VII] EARTHWORMS OF OCEANIC ISLANDS 111 



P. schmardae, P. hesperidum, P. morrisi, P. per- 

 kinsi, P. himriaUs (= P. elongata), AUolobojjhora 

 putris (=Kinberg's Hypogaeon havaicum), A./oetida, 

 A. caliglnosa, A. nordenskwldi, A. limicola, A. rosea, 

 and finally the well-known Pontoscolex corethrurus. 

 Of these species there is only one which is even 

 possibly a form limited to the Sandwich Islands, and 

 that is Pheretima perkinsi, a species which I myself 

 at first described as a new form, bnt which was after- 

 wards regarded as identical with P. hetei'ochaeta by 

 Michaelsen, and later still resuscitated by Ude. All 

 the others are found in many parts of the world and 

 not only in the nearest mainland to the archipelago 

 which we are now considering, I have had already 

 occasion to speak of some of them as peregrine forms, 

 especially of Pontoscolex corethrurus which occurs 

 all over the world. 



The conditions which have been recently revealed 

 by an exploration of the antarctic islands mentioned 

 above are totally different. Dr Benhani has enu- 

 merated the following species from those islands, viz. 

 Notiodrilus haplocijstis, N. fallax, N. aucldandicus, 

 N. campbeUianus, N. macfpiariensis, Plaglochaeta 

 plimheti, Rhododrilus corlni/td, Leptodrilus leptome- 

 rus, L. magneticus, Plutellus aucMaudicus, Diporo- 

 chaeta heterochaeta, D. hrachi/soma, D. helo/didfr, 

 D. perlongchopsls among the Megascolecidao, besides 

 Phreodrilns atmjtbcHianus, Pelodr'dus tubercubftns, 



