164 



Length, 21 ; breadth, 13 ; length o£ aperture, 14. 



Localif}/. — Lower beds at Muddy Creek (J". DennantV). 



The discovery of a fossil species of Zemira is of interest 

 from the circumstance that the genus has hitherto been known 

 by one species, Z. aiistralis, Sow., inhabiting the temperate sea» 

 of Eastern Australia, from which it differs by its longer spire 

 and narrower body whorl, narrower sutural sulcus, and by the 

 more pronounced encircling ridges. 



Gexus Pisania. 



stiiopsis of species. 

 Turriculate, slenderly cancellate, canal long. 



1. P. rostrata. 

 Ovate-fusiform, coarsely .cancellate, whorls convex. 



2. P. semicosfata^ 

 thick oblique cost?e, whorls convex. 



3. P. obliqiiecostata ^ 

 whorls bicarinate, cancellated. 



4 . P . ^ urp u ro ides . 

 Ovate-conical, stronglj^ costated and lirate, margined at the 



suture. 5. P. hrevis^ 



1. Pisania rostrata, spec. nov. Plate x., fig. 10. 



Shell elongate-ovate, fusiform, with a high conical spire, 

 abruptly attenuated at the base into a stout beak (long for the 

 genus). Apex very small of two rounded whorls, the tip 

 obliquely depressed. Whorls below the apex six, convex, 

 spirally lirate with depressed rounded threads alternately 

 large and small (about 20 on the penultimate whorl) ; posterior 

 ■whorls with crowded slender costae, about 24 on the ante> 

 penultimate whorl, which vanish at the penultimate whorl. 

 Last whorl varicosely dilated behind the aperture ; base 

 rounded, rather sharply contracted into a broad, slightly 

 oblique, much-upturned beak. 



Aperture oval-oblong ; outer lip with a thin margin, strongly 

 ridged within ; inner lip with a circumscribed callous cover 

 continued down the pillar, behind which is a shallow narrow 

 groove ; a bifid callosity on the body wall near the posterior 

 angle of the aperture ; a strong oblique plait ends in a blunt 

 tooth-like projection at the top of the canal. 



Length, 25 ; breadth, 10 ; length of aperture, S ; of canal, 5. 



Locality. — Upper beds at Muddy Creek (J". Bennant !) 



This species is conspicuous amongst living congeners by its 

 abruptly contracted base and long beak. 



2. Pisania semicostata, spec. nov. Plate iv., fig. 9. 

 Shell oblonoj-fusiform, similar to P. rostrata, with more 



