320 CYLICHNA. 



heavily calloused and slightly tortuous ; parietal wall lightly cal- 

 loused. Alt. 7, diam. 3 mill. 



Auckland, New Zealand (Hutton, Wright). 



Cylichna striata HUTTON, Cat. Mar. Moll. N. Z. p. 52 ; Manual 

 N. Z. Moll. p. 120. C. arachis HUTTON, The Pliocene Moll. N. Z. 

 p. 37. 



The above description and the figures are drawn from Auckland 

 specimens sent by Mr. G. W. Wright. They seem to differ from 

 C. arachis in the narrower apical umbilicus. Button's description 

 of 0. striata is as follows : " Small, smooth, white, longitudinally 

 finely striated ; aperture scarcely produced above the spire. Length 

 *1, breath *05 inch." This would indicate a much smaller form 

 than mine, which may prove distinct. 



C. ZEALA.NDICA Kirk. Unfigured. 



Shell white, strong, smooth, faintly longitudinally striated. Aper- 

 ture produced above the spire. Alt. '35 inch (Kirk). 



Waikanae, New Zealand. 



Cylichna zealandica KIRK, Ann. Mag. N. H. (5), vi, p. 15 ; 

 Trans. N. Z. Inst. xii, p. 307. 



Compare C. striata. 



C. TAHITENSIS Watson. PI. 30, fig. 10. 



Shell cylindrical, thin, glassy, spirally striate from end to end, 

 with a small body, rounded outlines, no depression nor central point 

 at the apex, and a toothless but abruptly truncated and prominent 

 pointed pillar. Sculpture : Longitudinals there are scarcely per- 

 ceptible lines of growth. Spirals the whole surface is covered 

 with fine grooves, not quite regular, about ufa inch apart, but 

 weaker and more crowded in the middle than at either extremity. 

 Color bluish transparent glossy white. Mouth rather large and 

 long. Outer lip has a sinus just above the body, rises and is angu- 

 lated at the outer upper corner of the shell ; from this point its 

 edge advances and its line is slightly convex, tending in front to be- 

 come straight ; at the lower outer corner it is angulated, and across 

 the base is abruptly truncate. Inner lip has a very thin glaze, it is 

 flatly convex on the body, straight and elongately oblique on the 

 pillar, which presents no tooth, but has a thin, defined, hardly 

 twisted edge, and is abruptly cut off in front, being there a strong 



