291 Transactions. — Zoology. 



as an extremely abnormal species of that genus : though it is 

 true that in no other species is the spermiducal gland provided 

 with such a long muscular duct. 



Marionina antipodum, n. sp. 



Four small Enchytreeids appear to belong to this new species. 

 The longest is 11 mm. in length and 075 mm. broad, with 35 

 segments. 



The chaetse are very feebly sigmoid, the points being slightly 

 curved : there are nearly constantly four in each bundle through- 

 out the body, only in a few anterior segments are there five in 

 each bundle. 



The clitellum is girdle-like, completely covering segments 12 

 and 13. 



The usual head-pore was noted. 



The oesophagus passes gradually into the intestine, being, 

 however, rather dilated in segments 8, 9, and 10. 



There are four pairs of septal glands, lying in segments 4, 5, 6, 

 and 7. 



The dorsal blood-vessel commences at the hinder end of the 

 13th segment, and immediately in front of its origin it becomes a 

 good deal dilated, but no " cardiac body " is present. The blood 

 was in life apparently colourless, as the blood-vessels, instead of 

 being filled with a red-stained or yellowish coagulum, are empty. 

 In an entire specimen (stained) I was unable to detect the vessels ; 

 but in transverse sections the dorsal vessel appears as a small 

 empty tube with a single nucleus on either side ; while even 

 anteriorly the ventral vessel appears to be closely adherent to 

 the oesophageal wall. 



The segments 10 and 11 are filled with spermatozoa, and the 

 septum 11/12 is pushed back to the end of the 13th segment. 



The testes are quite small and relatively loose in structure. 

 though there are no definite lobes, the edge being slight 1 y 

 frayed. 



The sperm-funnel is a good deal curved in the entire specimen, 

 but appears to be about four times as long as its breadth. 

 The. penial apparatus (Plate XIV., fig. 9) is comparatively small, 

 as it scarcely exceeds the thickness of the longitudinal muscles 

 of the body- wall. Opening into it, however, is a conspicuous 

 prostate gland. 



The spermatheca (Plate XIV., fig. 10) is a long pyriforni 

 organ, in which the muscular duct is not distinctly marked off 

 from the sac, which, moreover, is empty in all the individuals 

 examined. The duct is without glands, but at the pore is a 

 couple of groups of gland-cells — one anterior and one posterior. 



It should be noted that the longitudinal muscles, instead of 



