OF NEW SOUTH WALES, 239 



mella lamellosa, expansa, conspicue concava, radiatim sulcata, postice 

 vejlexa, umbilico parvo formanti. Diara. 9|, alt. 8, long, apert. 

 6i, lab. 5i. 



A turbinate thin shell, opaque and not shining, with \\ rapidly 

 increasing whorls which are slightly corrugated here and there and 

 finely striate with the lines of growth, apex exsert, aperture sub- 

 orbiculate, labrum thin and extended, columella lamellose, ex- 

 panded, conspicuously concave, radiately sulcate, refiexed poste- 

 riorly so as to give rise to a narrow umbilicus above. 



This Trocliita seems very distinct from every fossil form 

 because of its few rounded turbinate whorls. It is quite different 

 from our Australian species, which is depressed. Ifc occurs at 

 Table Cape as well as the Muddy Creek. 



TORNATINA INVOLDTA. PI. 21, fig. 4, 



The specimen figured, which was the only one I have seen, has 

 been crushed by accident since the drawing was made, so that I 

 am unable to furnish any details, except that which the figure 

 affords. 



Leda inconspicua, Reeve. Plate 21, fig. 3. 



This shell is described by Reeve as from Australia, but I am 

 not acquainted with it from anything but his description and 

 figure. It is not known to collectors in New South Wales, Tas- 

 mania, or New Zealand. The fossil form corresponds so exactly 

 with Reeve's species that I cannot separate them. Prof. Tate 

 thinks the species cannot be distinguished from L, crehrecostaia, 

 described by me in Proc. Roy. Soc. Tasmania, 1876, p. 112. 



Leda Hottonii. Plate 21, fig. 2. 



L. t. parva, depressa, tenui, fragili, polila, transversim elongato 

 pi/riformi, concentrice rugose irregulariti r striata et late sulcata^ 

 latere postico valde products, et parum oblique tru7icato, angulato, 

 angtdo ohtuso, area postarigulari sulcata ; latere antico brevi, roturi' 

 daio, dentibus num,erosis acute aiigidatis. 



The peculiar feature of this fossil is the length to which the 

 posterior side is produced and its very slightly oblique obtuse 

 end. The concentric striaa are irregular and appear to be 



