130 Transactions. — Zoology. 



due. The material from the Chathams was given to me by 

 Captain Hutton, who received a quantity of material collected 

 by Mr. J. J. Fougere. Captain Hutton, with that liberality 

 that is characteristic of him, has handed over to me all the 

 earthworms contained in his collection at the Canterbury 

 Museum. Further, Mr. H. B. Kirk and Mr. L. Cockayne 

 have provided me with specimens from the same islands. 



As a result of my examination, I have to form four new 

 species, one of which had, however, been previously partially 

 ■described as a " variety " by Michaelsen. The new T species 

 are : Acanthodrilus haplocystis, from the Snares, and Micro- 

 scolex huttoni, Diporochceta chathamensis , and Pontodrilus 

 chathamensis , Mich., from the Chathams. In addition, I can 

 add several details to Beddard's account of the very interest- 

 ing species from Macquarie Island, Acanthodrilus macquari- 

 ensis, F.E.B., and record the existence of the world-wide 

 Allolobophora caliginosa and Allol. rosea, Sav., from the Chat- 

 hams, introduced by the direct agency of man. 



For the present I shall give the characters of the species 

 in a very brief form, as I hope to deal with the whole earth- 

 worm fauna in an extended manner elsewhere. 



1. Acanthodrilus haplocystis, n. sp. 



Two specimens, preserved in formol, collected by Dr. Col- 

 quhoun at the Snares Island. 



Colour. — Light-brown, with a darker ring round the hinder 

 half of each segment in the postclitellian region, giving a 

 coloration not unlike that of A. anncctens. 



Dimensions. — Length, about 11^ in. by fin. (=290 mm. 

 by 6 mm.); cylindrical; with two hundred segments, which, 

 in the preclitellian region, are much annulated. 



Prostomium with prolongation over half the buccal seg- 

 ment. 



Chcetcz. — In couples ; a ventrally placed couple and a 

 laterally placed couple. The separation of the individuals of 

 a couple is equal — i.e., ab = cd ; V (ventral gap) = 2 ab ; 

 D (dorsal gap) = 5 ab ; L (lateral gap) = 1J ab. 



Clitcllum. — Ill-defined, except by its coloration; covers 

 segments 13 to 19 inclusive. The " spermatic groove " con- 

 necting the porophores of 17 and 19 is curved, concave ven- 

 trally, passing outside the ventral couple of chaetas. The 

 latter (ab) are present on each :|: of the segments 17, 18, 19, 

 for there are no specialised penial cha3tse. 



Genital Pores. — Male pores on segment 18 as usual ; sper- 

 mathecal pores between 7/8 and 8/9 in line with chaeta b. 

 Each pore is surrounded by a distinct glandular area, above 



* In tbe immature specimen ; in tbe mature one, however, a alone is 

 present in 17, 19. 



