STJTEK : ON NEW ZEALAND ATHOEACOPHOKTD^. 323 



median groove, the renal opening in front of it. Anus on the right 

 side, close to the perinotum, in a triangle formed by the pre- and post- 

 anal grooves. Generative orifice on the outer side of the right tentacle. 

 Hyponotum broad, the perinotum thread-like. Sole aulacopod through 

 contraction in alcohol. Shell rudiments consisting of about a dozen 

 calcareous white grains of various sizes and shapes, the largest 

 about If mm. 



Measurements of a large spirit specimen : length over back from 

 head to tip of tail, 37 mm. ; width of back to perinotum, 9 mm. ; 

 sole — length 33, breadth 4 mm. ; breadth of hyponotum, 2-5 mm. ; 

 distance of anus from right tentacle, 7 mm. ; from pulmonary orifice, 

 4 mm.; pulmonary orifice from head, 10 mm.; generative pore from 

 pulmonary orifi.ce, 9 mm. 



Ut 



Jaw elasDiognathic. Radula with very numerous teeth, the central 

 tooth (Fig. 2, c.) with a larger median and six lateral denticles, three 

 on each. side. Lateral teeth (Fig. 2, lat.) with an inner large and six 

 outer smaller denticles. 



Reproductive organs (Fig. 3). The hermaphrodite gland is of 

 moderate size, brownish, the albumen gland rather large, smooth, 

 yellowish- white ; there are no accessory glands below it ; the prostate 

 above and the oviduct below are of nearly equal size, the latter is 

 prolonged into a somewhat convoluted free oviduct with a proximal 

 receptaculum seminis. The sheath of the male organ is not long, 



