Lngnchilus.'] GASTROPODA. 179 



Diameter, 4-5 mm. ; height, 5 mm. 



Dentition unknown. 



Type in my collection. 



Hab. Kaino, North Island, type (C. Cooper). 



2. Lagochilus calvum, Hutton, 1883. Plate 35, fig. 1. 



Leptopomn calva, Hutt., T.N.Z.I., xv, 1882 (1883), 140. Lmjochilus calvum, 

 Hutt. : Hedley and Suter, P.L.S. N.S.W. (2), vii, 621 ; Suter, J. de 

 Conch., xli, 224. 



Shell conical, perforate, brown, periphery rounded. Sculpture con- 

 sisting simply of numerous fine oblique growth-lines. Colour reddish- 

 brown, with a narrow spiral pale band below the periphery. Spire 

 acutely conical, muc'h higher than the aperture. Whorls 6|, rather 

 flattened, the last subangled at the periphery ; base convex. Suture 

 impressed. Aperture oblique, roundly ovate. Peristome sharp, regu- 

 larly rounded. Columella subvertical, arcuate. Perforation narrow, 

 but open. Operculum horny, thin, transparent, of about 5 gradually 

 enlarging whorls ; nucleus subcentral. 



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



Dentition resembling that of L. pannosum (Hutton). 



Type in the Canterbury Museum, Christchurch. 



Hob. Greymouth (R. Helms). 



Remarks. The only specimen I have ever seen is the type. The 

 species would seem to be rare, and local in distribution. 



3. Lagochilus Chiltoni, Suter, 1896. Plate 10, fig. 1. 



Lagochilus Chiltoni, Suter, P. Mai. S., ii, 33, pi. 4, f. 1. 



Shell very small, turbinate, subperforate, rufous, slightly glossy, 

 semitransparent. Sculpture consisting of nearly equidistant, rather 

 close, radiate, and partly membranaceous riblets, about 5 to 6 per 

 millimetre on the last whorl ; the whole surface faintly microscopically 

 spirally striate. Colour uniformly rufous. Epidermis thin and horny, 

 easily worn off. Spire conical, apex rather pointed, higher than the 

 aperture. Protoconch small, papillate, shining, of 2 convex whorls, 

 faintly spirally striate, the second reticulated bv additional close 



/ JL >/ */ 



radiate striae. Whorls 5, c-onvex, the first 3 slowly, the others more 

 rapidly increasing, the last rounded at the periphery ; base convex. 

 Suture impressed. Aperture slightly oblique, subcircular. Peristome 

 simple, straight, notch at the suture very slightly indicated. Colu- 

 mella arcuate, slightly callous, expanded and completely covering the 

 small umbilicus. Operculum not known. 



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



Dentition unknown. 



Type in my collection. 



Hab. Fern Flat, Buller River, South Island, type (Dr. Chilton) ; 

 Wairangi, Waikato (A. Suter). 



Remark. The specimen from the latter locality is slightly more 

 slender, and darker in colour. 



