252 CALTPTR^A. 



Dimennons. — Height 8".5 mm. ; breadth 15-5 mm. 

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



G. 9392. Examples of the neanic and ephebic stages of growth. 



Purchased. 



Calyptrsea (Calyptropsis) umbilicata, Johnston (sp.). 



1885. Crepidula umbilicata, Johnston, Pap. Eoy. Soc. Tas. 1884, p. 232 



(two figs.). 

 1888. Crepidida umbilicata, Johnston, Geol. Tasmania, pi. xxxii. fig. 10. 



1893. Calyptrma {Calyptropsis) umbilicata, Tate, Trans. Eoy. Soc. South 



Axist. vol. xvii. pt. 2, p. 333. 



1894. Calyptropsis umbilicata, Tate, Joiirn. Eoy. Soc. N.S.W. vol. xxvii. 



p. 181. 



1895. Calyptropsis umbilicata, Pritchard, Proc. Eoy. Soc. Vict. vol. viii. 



N.s. p. 146. 



This differs from C. turlinata principally, in that the protoconch 

 is more laterally situated, the shell increases in size more rapidly ; 

 the surface is prominently ornamented by a few distant spiral 

 ridges crossed by lamellae of growth and fine striae ; internal plate 

 small, surface covered by striae radiating from the rather large 

 umbilicus. 



Dimensions. — Height 4'5 mm. ; breadth 14 mm. 



Form, and Loc. — Eocene : Table Cape, Tasmania. 



G. 9393. An example of the neanic stage of growth. Purchased. 



Calyptraea (Calyptropsis) calyptrseformis, Lamarck. 



1822. Calyptrcea calyptrafonnis, Lamarck, Hist. Nat. Anim. sans Vert. 



t. vii. p. 12. 

 1834. Crepidula maculata, Quoy and Gaimard, Voy. de I'Astrolabe, Zool. 



t. iii. p. 422, pi. Ixxii. figs. 6, 9. 

 1859. Trochita maculata, Eeeve, Conch. Icon. vol. xi. fig. 15. 

 1873. Trochita maculata, Von Martens, List. Moll. N.Z. p. 28. 

 1873. Calyptrcea maculnta, Hutton, Cat. Marine Moll. N.Z. p. 31. 

 1873. Calyplraa maculata, Hutton, Cat. Tert. Moll. N.Z. p. 13. 

 1880. Trochita novm zealandicB, Hutton, Man. N.Z. Moll. p. 86. 

 1886. Calyptrcea [Siyapatella) calyptr<eformis, Tryon, Manual of Conchology, 



vol. viii. p. 122, pi. xxxv. figs. 96-9. 

 1893. Calyptrcea calyptrceformis, Hutton, Linn. Soc. N.S.W., Macleay 



Mem. Vol. p. 61. 



