POLYCHYETA—BENHAM. 
81 
Again, the ventral “ cirrus ” in the posterior feet, commencing on the 
10th, undergoes reduction till it is a short obtuse “ mamelon,” which is not 
true for S. mawsoni, where it does not begin to become smaller till at or about 
the 50th segment. 
It seems, then, evident that there are two species of Scoloplos in these 
southern waters. That of McIntosh, Elders, and Fauvel on the one hand, and 
the present species and that described by Gravier on the other. It remains 
to be seen to which of these should be ascribed those recorded by Willey 
(1902) under the title of McIntosh’s species. 
Family CIRKATULIDA5. 
Genus Cirratulus Lamarck. 
ClRRATULUS CIRRATUS 0 . F. Muller. 
Muller (1776), p. 214 (not seen.) 
C. cirratus Malmgren (1867), p. 95. 
Promenia jucunda Kinberg (1865), p. 254. 
Promenia fulejida Elders (1897), p. 114, pi. VII, figs. 174-176. 
Cirratulus cirratus Fauvel (1916), p. 447 (where list of synonyms and biblio¬ 
graphy will be found). 
Fauvel compared specimens from Falkland Islands, which agree in every feature 
with Ehlers’ Promenia fulgida, with the northern form, and was unable to detect any 
constant differences between them. He therefore arrives at the conclusion tabulated 
above. 
Members of the family are evidently rare in these southern seas, for Gravier 
reports on only one Cirratulus sensu lato (1911), while Ehlers (1913) gives but little 
information about the few that were collected by the German expedition, leaving 
most of the fragments unnamed. 
The present collection includes a number of specimens from the Boat Harbour, 
and others from the Macquarie Island, some five or six in each gathering. 
Although well known from the Sub-antarctic region, all round the Pole, this is 
the first time that it has been recorded from the Antarctic Sea. 
Localities .— 
Boat Harbour, Commonwealth Bay, 2-4 fathoms. 
Macquarie Island (low water under stones and in rock pools); collected by 
Mr. Hamilton. 
Distribution. —South Georgia, Kerguelen, Magellan Strait, Fuegia, Falkland Islands; 
and also Atlantic and Arctic Oceans, 
*83892—L 
