OF NEW SOUTH WALES. 237 



insignitis ; ad peripheriam acutis ; hasi in medio conspicMc convexa, 

 tenuiter liraia ; umhilico costulis et liris granulosis in lineis 4 vel 5 

 marginata. Aperiura transversim ovata. Alt 1^, diarn. 6. 



This fossil is not very common. It is easily distinguished by 

 its very small size and depressed form and very acute periphery, 

 where the edge of the shell is produced into a sharp projecting 

 keel. The upper surface is distinctly lirate, and the edges of each 

 whorl margined with rather broad granular lines, two or three in 

 number, the central one where there are three, being much 

 smaller. The under side is abruptly convex in the middle, and 

 faintly lirate. The umbilicus is broadly margined with three to 

 five spiral lines of granules or riblets, varying in size and forming 

 a very elegant pattern. In the figure of this shell on Plate 21, 

 the side view and base with the umbilicus are represented. The 

 species is not like any existing or fossil, its nearest representative is 

 S. millegranum, Lamarck. Prof. Tate informs me that this 

 species reaches nine-tenths of an inch in diameter, and that then 

 the ornament is slightly difierent. 



Solarium Wannonensis. PI. 21, fig. 10. 



S.t. parva, discoidea, sup erne planata, infra pamni convexa, nitente; 

 anfr. 3|, undique striatis et granulosis, sed utrimque moniliferis. 

 Sutura canalicidaia ; hasi oblique transversim striata, umhilico 

 trihus lineis granulis majorihus circumornato. Apertura orhiculaia, 

 peristomate undulato, antice et postice alato. Diam. 3|, alt. 1. 



A small flat discoid shell with a canaliculate suture and the 

 whorls bordered at each side with a line of granules besides 

 being striate and granular throughout. The upper surface is 

 flat and the lower slightly convex with smaller granulations and 

 besides the spiral striae a very close series of oblique radiating 

 striae. The lip is undulating from the raised lirae of the whorls 

 being hollow underneath. The aperture is perfectly round, but 

 the peristome is spread at the columella above and below into a 

 kind of aliform expansion. The umbilicus is margined with three 

 rows of large granules and is channelled inside each whorl. 

 The species is very like S. canaliculatum of Lamarck only much 

 smaller. 



