96 
Australasian antarctic expedition. 
worm lias but 11 chgotigerous segments bearing notopodial chsetse, followed by the 
uncinigerous segments ; and therefore falls into Malmgren’s genus Ereutho. He 
named it Ereutlio antaretica. 
Consequently, if reliance be placed wholly on the form of the uncinus, which 
certainly is quite peculiar, McIntosh’s Polycirrus kerguelensis is in all probability this 
Ereutho ; but he had already given the specific name “ kerguelensis ” to an Ereutho 
which has quite a different form of uncinus. Hence a new specific name is needed, 
and we must adopt Willey’s name “ antaretica.” 
Gravier (1911) describes, under the title “ Polycirrus kerguelensis Mclnt.,” a 
worm which has 11 chntigerous and 25 uncinigerous segments, whose uncini agree 
precisely with the figures of McIntosh and Willey, and he remarks (p. 143) that it is 
e xtremely probable that it is identical with Willey’s species. 
Later, Elders (1913), under the title “ Ereutho kerguelensis McIntosh ” (which he 
regards as synonymous with Willey’s E. antaretica ), describes a worm with uncini 
agreeing with that figured for Ereutho kerguelensis (not Polycirris kerguelensis) of 
McIntosh, but differing from that figured by Willey for his species. 
Elders states that the only difference between the two is that McIntosh records 
13 chavtigerous segments, while Willey gives the number as 11. Elders himself finds 
both 11 and 12 ; and as the number of notopodial segments is variable, he concludes 
that the two species are identical. But this leaves aside altogether the marked 
difference between the uncini in the two cases. 
Elders refers to the conspicuous anterior lip of the anterior notopods produced 
into a “ papilliform process ” (McIntosh), but neither author figures it. I do not see 
any such striking feature in the present worms; the lips are nearly of a size. 
The present collection contains specimens of this species, without their tubes. 
The worms are for the most part coiled, and measure about 12-15 mm. with a diameter 
of 3 mm. anteriorly. 
There are 11 segments bearing notopods with capillary chsetse, followed by 
25-30 segments carrying short projecting uncinigerous neuropods. The first notopod 
is on the third segment above the first pair of ventral gland shields. 
A mounted piece of the thoracic pre-uncinigerous region shows none of the 
peculiar hooks below the capilliform chsetse such as Elders describes in his Ereutho 
kerguelensis. 
The present worms agree generally with the account given by Gravier. 
Locality .-—■ 
Boat Harbour, 3| fathoms. 
Distribution .—Kerguelen (McIntosh), South Victoria Land (Willey) Petermann, 
and South Shetlands (Gravier). 
