211 



Cyprsea (TJmbilia) sphgerodoma, Tate. 



1890. Cyprcca sphmroiloma, Tate, Trans. Eoy. Soc. South Aust. vol. xiii. 



pt. 2, p. 209. 

 1892. Cijpraa sph<erodoma, Tate, id. vol. xiii. supp. pi. viii. fig. 5. 

 1896. Cyprcea sphcerodoma, Pritcliard, Proc. Eoy. Soc. Vict. vol. viii. n.s. 



p. 107. 



This species is closely allied to C. eximia, but is not so elougate, 

 the body-whorl being much more inflated, whilst the posterior 

 third of the aperture is strongly curved to the left. Another 

 point of difference is the mode of development of the columellar 

 lirae or sulcations : in C. eximia these are typically very close 

 together, and extend over a large portion of the ventral surface 

 of the body- whorl, especially towards the anterior ; whilst in 

 C sphmrodoma they are more like ridges, are shorter, broader, 

 farther apart, fewer in number, and do not extend over such 

 a wide area. 



This species forms a connecting link between C. eximia and the 

 living C. umhilicata, Sowerby, as the author indicates. 



Dtmensions. — Length 95 mm. ; breadth 52 mm. 



Form, and Loc. — Eocene : Victoria. 



70408. Example of a very globose variation, in which both 

 anterior and posterior canals are short, the latter being sharply 

 curved ; from Mount Martha. Purchased. 



G. 4303. Example of the adult; from Muddy Creek. 



Presented by John Bennant, Esq. 



G. 5476. Specimen of the neanic stage of growth ; from 

 Muddy Creek. Purchased. 



Cypraea, sp. 



The following specimens of Tertiary Cyprcea are not deter- 

 minable specifically ; they are all iu the state of casts. 



From South Australia — 



48803. Two examples of a very gibbose sjiecies allied to 

 C. leptorhyncha ; from the Iliver Murray cliffs. 



Presented by Commodore Goodenoujh, R.X. 



