286 PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



DESCRIPTIONS OF A NEW VARIETY AND FIVE NEW SPECIES 

 OF NEW ZEALAND LAND MOLLUSCA. 



By Henet Sittee. 



Bead IQth March, 1899. 



PLATE XV. 



1. Endodonta (Chaeopa) Oxagoensis, n.sp. PI. XV, Fig. 1. 



Shell small, discoidal, broadly umbilicated, fragile, semi-transparent, 

 ribbed, not sbining, yellowish -white with irregular reddish -brown 

 streaks, forming mostly zigzag lines ; spire flat ; whorls 5, the first 

 three very slowly, the others more rapidly increasing, convex ; the 

 protoconch of 1| volutions, whitish, microscopically striate, the other 

 whorls with equidistant, rounded, oblique riblets, about 11 per millim., 

 the interstices with microscopic lines of growth, no spiral striae ; 

 suture deep, periphery rounded; aperture oblique, rotundly lunar, 

 extremities converging, peristome thin, upper margin rapidly ad- 

 vancing, then turning down with a slight concave sinuation, columellar 

 lip regularly arched, callous, and very little expanded towards the 

 umbilicus, which is broad and perspective, about i of the greatest 

 diameter ; base convex. Diam. maj. 6, min. 5-25 mm. ; alt. 2*5 mm. ; 

 diam. of umbilicus 2 mm. 



B'ai. — In the native bush near Dunedin, under pieces of rotten 

 wood. (H. S.) 



Type in my collection. 



^. Otagoensis is nearest allied to E. tapirina, Hutton, and E. Colensoi, 

 mihi, but it is larger, and the riblets are more numerous than in both 

 the species mentioned. E. tapirina has about 9 riblets per mm. ; 

 which are sharp, elevated, every third or fourth riblet being higher 

 than the others, a peculiarity which is characteristic of the species ; 

 it is also non-decussate. E. Colensoi has 8 to 9 riblets per mm., and 

 the interstices are microscopically decussate. 



2. Endodonta (Chaeopa) subinfecta, n.sp. PI. XV, Fig. 2. 



Shell very small, subdiscoidal, broadly umbilicated, thin, semi- 

 transparent, ribbed, not shining, yellowish-white with rufous patches 

 above, forming indistinct zigzag bands towards the base ; spire almost 

 flat; whorls 5, the first three very narrow, the others more rapidly 

 increasing, the last slightly descending in fi'ont, convex ; the white 

 protoconch formed by H whorls, which are microscopically striate, 

 the other whorls are adorned with equidistant, oblique, sharp, and 

 rather elevated riblets, about 8 per millim., the interstices micro- 

 soopically decussate ; suture deep ; periphery rounded ; aperture 



