172 
Transactions Texas Academy of. Science. 
Hill^ Egbert T. 
“In aonelusion, ipeirmit me to say that there is not one trace of the 
Jurassic formation over the Texas vegion, as 'Mr. Marcoii so positively 
affirms, and, furthermore, there is no evidence that it was ever there, the, 
whole trend of the testimony being to show that that region was land 
during the Jurassic period.” 
'The Paleontology of the Cretaceons Formations of Texas. — The 
Invertebrate Fossils of the Caprima Limestone Beds. 
Proceedings of the Biological- Society of Washington, 'VoL 
VIII, pp. 97-1 0'8, pis. xii-xiii. July 20, 1893. 
iConitents ; I. '^Stratigraphic Position of the Oaprina Limestone Beds in 
the 'Comanche Series. TI. Characteristic Poasils. (List of species from 
the Rudistes horizon at Austin, etc.) Chamidae, Rudista?. III. Age of 
the iCaprina Limestone Beds. IV. Description of Species: Ostrea mun- 
soni sp. nov. ; RadioUtes davidsoni, sp. nov. Plates 
“About midway in the column composing the Comanche series or Lower 
Cretaceous of Texas, and oonstituting the uppermosit member of the Pred- 
■ erieksburg division (Comanche Peak group of Shumard in part), there is 
a peculiar group of strata known as the Oaprina limestone of Shumard. 
“Dr. Shumard placed the bed in the Upper Cretaceous, at the very top 
of the whole of the fifteen or more subdivisions of the two great formations 
of Texas, instead of in the middle of the leaver series, where it belongs.” 
Pp. 97-98. 
The ’Caprina limestone is now known as .the Edwards limestone, a geo- 
graphic name having been .substituted for Shumard’s term. (See Hill .and 
Vaughan, “G-eology of the Edwards Plateau,” etc., 18th Ann. Rept. U. S. 
Ueol. 'Survey, Pt. II, p. 227, note. 1898. 
248. 
The Coal Fields of Texas. 
'Mineral Eesonrces ol the U. S., 1892, p'p. 507-509. Washing- 
ton, 1893. 
No literature since the last report. Texas Geological Survey discon- 
tinued. Development of the Central Texas coal field has progress.ed in 
Parker and Erath counties. Cretaceous coal field in the vicinity of Eagle 
Pass has been further prospected. Interest in the utilization of Tertiary 
and Cretaceous lignites. Conclusions quoted from Report on Brown 
Coal and Lignite by E. T. Dumble, State Geologist (p. 230). Report does 
not deal with cost of production and manipulation. It has not been shown 
that lignites can enter seriously into competition with the true coals of the 
region, 'Or that they can be profitably used except locally. One of the chief 
obstacles to their utilization is the large amount of water they contain. 
249. 
Art. 'Olay Materials of the United States. 'Mineral Eesonrces 
of'theU. S. 1892. 
(Claj Materials of Texas), pp. 735-737, Washington, 1893, 
