Editor in! Comment. 181 
tella renauxiana of the same, and of D'Orbigny's Paleontolo- 
gie Francaise, should undoubtedly both be referred to the 
genus Glauconia. 
That there was in the collection, also from the '"Upper 
Kanab valley," a specimen of the Eagle Ford ammonite. Buchi- 
ceras sioallovii Shum.. is noteworthy. The writer has a 
specimen of this species from northern Kansas, representing 
a broad phase of the species, close to one such that is of occa- 
sional occurrence in Texas. 
It would be interesting to know concerning the specimen 
from the "Eagle Ford shales. Midlothian. Ellis county. Texas." 
marked "Placenticeras placenta DeKay ?" whether the varia- 
tion indicated by the interrogation mark be in the direction 
of /'. syrtalis Mort., or of the recently described var. cumminsi 
of that species. (See Fourth Ann. Rep.. Geol. Surv. Tex., pp. 
237-239. ) 
The Lower Cretaceous fossils exhibited were from the ( o- 
mancbe series and the Shasta formation. 
Tlie "Modiola concentrice-costellata Roem.?" is the recently 
described M. stonew aliens is. The species occurs also in the 
Fredericksburg of southern Kansas, and was recorded by the 
writer from Belvidere. Kansas, several years ago under the er- 
roneous designation of Modiola burling ton ens is Whitf. 
An excellent specimen (? the type) of Hill's superb Vola 
roemeri from the Vola limestone of Travis county. Texas, was 
among the more striking features of this part of the exhibit. 
The "Cardium hillanum^ on exibit represented the C. mul- 
tistriatum of Conrad, a phase of the subgenus typically de- 
veloped in the Comanche Peak limestone, and common, for 
example, at Georgetown. Texas, and which is strikingly 
different from the common phase of the genus in the Washita 
division. The latter phase is particularly well seen in the 
Denison beds. It remains to be shown whether these two 
phases are only extreme varieties of one specie- or are con- 
stantly distinct. 
The example of Astartt (" S 'teams ia") robbinsi White 
("20,137" — the type ?) is finely preserved. So far as could 
be seen, it did not show on the exhibited side any trace of the 
radial marks seen on the beaks in the type of .1. acuminata 
\ 
