A Sftidu of I III' Bch-idcre Jieds. — ('raijiii. 'Ml 
of a collection made by Prof. O. C. Charlton and himself in 
passing a single hill-slope when approaching Walnut Si)rings 
from Iredell. These specimens are of the typical phase shown 
in ('onrad's original illustration, having the ribs ornamented 
with low, narrowly compressed tubercles or cross-folds. This 
type of ornamentation is quite different from that displayed 
by the T. cJarigerd. In the latter, which occurs abundantly 
and beautifully preserved in the Denton marls of Cooke 
county, Texas, and the Choctaw Nation, the ribs bear short, 
erect, triangularly-stalked, clavate, or tubercular-ended 
spines. No one having well-preserved Trigonias from these 
two terranes before him, could confuse them. 'I'here occur, 
however, in the Mentor beds of Saline county, Kansas, 
numerous molds of a Trigonia that the writer has elsewhere 
referred to T. claiu'iiciut, but which are more or less interme- 
diate, so that it is not improbable that T. clarigera will prove 
to be a variety, though, as typically developed in the Denton 
marls, it would at least be a very strongly marked variety of 
2\ ehiovfiL The record of T. clavigcra for the Kiowa shales 
is here withdrawn, as the specimens on which it was given 
were poorly preserved and the specific determination was 
based largely on stratigraphic considerations. 
Card! II III kansasciise, which Prof. Hill calls a Dakota 
species, stating (loc. cit., page 228) that Mr. Stanton fails 
to find it in the Hill collection from the Kiowa shales, is one 
of the con)nionest fossils in the shell-limestone of the Blue 
(Jut shales and occurs also in the Champion shell-bed, but in 
the latter has been found only in Champion draw and in 
moderate number. It does not occur in the Dakota, but is an 
abundant element of the fauna of the Mentor beds, from 
which came Mr. Meek's types of the species. Poorly pre- 
served specimens, showing the same misleading aspect of the 
ornamentation as is shown in the im])erfect types figured by 
Mr. Meek, are not uncommon. 
The Kiowa shales fossil that the writer calls Pnilncd rdiiuu. 
fexaiiinii, which is probably the same that Mr. Stanton has 
identitied from these shales as mullisfridfinn, is in reality 
somewhat intermediate in chara(;ter IxMween these two 
species. It differs widely from equal-sized si)ecimens of 
P. mitllislridhi III from the Sierra J-Jlanca mountains of El 
