Southern — Monograph of the British and In'bh Oligochceti. 153_ 



9 setae. The coelomic corpuscles are oval or pear-shaped, granular, and 

 nucleated. The clitellum is very prominent, and occupies segment 12 and 

 half 13. The dorsal vessel rises in the 13th segment (Ude says between the 

 14th and 15th segments). 



January, August. 



Hahitat—lx^QMA. On shore at Killiney, Co. Dublin. 

 ■Scotland. Aberdour, Fife. 



Distrib ution — Denmark. 



Lumbricillus Pagenstecheri (Eatz.). 



1900. L. jJ., Michaelsen in Tierreich, x., p. 83. 



1902. L. Henkingi, Ude in Fauna Arctica, Bd. ii., p. 9, Taf . ii., figs. 15-18. 



This species occurs commonly in manure and garden soil. I have also 

 found it in brackish water near the sea. 



In specimens from England the nephridia were peculiar in having no 

 differentiated duct, the postseptal continuing of the same diameter up to 

 the external pore. The size is 8-10 mm. Sette, 4-7. Only two pairs of 

 commissural vessels enter the two anterior loops of the ventral vessel, in 

 front of the junction of the latter, and not three, as Vejdovsky (27. Taf. 14, 

 fig. 6) figures. 



Ude separated L. Henkingi from this species on account of the structure 

 of the copulatory glands, all other characters being approximately in agree- 

 ment. There seems nothing in the figures given to justify this proceeding, 

 especially as the copulatory glands vary considerably in the same species. 



January, March, April, May, August. 



Habitat— liolnml. Co. Dublin (Baldoyle, in brackish water; Killiney, in 



manure) ; Co. Sligo (Tobercurry, in celery roots). 



England. Lancashire (Adlington, in garden manure). 



Distribution — Spitzbergen; Denmark; Germany; France ; Bohemia. 



Lumbricillus niger n. sp. 



Plate X., fig. 12, a-d. Plate xi., fig. 12, E, F. 

 This species is at once distinguished by its dark appearance. To the 

 naked eye it appears quite black. This is due to the presence of very dark 

 brown pigment in the cells which cover the gut (PL x., fig, 12, A). They are 

 small, with granular contents, and there is a small, clear space in the centre 

 of each. In the anterior segments these cells are absent, and the head of the 

 worm' is of the normal pink colour. They begin sparsely in the 4th segment ; 

 and from the 8th segment onwards they surround the gut and the dorsal 

 vessel. 



[2 ^*] 



