MAllGINELLA. 91 



Marginella (Cryptospira) septemplicata, Tate. 



1878. Marginella [Persieula) septemplicata, Tate, Trans. Phil. Soc. Adelaide, 



1877-8, p. 95. 

 18S9. Marginella sepfeiiiplicata, Deunant, Trans. Eoy. Soc. South Aust. 



vol. xi. p. 43. 



Shell solid, ovately globose ; spire hidden ; aperture elongate, 

 slightly curved, widest in front, anterior canal deep ; outer margin 

 crenulated within ; inner margin callous, with from seven to eight 

 plications, the two situated most anteriorly being the largest, and 

 extending outwardly over the thick callosity which spreads all 

 round the aperture. 



This is unlike any other species of Australasian Marginella. The 

 spiral limb or callosity on the anterior of the columella, which 

 passes underneath another growth of callus on the inner margin, 

 is very distinctive, and is one of the reasons why the species is 

 here classified with Cryptospira. The number of plications on the 

 columella and the hidden spire are also specially characteristic. 

 Although not a typical Cryptospira, it is more closely allied to 

 that than to Persieula, which, typically, has an enormous callous 

 tubercle situated on the anterior portion of the inner margin, and 

 has not the limb referred to. 



Dimensions. — Length 6'5mm. ; breadth 4'5 mm. ; length of 

 aperture 6'5 mm. 



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



G. 4214. Three specimens. Presented by John Bennant, Usq. 

 Marginella (Cryptospira) ventricosa, Hutton (sp.). 



1873. Mitra ventricosa, Hutton, Cat. Tert. Moll. N.Z. p. 8. 

 1873. Marginella ventricosa, Hutton, id. p. 47 (index). 

 1878. Marginella ventricosa, Tate, Trans. Phil. Soc. Adelaide, 1877-8, 

 p. 94. 



" Ovato-ventricose ; spire very short; smooth; outer lip thickened, 

 strongly dentate; columella plaited. Axis 0-65 ; breadth 0-5." — 

 Hutton. This short description appears to apply to some specimens 

 in the Museum collection which are, however, too imperfect to 

 enable all the characters to be identified. 



Dimensions. — Length 23'5mm. ; breadth 16'5mm. ; length of 

 apertui'e 21 mm. 



