EXPLANATION OF PLATE III. 



(All figures on this plate magnified 52 diameters.) 



Fig. L — Cytheropteron ahyssorum. G. S. Brady, var. wilesensis, 

 var. nov. a, left valve ; b, outline of edge view. 

 Forty miles south of Cape \Mles, S.A., 100 fathoms. 



Fig. 2. — Cytheropteron dannevigi, sp. nov. a, left valve ; h, 

 outline of edge view ; c, outline of end view. Sta- 

 tion 36, east of Tasmania, 777 fathoms. 



Fig. 3. — Cytheropteron fimbriatum, sp. nov. a, left valve ; 

 b, outline of edge view. Station 36, east of Tas- 

 mania, 777 fathoms. 



Fig. 4. — Bythocythere velifera, G. S. Brady, a, left valve ; b, 

 outline of edge view. Forty miles south of Cape 

 Wiles, S.A., 100 fathoms. 



