Oligochaeta.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 289 



duct, which pass up into the gland and there branch, whereas apparently in those 

 just referred to the single lumen in the duct does not begin to branch till the gland 

 has been entered. In the structure of the prostate, Woodwardia callichaeta appears, 

 from Michaelsen's account,* to resemble this new species. But in spite of this small 

 difference there is no doubt that this species has what Michaelsen terms a " Pheretima 

 prostate." He is strongly of opinion that the " Pheretima prostate " has been evolved 

 only once — from the " Plutellus " form of prostate (p. 152) ; nevertheless, on p. 158, 

 he admits that this is not absolutely without doubt — i.e., there is a possibility of the 

 branched lumen having arisen more than once. It seems to me that the present 

 species is a case in point. 



Fam. LUMBRICIDAE. 



Helodrilus, Hoffmeister, 1845, em. Michaelsen, 1900. 



Subgen. Bimastus, H. F. Moore, 1893. 



Helodrilus constrictus, Rosa. 



1884. Rosa, Lumbric. Piemonte, p. 38. 



The occurrence of this common European species on Campbell Island is clearly 

 related to the habitation and cultivation of a patch of garden by the shepherds at 

 the island. Only two specimens were forwarded to me. 



BIBLIOGRAPHY. 



F. E. Beddard. 1889. " On the Oligochaetous Fauna of New Zealand," &c. Proc. 



Zool. Soc. 

 F. E. Beddard. 1890. " Observations upon an American Species of Perichaeta 



and upon some other Members of the Genus." Proc. Zool. Soc. 

 F. E. Beddard. 1891. " Anatomical Description of Two New Genera of Aquatic 



Oligochaeta.'''' Trans. Roy. Soc. Edinburg., xxxvi. 

 F. E. Beddard. 1893. " On the Atrium and Prostate in the Oligochaeta.'''' Proc. 



Zool. Soc. 

 F. E. Beddard. 1895. " A Monograph of the Order Oligochaeta.'''' 

 F. E. Beddard. 1896. " Naiden, Tubificiden, und Terricolen." Hamb. Magal- 



haens. Sammelreise. 

 W. B. Benhara. 1892. " Notes on Two Acanthodriloid Earthworms from New 



Zealand." Quart. Journ. Micr. Sci., xxxiii. 

 W. B. Benham. 1901. " On Some Earthworms from the Islands around New 



Zealand." Trans. N.Z. Inst., xxxiii. 

 W. B. Benham. 1903. "On an Earthworm from the Auckland Islands — Notio- 



drilus aucklandicus. Trans. N.Z. Inst., xxxv. 

 W. B. Benham. 1903. " On the Old and some New Species of Earthworms be- 

 longing to the Genus Plagiochaeta." Trans. N.Z. Inst., xxxv. 



 Michaelsen, Die Fauna S.W. Austral., p. 189. 

 19— S. 



