112 SCAPHELLA. 



73227. A series exhibiting stages of growth ; from Schnapper 



Point. Purchased. 



G. 9352. Three specimens showing variation, in development 



of columellar plications ; from Muddy Creek. Purchased. 



Scaphella polita, Tate (sp.). 



1889. Valuta pohta, Tate, Trans. Eoy. Soc. South Aust. vol. xi. p. 127, 

 pi. ii. fig. 7. 



This is a close ally of S. maccoyi, from which it differs only in. 

 being proportionately broader, in having more ventricose whorls, 

 and by the protoconch being larger ; columellar plications typically 

 five, but sometimes six in number, the largest plait being placed 

 anteriorly. 



The protoconch (Plate IV. Figs, \5a-h) in general shape is 

 turbinate, and is distinctly scaphelloid. It consists of two turns, 

 the earlier portion of which is irregularly granular, and rises to an 

 obtuse point, the later portion being regular, deeply canaliculate, 

 and spirally and longitudinally lineate anteriorly. 



Dimensions. — Length 30 mm.; breadth 14 mm.; length of 

 aperture 19'5 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9355. Examples of the neanic and ephebic stages of growth. 



Purchased. 



Scaphella ancilloides, Tate (sp.). 



1889. Vohita ancilloides, Tate, Trans. Koy. Soc. South Aust. vol. xi. p. 126, 

 pi. iii. fig. 7. 



Spire composed of four slightly convex whorls ; in the young 

 stage these are obliquely ridged and furnished with spiral 

 lineations, both of which characters almost disappear as the 

 ephebic stage is attained. Body-whorl in the adult closely longi- 

 tudinally striated, and with obscure spiral lines ; suture incised ; 

 aperture large, contracted posteriorly, expanded anteriorly where 

 it is truncated and broadly channelled ; outer margin thick and 

 slightly sinuous, inner margin covered by effuse polished callus ; 

 columella with three plications which in the young are much 



