272 
Transactioj^^s Texas Academy of Science. 
432. White, Charles. A. 
Administrative Beport, Mesozoic Division of Invertebrate Bale- 
ontology. 
Eleventh Annnal Beport of the Dnited States G-eologieal Sur- 
vey, Part I. Greology, p. 107. Washington, 1890. , 
Under the oaption ‘Tield Work” mention is made ef the oontinuation of 
field observations in the southwest, which, in Texas, embraced the region 
about Presidio on the Eio Grande. Mr. Stanton aceompanied Dr. White. 
433. 
The Texan Permian laind its Mesioizoic Types O'f Fossils. 
'Bnlletin D. S. Geol. Snrv., Ho. 77, pp. 51; 4 plates. Wash- 
ington, 1891. 
Contents: Letter of Transmittal. Synopsis of Eesults. Introduction. 
Description of species. General Discussion. Index. 
‘‘Synopsis of results. In this bulletin is presented a summary of the 
various kinds of evidence that properly may be accepted as indicating the 
Permian age of a certain series of strata in Western Texas, which have 
been by some geologists referred to the Trias, and by others to the Permian. 
“'It also contains an announoement of the discovery in those strata of 
certain types of invertebrate fossils which usually are regarded as indica- 
tive of their Mesozoic age, commingled with a considerable number of 
Carboniferous types. lA. large proportion of the latter forms are well- 
known Coal-measure species. 
“All these species are illustrated on accompanying plates, and some of 
them are described as new. This discovery is the first of the kind that 
has been published concerning North American strata, but it is similar 
in character to those made by Waagen in India, Gemmellario in iSicily, and 
Karpinsky in Eussia. 
“The paleontological balance which is indicated by this commingling of 
earlier and later types in the Texan strata is treated as an item of evidence 
in favor of their Permian age.” 
The closing portion of the bulletin is^ devoted to a general discussion of 
the subject of the existence of the Permian in North America. 
434. 
The Texan Begion. 
Oorrelation Papers. Cretaceous. 
Buliletihi D. S. Geol. Surv., Ho'. 82, pp. 114-130. Washing- 
ton, 1891. 
Boundaries of the Texan Eegion arbitrary: shown on map opposite p. 72. 
Area embraces portions of Missouri, Arkansas and Louisiana, a part of 
Indian Territory, and much the greater part of Texas. The relations of 
the Cretaceous deposits of the eastern and central parts of the continent 
may be observed here. Important deposits found not known in eastern 
and northern parts of the continent. The region is nearly divided by the 
southern prolongation of the great interior Paleozoic area. Surface of the 
