Benham. — On Lumbricillus macquariensis. 



191 



'' L. intermedins " is synonymous with L. macquariensis, so that this species 

 has a distribution over the three subantarctic islands. The figures of the 

 spermatheca, subneural glands, and sperm-funnel as given for "inter- 

 medins " must replace those given in the article on L. macquariensis. 



Moreover, it is, it seems to me, closely allied to L. natriums Michaelsen 

 (3, p. 10), from which it differs in its smaller size, for that is stated to 

 measure 40 mm. in length, whereas our species does not exceed 25 mm.. 

 and some of the mature individuals are less : and the variety of L. maximus 

 termed " robinson " is but 12-16 mm. in length, but the clitellum is inter- 

 rupted on the ventral surface. 



References. 



1. Benham. " On the Oligochaeta from the Southern Islands of the 

 New Zealand Region: 1 Trans. N.Z. Inst., vol. 37, 1905. 



2. Benham. l Report on the Oligochaeta " in '* Subantarctic Islands 

 of New Zealand." 



3. Michaelsen. Die Oligochaeten : Deutsche Sudpolar Expedition, 

 1901-3." 



Table showing the Numbers of Chaetae, etc. 



l. 

 2. 

 3. 

 4. 

 5. 

 6. 

 7. 

 8. 



L. macquariensis (type) 

 (cotype) 

 (H.H.) 

 (H. H.) 

 (H. H.) 



" L. intermedin* " 



Chaetae. 



Pre-clitellar. 



1'n-t-clitellar. 



D. 



V. 



D. 



6(5) 

 6(7) 

 5(6) 

 6(7) 



4 

 5 



6(5) 



V. 



Subueural 

 Glands. 



i Origin of 

 D. Vessel. 



14, 15, 16 



14, 15, 16 



14, 15, 16 



d 



14, 15, \U 



14,15,16,17 



14, 15, 16 

 14,15,16,17 



13 or 14 



1 



16c 

 15 

 15 

 17 

 16 

 •? 



Notes to the Table. 



The numbers enclosed in brackets occur less frequently along the body. 



a. In one segment there are 7 chaetae. 



b. There is considerable irregularity throughout the body in this individual, the 

 number in each bundle often differing in successive segments, and on the two sides of the 

 body ; thus each of the segments ii and iii has 8 chaetae on one side and 6 on the other. 



c. In one individual sectionized the dorsal vessel occurs in the 17th segment. 



d. In one individual there are 6 glands in segments 13-18, the largest being in 

 the 15th ; but in two other specimens only 3 glands exist, but I did not correlate 

 them with the chaetal formula. 



? The fact was not observed in these specimens. 

 II. H. Specimens collected by Mi-. H. Hamilton. 



