ENCHYTRAEIDAE 



257 



Fig. 8. Lumbricillus 

 antarclicus; sperma- 

 theca as reconstruct- 

 ed from sections; a 

 glandular mass en- 

 velopes the whole of 

 the duct. 



penetrate within the epitheHal layer of the ampulla. The duct is short ; the narrow lumen 



of the duct expands rather suddenly at its upper end to become the cavity of the ampulla ; 



in this sense ampulla and duct are fairly well marked off from each 



other, though externally there is no very precise delimitation. A 



complete circle of glands surrounds the whole length of the duct 



and embraces the base of the ampulla ; the glandular mass is lobed, 



and consists of the bodies of the cells of the duct epithelium, all the 



cells being prolonged through the muscular coat, which is visible as 



a single layer of fibres running longitudinally on the duct; there are 



no nuclei in the basal portions of the cells internal to the muscular 



layer. 



Copulatory glands are present in segments xiii, xiv and xv; they 

 are of moderate size, and leave the dorsal surface of the cord quite 

 free ; those in xiii are rather smaller than those of the other seg- 

 ments. 



The present species is related not distantly to L. lineatus, but 

 appears to be distinguished from it by the shortness of the male 

 funnel ; it is alone among the southern species of this genus in having these propor- 

 tions. 



Genus Enchytraeus, Henle 



Enchytraeus albidus, Henle. 



Enchytraeiis humicultor, Ude, 1896, p. 26. 

 Efichytraeus humicultor var. similis, Ude, 1896, p. 27. 

 Enchytraeus albidus, Michaelsen, 1903, p. 142. 

 Enchytraeus albidus, Michaelsen, 1905, p. 8. 

 Enchytraeus albidus, Michaelsen, 1905 a, p. 17. 

 Enchytraeus albidus, Benham, 1905, p. 295. 



St. 122. 14. xii. 26. Maiviken, West Cumberland Bay, South Georgia. Shore coll., fresh water. 

 Several specimens, mostly with signs of sexual maturity. 



Same locality and date. Under stones near upper lake ; along with E. australis. Several specimens. 



This is one of the Enchytraeids of the northern hemisphere which is also found in 

 southerly latitudes ; in the list of papers given above it is recorded from South Georgia 

 (Bay of Isles), Tierra del Fuego and the Straits of Magellan, the Falkland Islands, the 

 Campbell and Macquarie Islands, Kerguelen, and the Crozets. With the possible 

 exception of Lumbricillus lineatus, it is perhaps the commonest member of the family in 

 Europe; L. lineatus is found predominantly on the shore, but also inland, while 

 E. albidus is predominantly terrestrial but is also found on the shore. 



The sections of the present specimens attracted my attention by reason of the very 

 wide central lumen of the sperm funnels. 



