Fossil Fauna, Table Cape Beds, Tasmania. 109 



Observations. — The Rev. J. E. Tenison Woods' description of 

 this species is somewhat vague and difficult to grasp exactly, but 

 I think that the present form represents his species; the speciniens 

 before me are however much larger than those indicated by his 

 dimensions, having a length of 77 mm.; breadth, 22 mm.; length 

 of aperture, 41 mm.; breadth of aperture, 9 mm. 



59. Pleupotoma wynyardensis, sp. nov. Plate II., 

 tigs. 12 and 13. 



Shell of small to medium size, somewhat narrow elongate- 

 fusiform, aperture and canal about the same length as the spire ; 

 spire acute, made up of a rather small embryonic portion, 

 succeeded by numerous, gradually increasing, convex, and more 

 or less strongly costated whorls. Apical angle about twenty-five 

 to thirty degrees. Embryo rather small, consisting of about one- 

 and-a-half smooth convex whorls. Spire consisting of seven or 

 eight regularly convex whorls, with their greatest convexity 

 about the middle of each whorl, and with a well-impressed suture. 

 Aperture oval ; outer lip rather thin and smooth internally, with 

 a well-defined broad but comparatively shallow sinus just below 

 the suture, from the sinus the lip projects slightly forward with 

 a regular convex arch, then curving downwards to join the 

 anterior canal. Sinus about one to one-and-a-half millimetre 

 broad, but usually only about half this measurement in depth. 

 At the anterior end the aperture opens into a long, straight, 

 slender and open canal, which is much longer tlian the aperture. 

 Inner lip with a thin enamel coating. Columella simple and 

 smooth, straight, slender, and gently tapering to the anterior end. 

 Surface ornamented with oblique costfe, which are most highly 

 elevated about the middle of each whorl, and fade oft' more rapidly 

 towards the posterior suture than the anterior. Costal usually 

 nine to a whorl, an occasional example shows as many as eleven 

 or twelve on the body-whorl. Strength of development of costie 

 somewhat variable, especially on the anterior whorls, where they 

 are occasionally only just visible. The costte are traversed by 

 comparatively coarse and fine spiral threads. Of these there are 

 four to six coarser and more prominent than the rest, situated in 

 the anterior two-thirds of each whorl, especially prominent where 

 they cross the costse, more numerous, amounting to about eight or 

 nine, on the body-whorl, with much broader interspaces between 



