Invertebrata from the Neocomian of Kansas. — Cragin. 11 
apertural details nor the ornamentation of the lower part of the body- 
whorl. The broken surface apparently indicates an open umbilicus, 
but not so plainly as to banish doubt. 
The species was named in honor <>l' the late illustrious Dr. J. S. New- 
berry: earliest geological explorer of southwestern Kansas. 
TROCHUS TEXANUS Roem. 
A single well preserved specimen of this rare Trochus was 
obtained about two miles southwest of Belvidere station, from 
No. 3 of the Belvidere section. This, so far as the writer is 
aware, is the first reported occurrence of the species outside 
of the type-locality. 
The shell is a little more elevated than the example figured 
by Dr. Roemer, owing to the less rounded character of the 
apical part of the spire; and, though the spiral lines of gran- 
ules are five in number on each whorl, the ornamentation is 
somewhat finer than in that example. But as the Kansa- 
shell is also somewhat smaller, the granules w r ould necessarily 
be smaller also, and the variation from the Texas form, in 
ornamentation and angular divergence of slopes, indicated by 
this specimen does not, at furthest, equal that seen in 
Turritella seriatim-yranulata Roem. 
Tlie measurements of the Kansas shell are: night 14.5; 
breadth of the body-whorl 11.5 mm.; divergence of slopes 
(lower part of shell) 51 degrees. 
PETERSIA MEDICINENSIS. sp. nov. 
Shell of medium size, consisting of five or more ( V six or 
seven) whorls, spire rather short, acute, equalling about or a 
little less than half the hight of the shell ; whorls shouldered 
and ornamented with numerous closely-spaced, raised, revolv- 
ing lines and with prominent but rather narrow vertical ribs 
or folds, of which latter there are about 14 on each of tin- 
lower whorls; aperture elongate, subquadrilateral, bent 
slightly backward below to form a very short or rudimentary 
notch-like canal, and with a somewhat similar rounded, everted 
notch at the upper (pdsterior) corner; spindle short: inner 
lip, within, bearing, opposite the middle of the aperture, two 
oblique, parallel, narrow, sharply-raised folds which do not 
extend outward to its slightly thickened and everted border; 
outer lip with a sharp, slightly crenulated edge, back of 
which the newest fold (in the stage of growth shown in the 
