38 SUBANTARCTlC ISLANDS OF NEW ZEALAND. [Mollusca. 



Diameter — Maj., 2-6 mm. ; min., 2-4 mm. Height, 1*4 mm. 



Type in the Canterbury Museum, Christchurch. 



H(d). — Auckhind Islands, several specimens found under logs (Professor Benham). 



This species is allied to such forms as E. cornicidum, E. sterkiana, E. eremita, and 

 E. brouni, but is distinct from all of them. 



It is with greatest pleasure that I am uniting the name of our distinguished 

 scientist Professor VV. B. Benham, D.Sc, F.R.S., with the species. 



Endodonta (Ptychodon) minuta, n. sp. (Plate I, fig. 15.) 



Shell minute, discoidal, thin and fragile, radially costate, umbilicated. Sculp- 

 ture consisting of fine, sharp, equidistant, and flexuous thread-like riblets, about 

 30 per millimeter, the interstices with fine growth-lines ; there is no spiral sculpture. 

 Colour yellowish-white, with distant narrow radial brown streaks, not extending 

 below the periphery on the last whorl. Epidermis thin, slightly shining. Spire 

 flat, not elevated above the last whorl. Protoconch flat, rather large, of IJ smooth 

 and lightly convex volutions. Whorls 3^, regularly increasing, moderately convex, 

 the last rounded at the periphery and base. Suture impressed. Aperture lunar, 

 oblique, much excavated by the parietal wall ; the outer wall with 8 long, thin, 

 spiral lamellae, the lowest two closer together, and the three uppermost incon- 

 spicuous ; no lamellae on the parietal wall and coluraellar lip. Peristome simple, 

 thin, sharp, regularly rounded. Columella short, vertical, arcuate, very little re- 

 flexed. Umbilicus wide, perspective, about a third of the greatest diameter. 



Diameter, 1-4 mm. ; height, 0*7 mm. 



Type in the Canterbury Museum, Christchurch. 



Hub. — Campbell Island, one specimen (W. K. Chambers). 



The specimen is not adult, and it is well possible that lamellae on the parietal 

 wall and columellar lip appear only at a later stage of growth. The numerous 

 slender lamellae on the outer wall induce me to class it for the present under 

 Ptychodon. 



Laoma (Phrixgnathus) campbellica (Filhol), 1880. 



Hdix campbellica, Filhol, Bull. Soc. Philomat., iv, 1880, p. 126 ; Miss. I.C, p. 570. 

 Microfhysa campbellica, Filhol : Hutton, T.N.Z.I., xvi, p. 195. 



^a6.— Campbell Island (Filhol). 

 I have not seen this species. 



Laoma (Phrixgnathus) cognata, n. sp. (Plate I, fig. 16.) 



Shell minute, conical, thin, finely costate, keeled, perforated. Sculpture con- 

 sisting of exceedingly fine, equal, flexuous, radiate riblets, about 50 per millimeter, 

 crossed by fine microscopic spiral striae. Colour yellowish-white, with radial broad 

 and regularly spaced streaks of fulvous ; base uniformly light brown. Epidermis 

 thin, not shining. Spire conical, with a blunt apex, about 1^ times the height of the 

 aperture ; outlines straight. Protoconch comparatively large, globose, of 1^ quite 

 smooth and strongly convex turns. Whorls 5, regularly increasing, convex, the last 

 sharply angled at the periphery ; base convex. Suture deep. Aperture transverse, 

 slightly oblique, subrhomboidal, not much excavated by the penultimate whorl. Peri- 



