Record of Geology of Texas, 1887-1896. 
151 
liiLL^ Robert T. 
figures a new genus of Eoliinodermata from Texas, to which, he gives the 
name of ‘Macraster,’ and calls the only species Macraster texanus. This 
fossil has long been familiar to the writer in his stratigraphic investiga- 
tions in Texas, and it makes a well defined horizon near the very top of 
the immense thickness of lower marine Cretaceous in Texas, and does not 
occur, as Dr. 'Roemer infers, from the specimens which accompanied it to 
Ceionany, with the Exogyra texana fauna, a .statement which has been 
verified by Mr. Geo. Stolley, the collector. This fact is important because 
of the tendency upon the part of Euriopean paleontologists to underesti- 
mate the value of the stratigraphic differentiation of the Texas Creta- 
ceous.” 
208. 
(On the Validity nf .seme hTcw Species fmin tlie Cretaceous of 
Texas.) 
Anier. Naturalist, Voi. XXlll, p. 169. Feb., 1889. 
“Herr Schluter, in two papers entitled ‘Ueber die regularen Echinoder- 
mata der Ixreide ISTo-rd Americas,’ and ‘Ueber Tnoceramus uiid Cephalo- 
poden der Texanischen Kreide,’ ( Niederrhein, 'Gesselschaft at Bonn, March, 
1887), describes Suleiiia mexicana, from Chihuahua, Mexico, and Inocera- 
mus subqitadratios, TurriUUes irrideiis, and T. varians from Austin, Texas. 
The validity of the three species last mentioned is exceedingly doubtful, 
as the descriptions give no data sufilcient to differentiate them from species 
already described by Roemer and ‘Shiiinard. He also asserts that the 
Austin Cretaceous is equivalent to that of Ems, Germany, a 'rather indefi- 
nite statement, since within the corporate limits of Austin is found nearly 
the whole range of the comprehensive Texas' .Gretaceous under conditions 
which could hardly be duplicated.”' 
209. ^ 
Events in North American Cretaceous History Tllnstrated in the 
Arkans'as-'Texas Division of the 'Southwestern Region of the United 
State's. 
Amer. Jonr. of Science, III, XXXVII, pp. 282-290. New 
Haven, April, 1889. 
Contents: 'Continental Limitations at the Beginning of the iCretaceous. 
The First Epoch of Subsidence. .The Second Epoch of Subsidence. Dis- 
turbances and Differentiation at tlie Close of the ..American Cretaceou=i. 
Post-Cretaceous Events which have .concealed 'Gretac-eous History. Table 
sliowing Events, Epochs, Distinguishing Fossils, Prevailing Sediments, and 
Thickness in W. Texas. 
“During the last two years the writer has been periinitted, by the joint 
effort of Dr. John C. Branner, State Geologist of Arkansas, and the Direc- 
tor of the United States Geological Survey, to investigate the .stratigraphic 
and paleontologic conditions of the northern and eastern termination of 
the Texas Cretaceous, and to trace out its detailed relations to those of the 
Gulf and western 'Stfites with their accompanying phenomena, The con- 
