244 Transactions. 



present no trace of a clitellum, but the ventral surface of seg- 

 ments 17-19 is rather paler than elsewhere. 



Spermathecal Pores. — Two pairs, 7/8, 8/9. 



Dorsal pores commence at 10/11. 



Interna 1 Anatomy. — The dorsal vessel is double, uniting at 

 the septa. They are not enclosed in a common perivascular 

 tube such as Beddard described for D. benhami. 



The last heart is in segment 13. 



There is a small gizzard in segment 5. (Esophageal glands 

 are in 16/17, and the intestine begins in the 18th segment. 



There s but a single pair of testes visible in sections, and 

 these lie in segment 10 ; but in addition to the sperm-funnels in 

 this segment there is a second and very minute pair in the 11th 

 segment, rather larger than a nephridial funnel. It is possible 

 that the absence of the testes in this segment is due 1o imma- 

 turity. 



No sperm-sacs are developed. 



The two pairs of prostates are, of course, quite small, in seg- 

 ments 17/19. 



The two pairs of spermathecse are in segments 8/9. Each is 

 a subspherical sac, with a sma 1 ! pyriform diverticulum opening 

 into the duct, close to the body- wall. 



Loc. — Swanson, about fifteen miles from Auckland, in rotten 

 logs. 



Remarks. — The only previous record of this genus is the 

 account given by Beddard,* in 1888, of D benhami, which 

 was obtained near Lake Brunner, in Westland. This new 

 species differs from it in its much smaller size, in position of the 

 gizzard, the absence of the second pairs of testes, and form of 

 the spermathecse. 



EXPLANATION OF PLATE XL. 



The illustrations of the external anatomy of the earthworms described 

 in this article are purely diagrammatic, indicating only the segmental 

 position of the various organs, the worm being supposed to be slit up along 

 the dorsal line and the body-wall pinned aside. 



The location of the various genital pores is represented as round black 

 dots (if on a papilla this is left white), the clitellum is obliquely shaded, 

 the tubercula pubertatis are vertically shaded. 



In addition, the arrangement of the. chsetse — labelled a. b, c, d — is 

 indicated in segments 5 to '23 on one side ; they are omitted on the othei 

 side for cloarness' sake. The true relative spacing of the charta* is shown. 



No attempt is made to give the relative sizes of the worms or of the 

 various organs. 



* Quart. Journ. Micr. Sci., xxix. p. 105. 



