Fossil Vohitcs. 201 



more adult t'onii in wliirli the iiciinlt iiiiati' and Ixidy wIkmIs sIidw 

 the development of strong, liigli shouldered ril)s spaced widi-lv 

 apart, and with a slightly thickened and reverted outer lip. 



EXPLANATION OF PLATES. 



Plate XX. 

 Fig. 1. — Voluta weldii. T. Woods (typical). 



2. — Voluta weldii. var. intermedia, var. nov. ; dorsal view. 

 •J. — Voluta weldii. var. inteiincdia. var, nov.; front view. 

 4. — Voluta weldii, var. angustior. var. nov. ; front view. 

 5. — Voluta weldii, var. angustioi-, var. nov.; dorsal aspect. 

 6. — Voluta macroptera, McCoy, young exam])le. dorsal aspect. 

 7. — Voluta lirata. .Tolinston ; front view. 

 8. — Voluta lirata, Johnston; dorsal view. 



The aI)ove figui-es are all natural size. 



Plate XXI. 



Fig. I. — Voluta wynyardensis, sp. nov.; dorsal view. 

 2. — Voluta wynyardensis, sp. nov. ; front view. 

 3. — Voluta stephensi, Johnston; dorsal view; reduced one- 

 half. 

 4. — Voluta stephensi, Johnston; fiont view; leduced one-half. 

 My best thanks are due to Mr. L. Knibbs for the photographs 

 from which these shells are reproduced. 



