EXPLANATION OF PLATES. 



PLATE I. 



Fl«. PAGE 



1. AcUvon scrobiculatus, TenisonAYoodii. Eocene: Muddy Creek. 

 a, front ; b, back of shell ( x 2 diam.) ; and detail of 

 sculpture. [G. 4296.] 7 



■2. Toniatellcea (Triploca) ligata, Tate (sp.). Eocene : Adelaide. 

 Protoconcli ( x 22 diam.) : a, side view ; b, view from above. 



[G. 9305.] 9 



3. Adelactmon olivellceformis, Tate (sp.). Eocene : Muddy Creek. 



Protoconcli ( x 20 diam.) : a, side view ; b, view from above. 



[G. 9307.] 11 



4. Scaphander tenuis, sp. nov. Eocene : Muddy Creek. «, front ; 



6, back (x 1| diam.) ; c, detail of sculpture. [G. 4171.] \-l 



5. Ringicida lactea, Johnston. Eocene : Muddy Creek. Shell 



( X 5 diam.) : a, front ; 6, back. Protoconch ( x 14 diam.) : 

 c, side view ; d, view from above. [G. 9304.] IG 



0. Clio (Sti/Uola) ranyiana, Tate (sp.). Eocene : Muddy Creek. 

 a, b, summit of shell, showing inflations ( x ]2 diam.). 



[G. 9306.] 20 

 7. Umbraculum australe, sp. nov. Eocene : Muddy Creek, a, 

 under surface ; b, upper surface ; c, side view (nat. size). 



[G. 4183.] 2.3 



