Rhytidn.] <;. \STROPODA. 7 To 



tingled around the umbilical funnel. Suture impressed. Aperture 

 oblique, oblongly oval, within shining and bluish-white. Peristome 

 simple, margins closely united, superior portion somewhat depressed, 

 straight, bent backwards. Outer lip acutely and basal lip broadly 

 rounded. Columella very oblique, arcuate. Inner lip with a 

 moderate callus spreading over the basal lip, dilated and reflexed 

 above ; parietal wall with a very thin whitish and polished callus. 

 Umbilicus funicular, moderate, deep, gradate, sometimes chestnut- 

 coloured. 



Diameter Maj., 23-5 mm. ; min., 19 mm. : height, 12 mm. (type). 

 Diameter Maj., 33mm.; min., 26mm.: height, 18mm. (large 

 specimen). 



Dentition.- Hutton, T.N.Z.I., xvi, 167, pi. 10, f. P. 

 Anatomy. Collinge, A.M.N.H. (7), vii, 1901, 66, pi. 1, f. 1-16 : 

 Murdoch, P. Mai. S., iv. 1901, 166, pi. 17, f. 5. 6 ; I.e., v, 272. 



Radula having the formula 12 + 1 + 12, varying from 9 to 12 ; 

 the central tooth is sometimes wanting. Teeth robust, all aculeate, 

 smooth, increasing from the centre to the 9th or 10th, the outer one 

 or two much smaller. 



Alimentary Canal. The buccal mass is very large, and the mus- 

 cular attachments very strong. The oesophagus enters the dorsal 

 surface of the buccal cavity ; it is a long narrow tube, enlarging to a 

 wider cavity behind the salivary glands. These latter are 2 large 

 glands, fused together in the median line. The other portion of the 

 alimentary canal closely resembles that of Helix. 



Generative Organs. The generative orifices are distinct, the male 

 opening about 1 mm. in front of the female orifice, and they are about 

 11 mm. behind the right upper tentacle. Male organ with the re- 

 tractor muscle at its apex, a prolongation or epiphallus arises from 

 the posterior third ; between this point and the insertion of the re- 

 tractor muscle the verge appears folded upon itself ; the interior 

 walls of penis and epiphallus are studded with minute papillae. The 

 ovotestis small and imbedded in the liver, hermaphrodite duct closely 

 convoluted, albumen-gland large. The spermatheca subcylindrical in 

 its lower portion, thence somewhat contracted and twisted upon itself, 

 slightly enlarging above, and closely adhering to the uterus. 



Type in the British Museum. 



Hob. North Island : Whangaroa ; Kamo (C. Cooper) ; Auck- 

 land, type (Greenwood) ; Cuvier Island (Seymour) ; East Island 

 (Captain Bollons) ; Pukekohe (H. S.) ; Waikato (W. W. Smith) ; 

 Mount Pirongia (Urquhart) ; Gisborne ; Wainui, near Gisborne 

 (A. Hamilton) ; Cape Kidnappers ; Mangaone Cave, near Nuhaka 

 (H. Hill) ; Ruatoki, Tuhoe-land (E. Best) ; Wanganui (Drew) ; Levin 

 (R. Murdoch) ; Midhirst, Taranaki. Stephen Island (Captain Bollons). 

 South Island : Lake Guy on Run, Nelson. 



