BULLETIN FLORIDA STATE MUSEUM


A

1mm


D

1mm


1mm


C

Imm


r1mm


E

1mm .


Imm


H

Imm


FIGURE 25.-Marstonia opercula: (A) M. lustrica (Pilsbry); (B) Nl. arga new species; (C) M. og-
morhaphe new species; (D) M. pachyta new species; (E) M. castor new species; (F) Al. olicacea
(Pilsbry); (G) AM. halcyon new species; (H) M. agarhecta Thompson.


Vol. 21, No. 3