Benham. — Oligochceta from the Southern Islands. 295 



consisting of a single row of fibres, present several layers, as 

 Ude has noted in Lumbricillus verrucosus, 

 hoc. Antipodes Island. 



Remarks. — I cannot fit this worm to any of the species diag- 

 nosed in Michaelsen's monograph.* It does not agree with any 

 of the South American forms described by Ude ;f for, amongst 

 other differences, I do not find any " subneural glands " in the 

 present worm, although the specimens sectioned are sexually 

 mature. 



Enchytraeus albidus, Henle. 



Specimens indistinguishable from this widely distributed 

 species were collected on Campbell Island, close to the sea ; and 

 I have specimens from Macquarie Island, which were collected 

 some years ago. I may add that a re-examination of the worm 

 collected and named E. simulans by mej convinces me that this 

 name must be eliminated : they are E. albidus, as I at first 

 imagined them to be. 



Lumbricillus macquariensis, n. sp. 



Several specimens of this Enchytroeid were collected some 

 years ago by Mr. Hamilton on Macquarie Island, and are 

 entered in the Museum register by the late Professor Parker as 

 " small Oligochseta from brackish pools, with Siphonaria, plan- 

 arians, &c." I take this opportunity of giving an account of 

 this species. 



Length, 23 mm. ; breadth, 1*25 mm. ; with 60 segments. 



Chsetae very feebly sigmoid and relatively small, in the usual 

 four bundles of 4-7 per bundle. Anteriorly there are in several 

 segments six dorsal and four ventral, while in the 2nd segment 

 six dorsal and seven ventral. Posteriorly the usual numbers 

 are four or five dorsal and six or seven ventral. There are no 

 ventrals in segment 12, and the dorsals are few in the 12th and 

 13th segments. 



The clitellum covers segment 12 and part of the 13th, ceasing 

 at the level of the chaetoe. The male pore, in 12, is in some cases 

 prominent owing to the protrusion of the terminal organ. 



The usual head-pore is present between the prostomium and 

 the 1st segment. The oesophagus passes very gradually into the 

 intestine, which commences in the 15th segment. There are 

 three pairs of septal glands, as usual. 



The dorsal blood-vessel arises either at the hinder end of the 



* Michaelsen, " Das Tierreich : Oligochseten," 1900. 



f Ude, " Enchytraeiden,' ; in Hamb. Magalhaen, Sammelr., 1896. 



% P.Z.S., 1903, vol. ii., p. 219. 



