94 AUSTRALASIAN ANTARCTIC EXPEDITION. 



Genus LEPREA Mdmgren. 

 Leprea streptochaeta Ehlers. 

 Ehlers(1897),p. 130,pl. VIII, figs. 203-205. 

 Ehlers (1913), p. 560. 

 Fauvel(1916), p. 465. 



A single individual of this species was received from Macquarie Island, where it 

 lives in rock pools. 



It was still invested in its sandy tube, and the animal, which is somewhat coiled, 

 as both Ehlers and Fauvel found to be the case, measures about 45 mm. with an anterior 

 breadth of 3 mm., tapering posteriorly. 



I have nothing to add to the full accounts already published. 



Distribution. — Kerguelen, Falkland Islands, Uschuaia. 



Genus Polycirrus Gruhe. 



POLYCIRRUS HAMILTON I S'p. nOV. 



' (Plate 9, figs. 101-106.) 



A number of well-preserved worms, enclosed in tubes of dark sand-grains, were 

 found by Mr. Hamilton attached to rocks at low water on the Macquarie Island. 

 They are described as being " pink in colour." 



The worms are for the most part a good deal twisted, some are broken, but 

 amongst them a few that are complete. 



A complete specimen measures from 25-35 mm. in length, with a breadth of 

 2 mm. One mature female, filled with eggs, has a length of 25 mm. and contains 55 

 segments ; another of 35 mm. has 50 segments. 



The numerous tentacles are of considerable length. 



There are 30-34 bristle-bearing segments, which commence on the 2nd. The 

 uncinigerous neuropods commence in one case on the 7th, in another on the 11th 

 chsetigerous segment. 



There are 13 paii's of gland shields preceded by a median shield on the first or 

 peristomial segment (fig. 101). This gland is pentagonal in shape with its lateral 

 angles somewhat rounded ; ^t is crossed by a curved shallow furrow from side to side. 

 Then follow the series of paired glands separated by a narrow but deep groove mesially. 

 The first of these, which lies on the first chsetigerous segment, is subtriangular, with 

 its anterior side fitting against the latero-posterior border of the pentagonal gland and 

 its apex directed mesially. The remainder are more or less quadrate. These are 

 followed by three widely separated pairs of smaller size. 



