THOMPSON: SNAIL GENUS MARSTONIA






I 'V


1mm


 1mm








4-A*


 1mm 1mm

FIGURE 3.-(A) Marstonia pachyta new species, HOLOTYPE: UF 22222; (B) Marstonia agar-
hecta Thompson, HOLOTYPE: UF 20528; (C) Marstonia castor new species, HOLOTYPE: UF
22176; (D) Marstonia halcyon new species, HOLOTYPE: UF 22312.