KERGUELEN ISLAND. 283 
sented by P. scaber, KE. Sm. Other species are found at Marion Island 
and South Georgia, in addition to one West Indian and several North 
Atlantic forms. Luidiaster hirsutus, Studer, is a peculiar form allied 
to Pontaster. Gnathaster meridionalis, KE. Sm., and G. elongatus, 
Sladen, both occur also at the Crozets, and belong to a small genus 
known also from the Australian and Magellan regions. One species, 
indeed, G. paxzllosus (Gray), is said to occur both at Sandy Point and 
in the Eastern Archipelago off the coast of North Australia. 
The cosmopolitan <Astertas is represented by A. studeri, Bell, 
A. triremis, Sladen, and A. scalprifera, Sladen, in addition to the 
species from shallower water already alluded to; Solaster, by 
S. subarcuatus, Sladen; Cribrella by C. simplex, Sladen. Perknaster 
is a peculiar genus allied to Cribredla, of which the two known species, 
P. fuscus and P. densus, Sladen, are both from this region. The 
nearly cosmopolitan Pteraster has two species, P. afinis, Smith, and 
P. rugatus, Sladen; and the very closely allied Retaster has one 
species, R. peregrinator, Sladen, not very different from &. verrucosus, 
Sladen, from the Straits of Magellan ; the genus is known from the 
Cape of Good Hope, the Indian Ocean, and also from the North 
Atlantic. Bathybiaster loripes, Sladen, of the Magellan region, is here 
represented by its variety obesa; the genus has two other species in 
the North Atlantic. 
The cosmopolitan Gorgonocephalus has one species, G. Pourtalesii, 
Lym., occurring also at the Crozets and East Patagonia. Of the more 
typical Ophiurids, many if not most have also been taken at the 
Crozets, a few, such as Ophiocten amitinwm, Lym., Ophiacantha vivi- 
para, Lym., also in the Patagonian region, and one, Ophiomyxa 
vivipara, Studer, both in the latter region and at the Cape of Good 
Hope. 
Among the Holothurians we have several species of Psolus, 
P. wcertus, Théel, P. ephippifer, Wy. Th, and P. poriferus, Studer, 
all said to be peculiar to the region. The last-named is very briefly 
described. P. ephippifer, Wy. Th., is very like P antarcticus, Phil., 
from Magellan, and not very different from the northern P. squamatus. 
The cosmopolitan genus Thyone has two species and Cucwmaria two. 
We have also Trochostoma violacewm, Studer, a form not very different 
from the northern 7. boreale, M. Sars. 
To the Pyenogons already alluded to in connection with the 
Macrocystis zone we may add Nymphon fuscum, Hoek (if it be 
different from WV. gractlipes, Miers), and two species of Colossendeis, 
C. megalonyx, Hoek, and CO. robusta, Hoek, of which the former is 
known also from the Patagonian region. 
