7. 
_ _ H. Farquhar. 1897. A contribution to the history 
of New Zealand Echinoderms. Journ. Linn. Soc. Zool- 
XXVI. p. 188. PI. 14, Fig. 9. 
_ _ h. Farquhar. 1894. Notes on New Zealand Echin¬ 
oderms. Trans. N. Zealand Inst. XXVII. p. 194. 
_ _ H. Farquhar. 1898. On the Echinoderm Fauna 
of New Zealand. Proc. Linn. Soc. N. S. Wales. p. 320. 
Heliocidaris chloroticus. Th. Mortensen. 1903. Ingolf-Echinoidea. I p. 
115—116. PI. XIX, Figs. 6, 12, 29, 39. 
— — H. L. Clark. 1912. Flawaiian and other Pacific 
Echini. The Pedinidæ .... Echinidæ-Mem. 
Mus. Comp. Zool. XXXIV. p 281. 
Evechinus rarituberculatus. F. Jeffr. Bell. 1887. Description of a new 
species of Evechinus. Ann. Mag Nat. Hist. 5. Ser. 
XX, p. 403. PI. XVII. 7-8. 
(For the older literature reference may be given to the works quoted 
of Agassiz and Farquhar). 
The description and excellent figure given by Agassiz (Op. 
cit.), combined with the additional information especially on the 
pediceilariæ found in my „Ingolf“-Echinoidea, make this character- 
