p. 1

[blue ruled paper; worn embossing at u.l.: SUPERFINE LAID PAPER [scrolling banner surrounding text]]; handwritten page, verso, visible

Spirifer cuspidatus Sowerby [James De Carle Sowerby (5 June 1787 – 26 August 1871) was a British mineralogist, botanist, and illustrator.]
Delthyris cuspidata ["Delthyris cuspidata" is underlined] Hall. [James Hall Jr. (September 12, 1811 – August 7, 1898) was an American geologist and paleontologist] N.Y. Geol. Rep.
p.270 fig. 1.

Somewhat semicircular;
hinge line extended into acute ears;
broadly emarginate in front; mesial
fold broad, moderately deep and
undefined at the borders; sur =
face marked by many equal
centre ribs, (about 30 on each side
the mesial fold), those on the
mesial fold smaller; ribs crossed
by elevaled [elevated] lamellae toward the
margin of the shell.

L. 3.5 H 1.0