254 DISCOVERY REPORTS 



maximus ; while the glands round the ectal end extend much further up the duct — as far 

 as the base of the ampulla — in lineatus. 



Lumbricillus macquariensis, Benham (Fig. 7). 



Liimbricillus macquariensis, Benham, 1905, p. 295, pi. xiv, figs. 8, 11, 12, 13. 

 Lumbricillus intermedius, Benham, 1909, p. 261, pi. x, figs. 8-11. 

 Lumbricillus macquariensis, Benham, 1915, p. 189. 

 Lumbricillus macquariensis, Benham, 1922, p. 6. 

 Pachydrilus intermedius, Michaelsen, 1923, p. 197. 



Undine, South Georgia, iii. 26. Six specimens, mostly mature. Note by collector :" Specimens 

 of Crustacea, Oligochaeta, Coleoptera, dipterous larvae and puparia, and apterous Diptera found 

 living together under stones on the upper edge of the beach at Undine Harbour, South Georgia." 



The present species has hitherto only been known from the islands to the south of 

 New Zealand (Macquarie, Auckland and Campbell Islands) ; it is interesting, therefore, 

 to find it now in South Georgia in the same latitude as these islands but distant from 

 them by nearly half the circumference of the globe. Since this distribution is possibly of 

 some importance, I give below some particulars which will permit other workers to 

 check my identification. 



The specimens are the stoutest worms in the present collection ; the largest is about 

 22 mm. long (all are more or less curled) and 1-25 mm. thick, while a smaller one, also 

 sexually mature, is 15 mm. long and i mm. thick. The largest has 72 segments, the 

 smaller specimen 52; the external segmentation is well marked. I did not find the 

 prostomium as in Benham 's L. intermedins — "rather long, about equal to the first two 

 segments together" — but blunt and rounded. 



The ventral setae are 6 (7) in the preclitellar, (4) 5, 6 in the postclitellar bundles; the 

 numbers for the lateral setae are 5, 6 and 4, 5 respectively. 



The clitellum, as seen in sections, includes segments xii and xiii and encroaches 

 slightly on xi and xiv ; it is absent mid-ventrally. 



There are numerous deeply staining gland cells in the integument, in irregular trans- 

 verse rows ; the furrows, however, are free from these cells. 



The coelomic corpuscles are subcircular or irregularly shaped disks, 18-24/x in 

 diameter, nucleated and of granular constitution, numerous and all of one kind. 



The septal glands are bulky, the hindmost, belonging to segment vi, projects back- 

 wards into vii so as to reach a level not far from septum 7/8. 



Postpharyngeal bulbs are present, as usual in the genus, but no salivary glands. 



The dorsal vessel begins in segment xv ; the intestinal sinus may be somewhat swollen 

 dorsally in xvi, though a definite vessel does not seem to be present here. 



The nephridia are conspicuous organs in sections, more so than usually. The ante- 

 septal is small, though it includes a little more of the organ than merely the funnel. The 

 postseptal seems contracted antero-posteriorly, short and " hunched up " in appearance, 

 and may be of greater extent vertically than from front to back. The duct is given off 

 from the hinder end of the organ, and is usually longer than the postseptal — indeed it 

 may be quite double the length; it passes down, or sometimes downwards and back- 



