JOUKNAI. OK CONCHOI.OCY. 



I'l.AlK I. 



[I'hoto., J. W. Jacksaii. 



Fig. I. — Bi-achypodella trinitaria (Pfr. ), x 2.\. 



" 2-3. — ,, oropouchensis, sp. nov., x 2\. 



■>• 4- — ,, ,, (axis), X 5. 



rj 5~6. — Tiopidophoi-a staiideni, sp. nov., natuial .size. 



