The figure is given to shew the peritoneal funnel of the nephridium. |
Externally, the nephridium opens by a vesicle, as in many Oligochaetes whose lumen is intercellular. |
Portion of nephridium of the hindermost leg of Peripatus capensis, seen in longitudinal and vertical section. |
There are thus substantial reasons for believing that the nephridium grows backwards from a funnel as does the coelomoduct. |
Close to the point where the vesicle joins the coiled section of the nephridium the former has a peculiar nick or bend in it. |