l:'n/briu.\ GASTROPODA. 377 



Whorls 1. first slowly increasing, the last high, lightly convex, and 

 somewhat depressed below the suture ; base contracted. Suture 

 not much impressed. Aperture subvertical, narrowly ovate, chan- 

 nelled above, produced below into an oblique, moderately long, and 

 open canal, notched at the base. Outer liji convex, with a fairly 

 sharp edge, much thickened and dentate inside in quite adult speci- 

 mens. Colunielhi vertical, arcuate, with a few small tubercles below. 

 Inner lip narrow upon the pillar, extending over the parietal wall, 

 which has usually a distinct tubercle below the suture ; narrowed 

 below, and forming the inner margin of the canal, which is slightly 

 recurved. Fasciole distinct, slightly lamellate ; sometimes there is 

 a narrow groove between it and the inner lip. Operculum normal. 



Diameter, 1 1 mm. ; height, 24 mm. : angle of spire. 48-50. Dia- 

 meter, 15 mm. ; height, 29 mm. 



Dentition,. Troschel. Das Clebiss d. Schnecken, pi. 7, f. 12: Hutton, 

 T. N.Z.I., xiv, 162, pi. 6, f. D (as of E. Jwentu). 



Animal T.N.Z.I., xiii, 201. 



Tijpc in the British Museum. 



11 ab. North and .South Islands ; Chatham Islands ; Auckland 

 Islands. The type was collected in New Zealand by Earl. 



RciHfirks. This species also is very variable, some specimens 

 showing affinities with E. linea, others with E. vittata. The shells 

 from the Hauraki Gulf are mostly spirally distinctly ridged, and 

 the ridges much closer together, whilst those of the South Island are 

 generally smooth, with fine spiral threads only, and the spiral purple 

 bands further apart. 



Fossil in the Pliocene. 



Subsp. costulata, n. subsp. 



Distinguished from the species by having the spire-whorls, proto- 

 conch excepted. axially costate, the costa- sometimes extending over 

 the body- whorl as well ; they are broadly rounded, and their number 

 is about 18 on the penultimate whorl. Otherwise the subspecies does 

 not differ from the species. 



Tt/pe in my collection. 



ffftb. Great Barrier Island (type) ; Kenepuru Sound. 



4. Euthria Martensiana, Hutton. 1878. Plate 44, fig. 22. 



Enthria Mdrtf.nsianti, Hutt.. J. de Conch.. 1878, 16. Fusus liitorinoide-s, 

 Reeve : Hutton. C.M.M., 10 ; not of Reeve. Euthria Martensiana, 

 Hutt., M.N.Z.M., 52. Pisania Martensiana, Hutt., T.N.Z.I., xvi, 230. 

 Euthriii Miir/i Hxintiu, Hutt.: Tryon, Man. Conch. (1), iii. 1.~>1 ; Index. 

 73. 



Shell rather small, elongate, fusiform, very thin, with rather in- 

 conspicuous spiral sculpture, except upon the base. Sculpture con- 

 sisting of indistinct distant spiral ridges, with numerous fine spiral 



