Cragix.] DESCRIPTIONS OF SPECIES. 89 
flattened and angulated on its upper part, the flattened zone being 
rather narrow and adjacent to the suture; aperture subovate; outer 
lip thin (?); inner lip covered with a calcareous callus, which is so 
arched as to indicate the presence of a low fold or tooth-like protuber- 
ance below; entire surface ornamented with a regular, open lattice- 
work of narrow, strongly elevated, transverse ribs, which are crossed 
by similar but somewhat more delicate revolving ones, the points 
of intersection being slightly protuberant to subtubercular, and the 
rectangular included intervals being gently concave and each marked 
by several raised growth lines. 
Measurements. — Height, 10.5 mm.; breadth, 17 mm. 
Occurrence. — A mile and a half east of Malone station; with 
Gryphcea mexicana, Pleurotomaria circumtrunca, Natica williamsi, 
etc. Known only by a single specimen, which has the bas3 and the 
margin of the outer lip broken off. It is possible that specimens with 
the apertural characters Avell preserved might show this shell to 
belong to Purpurina. 
Genus DELPHINULA Lamarck. 
DELPHINULA STANTOXl Sp. II. 
PI. XIX, figs. 12-14. 
Shell rather small, conoidal-turbinate. narrowly umbilicate, con- 
sisting of ij ventricose whorls, thick, especially in the vicinity of the 
peristome; spire about equal to the body whorl in height: aperture 
circular or nearly so; whorls rather closely ornamented with revolv- 
ing lines of crowded and small but prominent granules, each granule 
shown, when the ornamentation is well preserved, to consist of a stout 
hood-like imbrication; body whorl flattened above in a rather broad 
zone that looks upward and outward, and is externally limited by an 
angulation that is marked by a line of relatively coarse and promi- 
nent hood-like imbrications, below which, in a narrow zone, the 
surface of the whorl is again somewhat flattened and looks outwardly, 
a second line of relatively coarse and prominent granules traversing 
the flattened upper slope of the body whorl, just below the suture. 
Between the upper and lower lines of coarse imbrications there are 
two lines of the smaller ones, and between the lower and the umbilical 
border there are nine. 
Measurements. — Height, 16 mm.; breadth, 13 or 14 mm.; angular 
divergence of slopes, 80°. 
Occurrence. — A mile and a half east of Malone station, in the lower 
exposed part of the Theta ; associated with Natica williamsi, Pleuro- 
tomaria circumtrunca, Gervillia corrugata, Gryphcea mexicana, and 
many other, especially of the smaller of the Malone fossils. Five 
