798 GASTROPODA. [l> nlwonata. 



mantle-area, with a distinct median groove. Lateral grooves numbering 

 about 15 on each side, 8 of which are post-pallial ; towards the margins 

 they are bi- or tri-furcating. Mantle-area narrowly triangular, some- 

 times quadrangular, granulose ; the respiratory orifice in the middle; 

 the renal opening small, in the front angle on the median groove ; both 

 orifices of a lighter colour. Anus below and a little in front of the 

 respiratory orifice, a short distance above the perinotum. Hyponotum 

 broad and very distinct, the lateral grooves passing over it. Perinotum 

 sharply raised. Sole broad, smooth, with a lighter median band, and 

 separated by a thread-like line from the hyponotum. Eudimentary 

 shell consisting of calcareous white grains. 



The measurements of the type specimen are : Length over back 

 fiom head to tip of tail, 50mm. Width of back, 23mm. Sole- 

 Length, 40mm.: breadth, llmm. Breadth of hyponotum, 4mm. 

 Distance of anus from right tentacle, 12mm. Distance of anus from 

 pulmonary orifice, 9 mm. Distance of anus from perinotum, !-5 mm. 

 Distance of pulmonary orifice from head, 18 mm. 



The elasmognathic jaw has the usual form. 



Teeth of radula very numerous, the central tooth very slender, 

 with a small, sometimes irregularly shaped cusp, bearing a single blunt 

 denticle, usually on the left side. * Lateral teeth with a long and stout 

 inner denticle, and 3 smaller outer ones. Digestive system similar to 

 that of A. papillatus. 



The reproductive organs, which open close behind the right tentacle, 

 have no prostata visible and no spermoviduct, but 2 accessory glands, 

 a smaller bulbose gland below the large elongated albumen-gland, and 

 ti. large convoluted glomerate gland ; the receptaculum seminis is 

 inserted distally on the vagina ; the intromittant organ with numerous 

 dense papillae. 



Type in my collection. 



M>. South Island : Spring-burn, Mount Somers (Professor Dendy) ; 

 slopes of Ben More, in Fngns forest (Dr. Hilgendorf). 



4. Athoracophorus Huttoni, Suter, 1909. Plate 31, fig. 7. 



Athomcophorus (Pseudaneitea) Huttoni, Suter, Subantarct. Islds. N.Zeal., i, 



1909, 39, pi. 1, f. 17-19 : P. Mai. S., viii, 324. 



Animal (in alcohol) rather small, back rounded, tail tapering to a 

 rather sharp point ; yellowish, with 4 rows of black spots on the 

 uotum, the median part usually of darker colour, with numerous pro- 

 minent papillae, the head-shield with a median groove ; anal orifice 

 near the perinotum. The ground-colour is a light yellow, very likely 

 amber when alive ; on the notum there are 2 rows of dark -brown or 

 blackish spots on each side from the median line, the inner row of 

 larger and often coalescing spots, the outer row formed by smaller 

 and but rarely confluent specks ; the broad median area between 

 the two inner rows is usually of a darker colour, but the mantle-area, 



