POLYCH^ETA-BENHAM. 65 



Below each of the first eight notopods is a small nephridial papilla, lying just 

 outside the gland shields. 



The notopods commence on the second segment and are repeated along the 

 greater part of the worm, i.e., for 30-34 segments ; they are rather prominent, with 

 the posterior lip produced beyond the anterior (fig. 102). The chsetee are of two 

 kinds (a) those of the usual type with an symmetrical apex, a flange on one side, 

 the sloping margin being finely striated (fig. 103) ; and (b) more slender, symmetrical 

 and without a flange, but with very fine denticulations along each edge (fig. 104). 

 There are about ten of each kind in the anterior notopods, but posteriorly the number 

 of each becomes fewer, and the slender form (b) may be absent. 



The neuropods commence below the 12th or 13th notopod ; the uncini are 

 uniserial; each has a short manubrium or base, and bears two teeth (fig. 105) with 

 a thin curved undivided hood above them (fig. 106). Behind the teeth there is a small 

 projection from the base as usual, but I cannot, in spite of careful search, detect any 

 knob springing from the base in front of the teeth, such as Gravier figures for P. insignia ; 

 not even so much of a hump as Mclntosh figures for Ereutho kerguelensis . 



Locality. 



Macquarie Island, Garden Bay. 



Remarks. This worm does not agree with any that have been described from the 

 Antarctic or Sub antarctic seas. It bears some resemblance to P. insignis 

 Gravier (1906, p. 54), in which, however, the first notopod is on the fourth 

 segment and there are 11 notopods only, so that it should be placed in the 

 genus Ereutho, if we follow Malmgren ; but Gravier accepts De St. Joseph's 

 views on this matter. 



Genus EREUTHO Malmgren. 

 EREUTHO ANTARCTICA WUley. 



Willey (1902), p. 281, pi. XLII, fig. 6; pi. XLVI, fig. 6. 

 Pdycirrus kerguelensis Mclntosh (1885), p. 475, pi. XXVIII A, fig. 22. 

 Polycirrus kerguelensis Gravier (1911), p. 141, pi. XI, fig. 136. 

 nee. Ereutho kerguelensis Ehlers (1913), p. 365. 



In the " Challenger " Report Mclntosh describes two species of Polycirrids from 

 Kerguelen, namely Ereutho kerguelensis (p. 474), and on the next page, Polycirrus 

 kerguelensis. The latter was an ill-preserved fragment, and no details about its 

 structure are given except that the uncinus is characterised by a very long manubrium, 

 and bears two stout short teeth. 



Willey, in his report on the " Southern Cross " annelids gives a brief account 

 of a Polycirrid from S. Victoria Land which exhibits precisely similar uncini, but the 



