or NEW SOUTH WALES. 231 



Muller's Nassa incrassafa in form but smaller and coarser about 

 the mouth, and with a columellar tooth. N. incrassata belongs to 

 the Vienna miocene. It is also very near Deshayes N. truncata 

 of the Paris basin. 



Cancellaria varicifera. pi. 21, fig. 12. 



G. t. parva, ovata, spira elata, suhacutn, varicifera, solida, con- 

 cinne scidpta ; anfr. 5 {emhrij07i, 1| l(svib.), conoexis, longitudinal- 

 iter costatis, et liris regularibus, distantihus cancellatis, undique 

 prceterea longit. terme regulariter crebre siriatis ; costis valylis (uU. 

 anfr. 12), declivibus, undulosis, elevatis, conspicuis, acAitis ; liris 

 cegualibus distantibus, planatis, supra castas transeuntibus, sed non 

 nodosiSj sutura profunde impressa ; aperlura ovala, inius lirata, 

 antice canaliculata, labro tenui, columella regulariter triplicata ; 

 varicihus latis elevatis, rotundatis. Alt. 9, lat. 4|, long spiree 5. 



This shell does not appear to be uncommon at Muddy Creek. 

 In its style of ornamentation it is much like many Australian 

 forms, but we have no living species with varices. In this res- 

 pect it is very near G. Bellardi, Michellotti, of the Italian mio- 

 cene and Vienna basin (JDescrip. des Fossiles Miocene de Vltalie 

 sepient, p. 225) ; but in that species the plaits on the columella 

 are irregular. Our shell is smaller, thinner, less acute, and the 

 varix at the mouth is less pronounced. The longitudinal ribs 

 are numerous, acute, and somewhat undulating. Where they 

 are crossed by the lirae they are not nodose, and the lirae them- 

 selves are distinct, equal, flat, not nearly so conspicuous as the 

 ribs, and regular, only that sometimes there is a smaller one in 

 the interstices between the larger ones. Below the columella 

 the mouth is channelled and the throat is lirate. 



Cerithium cribarioides. pi. 20, fig. 14. 



G. t eleganter turritissima, nitente, gracili, anfr. 14, sensim, 

 accrescentibus, rotundatis, elegantissime clathratis, liris spiralibus 4, 

 liris longit. paviorib. supra spiral, iranseunt. et ibi nodosis ; nucleo? 

 (decoU.} sutura late impresssa, basi planata, spiraliter striata, uno 

 funiculo insignita, ad peripheriam angulata, ajpertura semilunaris 

 lahro tenuif cana.li contorto, recurvOo Alt. 19, lat. 4^, 



