1904.] 



EARTHWORMS FROM NEW ZEALAND. 



241 



present on the hinder margin of segments 16 and 17, [mediad 

 of the Kne a. 



The two ovidvical pores are close to the median line, near the 

 anterioi- margin of the 14th segment. 



Text-fiff. 62. 



14 

 15 

 16 

 )7 



1 ' \ ' '^ I 



^ 7T\ 



' \ 



' V 



Text-fisr. 63. 



\B A f (9) 

 A f ^ 



(D \ 



/ \ 



V 





A B 



Text-iig-. 62. Tokea esotdenta. — Ventral view of clitellar region, &c. (X4), showing 

 male pores and arrangement of tubercula pubertatis and disposition of chajtae. 

 This and the views in text-figs. 68, 70, 73, 76, 78, and 80 are somewhat diagram- 

 matic in that they are represented as flat projections, but the relative spacing of 

 the chajtas, &c., is correct. 



Text-fig. 63. Tokea esculenta. — Enlarged view of the male pore, the actual aperture 

 is situated on a small papilla (C) which projects from the bottom of a pit (B), 

 the skin round which is paler (A) than the surroundings. Tlie chajta b is 

 shown on the left side. 



There are three pairs of spermathecal pores on the hinder 

 region of segments 6, 7, and 8 ; these are not intersegmental, but 

 are situated about midway between chfeta a and the margin, in 

 each case. 



1 could not detect doi'sal pores. 



Internal Anato'iny. 



There are 8 stout septa, behind segments 7 to 14 ; but, in com- 

 parison with the thickness of the body- wall, their thickness is not 

 so great as one would expect. 



The dorsal vessel is single ; the last of the foiu' pairs of hearts 

 is in segment 13. In the heart- segments there is a supra-enteric 

 vessel, with which the hearts are in part connected. 



The worm is micronephric*, and these organs commence in 

 segment 3. In the last 20 segments of the body there is, in 

 addition to micronephridia, a pair of compact groups of tubiiles 



* I think this term, which was first employed by Vejdovsky, is preferable to my 

 term " plectonephric," for it is by no means certain that a " network " of tubules 

 always (if ever) exists. 



Proc. Zool. Soc— 1904, Vol. II. No. XVI. 16 



