253 



DESCRIPTIONS OF NEW SPECIES AND SUBSPECIES OF 

 NEW ZEALAND MOLLUSCA, WITH NOTES ON A FEW SPECIES. 



By Henky Sutee. 



Eead 8ih January, 1909. 



PLATE XI. 



E,issoiNA zoNATA, n.sp. PI. XI, Fig. 1. 



Shell rather large, oblong, imperforate, indistinctlj^ axially costate 

 and minutely spirally lirate, body- whorl usually with a brown zone. 

 Sculpture consisting of somewhat indistinct axial riblets, about fourteen 

 on a whorl, and very fine microscopic spiral striae. Colour white, 

 usually with a chestnut spiral band, beginning narrowly on the pen- 

 ultimate whorl above the suture, and broadening very rapidly on the 

 body-whorl, but leaving the base white. Spire high, about twice the 

 height of the aperture ; outlines somewhat convex. Protoconch with 

 a flat nucleus. Whorls about 7, very lightly convex and somewhat 

 flattened below the suture ; base flattish. Suture not much impressed. 

 Aperture oblique, semicircular, angled above, channelled below. Outer 

 and basal lip regularly arched, thick, with a rounded edge. Columella 

 very short, slightly twisted and turned to the left, forming a distinct 

 short channel with the slightly effuse basal lip ; inner lip very thick, 

 connecting the margins over the slightly excavated parietal wall. 

 Operculum unknown. 



Diam. 4*5, height ITS mm. Type. 

 „ 5 „ 10-5 „ 



Mab. — Bay of Islands (Mr. J. C. Anderson). 



All the specimens at my disposal are beach -worn, and the axial 

 sculpture is mostly effaced. Type in my collection. 



Skenella Pfefferi, n.sp. PI. XI, Fig. 2. 



Shell minute, globosely depressed, thin, pellucid, smooth, shining, 

 umbilicated. There is no sculpture. The colour is amber on the first 

 two whorls, light horn on the last. Epidermis very thin, yellowish, 

 slightly polished. Spire conoidal, very low, convex, its height about 

 one-third that of the aperture. Protoconch flatly convex, rather large. 

 Whorls 2f to 3, rapidly increasing, convex, the last not descending, 

 ample, with a regularly rounded periphery; base flattish, angled 

 around the umbilicus. Suture deep. Aperture large, subcircular. 

 Peristome convex, sharp, thin. Columella vertical, lightly arcuate ; 

 inner lip slightly callous and reflexed, spreading as a distinct callosity 

 over the convex parietal wall. Umbilicus open, about one-sixth of 

 the diameter. Operculum thin, almost colourless, sub-spiral, excentric, 

 the nucleus near the margin, with an elongated, subvertical inner 

 process. Diam. "8, height '45 millim. 



H^ab. — Te Onepoto, near Lyttelton ; type (H. S.). Lyall Bay 

 (Miss Mestayer). 



