163 



2. Leucozonia staminea, spec. nov. PL ix., fig. 13. 



Shell small, ovately globose, apex a little eccentric, mamil- 

 late of one and a lialf whorls, flattened down at tlie tip. 

 "Whorls below the apex four ; ornamented with distant, slender 

 spiral threads, the interspaces about 1 mill, wide on the body 

 whorl, occupied by close fine stride ; a few of the lir^e towards 

 ■the base are irregularly granulated. Aperture oval; outer lip 

 thin, lirate within ; columella with three close, equal, slightly 

 oblique plaits at the front, each ending in a tooth-like projec- 

 tion, a narrow umbilical chink behind the pillar ; canal short, 

 bent to the left, and reverted. 



Length, 12 ; breadth, 7'5 ; length of aperture and canal, 8. 



Locality, — Blue clays at Schnapper Point. 



3. Leucozonia tumida, spec. nov. PI. xiii., fig. 2. 



Shell small (immature?), globosely turbinate, ventricose; 

 apex mamillate of two subglobose whorls ; whorls four in all; 

 last whorl ventricose, with equidistant angular threads, finely 

 cancellated in the furrows by two or three spiral threadlets 

 and transverse striae. 



Outer lip faintly lirate within ; three nearly equal sized 

 plaits at the fore part of the columella ; canal short, much 

 -twisted, and reverted. 



Length, 10'5 ; breadth, 7'5 ; length of aperture and canal, 8. 



Locality. — Lower beds at Muddy Creek. {J. Lennant !). 



Genus Zemiea. 

 1. Zemira praecursoria, spec. nov. Plate xi., fig. 5. 



Shell ovate, stout ; whorls five and a half, ending in a smooth 

 mamillate apex, rounded, deeply channelled at the suture ; 

 sculptured w4th revolving incised lines (about ten on the 

 penultimate whorl), the posterior of which are more prominent; 

 whole surface slightly wrinkled and striated transversely. 



Last whorl with a revolving channel in an alignment with 

 the posterior angle of the aperture, and terminating at the 

 anterior third of the outer lip in a tooth-like projection ; in 

 front of the channel are six prominent, rounded, spiral ribs 

 much wider than the interspaces, whilst the posterior area is 

 sculptured as the penultimate v/horl. 



Aperture ovate, slightly angulated posteriorly ; inner lip 

 with a slight callous extension, partially concealing the narrow 

 umbilicus, which is margined by a strong, rounded, striated 

 rib ; columella smooth, compressed, terminating in a transverse 

 tooth -like fold ; anterior canal reduced to a mere notch ; outer 

 lip thin, the part anterior to the tooth-like projection is 

 crenately wrinkled. 



