Fossil Fauna, Table Cape Beds, Tasmania. 83 



11. Fusus johnstoni, T. Woods. 



F.JoImstoni, T. Woods, RR.S.Tas., 1876, p. 94. 

 F. johnstoni, Tate, Gast. I., 1888, p. 136, pi. xii., tig, -iij, 4^. 

 F Johnsioni, Johnston, Geo. Tas., 1888, p. 237, pi. xxix., fig. 9, 

 and pi. xxxi., figs. 7, 8, 10 and 17. 



12. Latipofusus cingulata, sp. nov. Plate II., tigs. 5 and 6. 



Shell elongate and narrowly fusiform, consisting of an obtuse 

 embryonic portion of about two-and-a-half smooth convex whorls, 

 the apex of which is central, succeeded by from six to eight 

 gradually increasing very slightly convex whorls. 



Apical angle from about twenty to twenty-tive degrees. The 

 smooth embryonic portion makes the apex of the shell obtuse, as 

 its whorls are shorter, more convex, and slightly wider than the 

 succeeding spire-whorl. Suture most distinct between the earlier 

 or posterior spire-whorls, becoming less marked anteriorly ; the 

 convexity of the whorls also slightly stronger posteriorly, with a 

 tendency to become flatter anteriorly, greatest convexity in the 

 anterior half of each whorl. Aperture oval, peristome much 

 thickened at the suture in adult specimens, outer lip with a thin, 

 sharp and crenulated outer edge, thickened and ridged internally, 

 about six well-defined widely sepai'ated internal ridges. Posterior 

 of the aperture slightly channelled, anterior prolonged into a long 

 narrow canal, which is a little more than one-third the length of 

 the shell. Colunaella long and straight, and furnished at the 

 anterior end of the aperture, just above the canal, with one strong 

 oblique plait. 



Surface ornamented with spiral threads crossed transversely 

 by costte, strise, and lines of growth. Of the spiral threads there 

 are four or sometimes five, which are strong, well-raised, and 

 convexly rounded, with a much finer intercalated thread between, 

 the latter, almost in some specimens and wholly in others, tilling 

 the intermediate space between the stronger spiral threads. The 

 transverse ornament crossing the spiral consists, first, of close, 

 regular, convexly-rounded costse, about eight in number on the 

 earlier or posterior whorls, increasing anteriorly to about fourteen 

 on the body-whorl. The costai are strongest about the middle of 

 each whorl, and fade away towards the posterior and anterior 



g2 



