Lagochilus.] GASTROPODA. 183 



the umbilicus, but not keeled. Suture impressed. Aperture slightly 

 oblique, subcircular, angled above. Peristome thin, regularly arched, 

 callous within, continuous over the parietal wall ; notch at the suture 

 biit slight. Columella arcuate, subvertical, with a white inner callus, 

 slightly expanded over the umbilicus, which is narrow and deep. 

 Op&rculum thin, horny, with about 5 whorls ; nucleus subcentral. 



Diameter, 3-25 mm. ; height, 5 mm. 



Dentition unknown . 



Type in the Canterbury Museum. Christchurch. 



Hab. North Island only : Te Reinga ; Tom Bowline's Bay ; Wha- 

 ngaroa (C. Cooper) ; Kaihu, Hokianga ; Waitakerei Range (H. S.) ; 

 Waiwera ; Birkenhead ; Mount Pirongia. The type is from " Auck- 

 land," exact locality not stated (T. F. Cheeseman). 



Var. albida, an almost colourless, translucent specimen from Broad- 

 wood, Hokianga, is in my collection. 



9. Lagochilus pannosum, Hutton, 1883. Plate 35, fig. 7. 



Leptopoma pannosa, Hutt, T.N.Z.T., xv. 1882 (1883), 140. Lagochilus 

 pannosum, Hutt. : Hedley and Suter, P.L.S. N.S.W. (2), vii, 621 : Siiter, 

 J. de Conch., xli, 224. 



Shell conical, angled at periphery, perforate, brown, covered with 

 a dark-fuscous, ragged epidermis. Sculpture consisting of oblique, 

 very irregular, radiate, and rather distant plaits, produced into tri- 

 angular membranaceous processes at and sometimes below the peri- 

 phery ; base with fine radiate threads crossed by fine spiral striae, 

 which, however, are mostly subobsolete. Colour uniformly brown. 

 Epidermis thin, processes easily worn oft", dull. Spire acutely conical, 

 very little higher than the aperture. Protoconch small, papillate, of 

 2 smooth, strongly convex, and dark-brown shining whorls. Whorls 6, 

 rather flattened, the last angled at the periphery ; base flattish. Suture 

 impressed. Aperture rather oblique, broadly ovate. Peristome thin, 

 regularly arched, or slightly angulated at the periphery, very little 

 callous inside ; very slightly patulous. Columella slightly oblique, 

 arcuate, callous inside, and slightly expanded toward the narrow but 

 open perforation ; there is no parietal callosity. Opi-rculum horny, 

 of 5 whorls ; nucleus subcentral. 



Diameter, 2-75 mm. ; height, 3-25 mm. 



Animal. Rostrum emarginate ; tentacles short, slightly tapered, 

 and rounded at the ends ; the eyes on slight bulgings at their bases ; 

 foot short, not produced much beyond the operculum ; tail rounded. 

 Body and foot brown ; tentacles and a band on each side of the head 

 purple ; rostrum broadly margined with white, and the tentacles 

 minutely tipped with the same colour. (Hutton.) 



Dentition. Hutton. T.N.Z.I., xvi, 173, pi. 10. f. U. 



Tt/pe in the Canterbury Museum, Christchurch. 



Hab. Greymouth (R. Helms). 



