p.4

Rusophycus pudicus, Hall,

Pal. of N.Y. Vol. 2 p. 24 pl. 8 fig. 6

General form elliptical, transversely
rugose or nearly smooth; a deep
longitudinal groove along the centre
reaching nearly to Each extremity.

L. 1.3 to 1.8 D. 0.8 to 1.0