256 



Natica hamiltonensis, Tate. 



1879. Natica wintlei var. hamiUoneiisis, Tenison-Woods, Proc. Linn. Soc. 



N.S.W. vol. iii. p. 229, pi. xxi. fig. 8. 

 1893. Natica hamiltonensis, Tate, Trans. Roy. Soc. South Aust. vol. xvii. 



pt. 2, p. 319, pi. X. flg. 6. 



Shell globose ; spire somewhat elevated, suture clear, accom- 

 panied by a depression ; aperture broad, rounded in front, angulate 

 behind ; outer margin thin ; inner margin covered partially by 

 enamel, but there is no posterior callosity ; umbilicus semilunate, 

 funiculus broad, the outer portion conterminous with the columellar 

 border, slightly overhanging, defined in front by a narrow sulcus. 



Immature specimens resemble N. caillati, Deshayes, of the 

 European Eocene ; but the aperture of the Australian species is 

 broader, whilst the excavation behind the funiculus is charac- 

 teristic, and the spire is not so much elevated. 



Dimensions. — Length 20 mm.; breadth 18 mm.; length of 

 aperture 15 mm. 



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



G. 9410. Series illustrating stages of growth. Purchased. 



Natica subnose, Tate. 



1893. Natica subnoa, Tate, Trans. Eoy. Soc. South Aust. vol. xvii. pt. 2, 



p 320, pi. vi. fig. 1. 

 1896. Natica siibiioce, Pritchard, Proc. Eoy. Soc. Vict. vol. viii. n.s. p. 112. 



The shell of this species is flattened, and, in consequence, is 

 not so globose as JSf. hamiltonensis ; neither is the spire elevated. 

 It is very closely allied to the European Eocene N. noes, 

 D'Orbigny, but the spire of the latter is more salient, its 

 funiculus is not so much dilated, and the suture is cut in, whereas 

 in iV. subnoce the suture is almost concealed. 



Dimensions. — Length 125 mm. ; breadth 11mm.; length of 

 aperture 9 mm. 



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



G. 9413. Two examples with funiculus well developed. 



Purchased. 



