PETTERD : ON TASMANIAN MARINE SHELLS. I03 



striate; spire obtuse; apical whorls smooth: suture impressed; 

 aperture elongately ovate, half the length of the shell; labrum 

 thickened ; sinus inconspicuous. 



Long. 13, lat. 5 mil. 



Habitat — King's Island, Bass Straits. 



A shell with much the appearance of D. Varix, T. 

 Woods, but much more narrow and fusiform; the aperture 

 is also shorter, and the body-whorl is faintly tuberculate at 

 the suture. 



Cythara l\(^acCoyi, n. sp. 



Shell fusiformly turretted, whitish; spire same length as 

 aperture ; whorls 6-i, convex, somewhat inflated; elegantly 

 ribbed, becoming gradually obsolete at the base and trans- 

 versely Urate; lira broad, flatly rounded, equalling the inter- 

 stices passing over the ribs; aperture ovate, outer lip thin. 



Long. 10, lat. 4| mil. 



Habitat — Brown River. 



Allied to C. tasnianica of Tennison Woods^ but more 

 inflated and with the ribs lirate. 



Gibbula tasmanica, n. sp. 



Shell turbinately conical, perforate, greenish white; spire 

 small; whorls 4-^, bluntly angled at the periphery, base 

 rounded, girdled with regular rounded fine Xwst above and 

 below; aperture rounded, joined by a thin callus, interior 

 iridescent with red and gxeen. 



Long. 6, lat. %\ mil. 



Habitat — Brown River. 



A single specimen obtained in the dredge at 5 fathoms. 

 Its nearest approach is C. aurea, T. Woods, but from which 

 it may be easily known by attending to diagnosis as given 

 above. 



