LOWER CRETACEOUS FOSSILS — ETHERIDGE. 327 



Obs. — The imperfect shell figured by Mr. Hudleston from South 

 Australia, and to which I applied the name of Cytherea moorei 

 is the only described bivahe with any relation to the present 

 form. There are numerous specimens in the collection, smaller 

 certainly than tliat represented by Hudleston's figure, but not 

 otherwise sufficiently differentiated to warrant separation. 



I know not what to make of Astwte ivollnmbillaeusis, Moore, ^* 

 the figure portrays so imperfect a specimen, but the sculpture is 

 certainly like that of the present fossils. 



GASTEROPODA. 



Genus Cancellaria, Lamarck, 1 799. 



(Mem. Soc. Hist. Nat. Paris, 1799). 



Cancellaria (1) terrareginensis, sp. tun: 



(Plate Ix., fig. 11). 



S'p. Char. — Sliell small, ventricose-turbinate, whorls four, sharply 

 differentiated from one another in size, and all more or less 

 shoulder-like around the sutures. Body whorl ventricose, greatly 

 exceeding the penultimate whorl in size, and rendered [quinqu]- 

 angular by several [five] transverse keels, crossed by prominent 

 equidistant cost^e extending from tlie suture across the two first 

 keels only, or perhaps nearly as far as the third ; antepenultimate 

 whorl with certainly three and perhaps four keels. 



Obs. — The mouth is unknown to me and the tentati\'e reference 

 to CanceUaria is based only on form and sculpture. 



I have already described''' the body whorl of a univalve 

 ( Delphhuda (?) stnrti) from the Lower Cretaceous of South 

 Australia with distant spiral keels, but without longitudinal 

 costje forming a kind of coronation ; the actual relation of the two 

 has yet to be shown. 



Genus Vanikoropsis, Meek, 1876. 



(Report U.S. Geol. Survey Territories (Hayden's), ix., 1876,p. 351). 



Vanikoropsis (?) stuarti, Eth. Jil 



(Plate Ixii., figs. 9-13). 



Vanikoropsis (?) Stuarti, Eth. fil., Mem. R. Soc. S. Austr , ii. 1, 

 1902, p. 42, pi. vi., f. 18-20. 



1"* Moore — Quart. Joiirn. Greol. Soc, xxvi., 1870, p 230, pi. xii., f. 12. 



19 Ethericlge— Mem. R. Soc. S. Aus^tr., ii., 1, 1902, p. 41, pi. vi., l". 21 ami 22. 



