POLYCHJETA-BENHAM. 53 



An imperfect individual, consisting of the anterior end of about 65 segments, 

 appears to belong to this species. It measures 20 nun. in length and 2-5 mm. in 

 width. 



Most of the cirri are broken ; the colour is yellowish brown, with dark greenish- 

 blue patches, more or less extensive, irregular in shape and size, arranged along the 

 dorsum ; they may be due to post-mortem changes. 



Of the tentacular cirri only one, on the left side, and two on the right, remain. 

 But the general agreement of the head, the parapod and the chsetoe, with the account 

 given by Ehlers, inclines me to place the worm in this well-known Sub-antarctic species. 



Locality . 



Macquarie Island, rock pool. 



Distribution (In the Antarctic and Sub-antarctic regions). Magellan region (Kin- 

 berg), Fuegia, Chilian coast, Kerguelen, Kaiser Wilhelm II Land, Coulman 

 Island (Ehlers), Biscoe Bay, Petermann (Gravier). 



EULALIA (PTEROCIRRUS) HUNTER:*, sp. nov. 

 (Plate 7, figs. 48-52.) 



The single individual is complete ; it measures 165 mm. in length, by 2-25 mm. 

 over the body, and 6-5 mm. over the dorsal cirri, which are directed outwards. Anter- 

 iorly the diameter of the body is but 1 mm. ; the greatest breadth is about 20 mm- 

 from this end, and is retained for rather more than one-half the total length, whence 

 the body tapers gradually. This breadth of body is equal to 4 segments. 



The colour of the body is flesh-pink, with a pair of very dark blue, nearly black, 

 irregularly quadrate spots on each segment about midway between the nud-dorsal 

 line and the lateral margin (fig. 48). These spots commence at the 9th segment. In 

 the hinder quarter of the worm they extend medially till they meet, so that these 

 segments are crossed by a series of dark bands. 



The dorsal and ventral cirri are yellowish ; the ventral surface is of the same 

 colour as the ground tint of the dorsum. 



The body is convex dorsally, flat ventrally; the parapods are short, and the 

 dorsal cirrophore is close to the body. The dorsal cirri are of considerable size, nearly 

 as long as the body breadth, and are not relatively shorter on the anterior segments. 



The prostomium is colourless, its breadth is rather greater than the length 

 (fig. 49), and a slight notch on the posterior border, and also at the level of the insertion 

 of the tentacles, gives it a trefoil shape. 



* I take this opportunity of associating with this handsome annelid tho name of Mr. .1. (!. Hunter, the able biokopxt 

 of the Expedition, 



