IV Content X. 
New Lamellibvanchiatfi. PI. vii. E. 0. Ulrioii 06 
The (Toologic Evolution of the Non-Mountainoiis Topo- 
graphy of the Texas Region. Robt. T. Hill. . . . 105 
Notes on Earthfpiakes in Nicaragua. February (i, 1892. 
J. Crawford llo 
Rcricir of Recent Geological Jjiteralnre. — The Earth and its Inhabitants. 
Eliske Reclus, 119. — Bosquejo de una Carta Geologica de hi 
Rejiublica Mexicana. Prof. Antonio Del Castillo, 119. — Bei- 
Triige zur Geok)gie void Paleontologie des RepubHk Mexico. 
Dk. J. Fklix und Dr. 11. Lenke, 120. — The Geology and Paleon- 
tology of the Cretaceous Deposits of Mexico. Axoelo Heil- 
PRix, 121. — Correlation Papers — Cretaceous. C. A. White, 121. — 
Oihcial Maps of the Republic of Mexico. Minister oe Fomento, 
121.— On the Clinton Iron Ore. C. H. Smytiie, 122.— The Ortho- 
ceratidjie of the Trenton Limestone of the AVinnijieg Basin. J. 
F. WiiiTEAVES, 124. — The Geological and Natural History Sur- 
vey of Minnesota, Nineteenth Annual Report. N. H.Winciiell, 
124. — The principal Mississippian Section. Ckas. R. Keyes, 125. 
Becent Pnhlications. — 125. 
C'on-i'sjKiii'le.nce. — Termination of the Column of the Crinoid Hetero- 
crinus subcrassus. Dr. D. T. D. Dyciie, 130. — Glacial Stri.e in 
Kansas. L. C". AVooster, 131. — In the Texas Panhandle. Edw. 
D. Core, 131.— Dr. AVahnschaffe's AVork on the Drift De])osits of 
Germany. Joiix Brysox, 132. 
I'ersiiiitil (iiiil Scientific Xricx. 134. 
SEPTEMBER NUMBER. 
J description of two new (lenera and eight Species of Cani- 
erate Criiioids from the Niagara Group. Chas. 
WAniSMUTH and Frank* Springer 135 
Notes on a Collection of Fossils from the Lower Magncsian 
Limestone from Northeastern Iowa. S. Calvin.. 144 
The Scope of Paleontology and its Value to Geologists. 
H. S. Williams 148 
Some Problems of the Mesalti Iron Ore. N. H. AViNniKLL. 169 
Editorial Coiiuneat. — The United States Geological Survey, 179. 
Jieriew of I'eceiit Geological Literature. — The Alontana Coal Fields. 
AValter II.vrvey AVeed, 181. — Summary Report of the Geologi- 
cal Survey of Canada for the year 1891. A. R. C. Selwyn, 182. 
— Essayo Esladishio del Estado de Jalisco. Mariano Barceno, 
182. — Palaeozoic Formations in Southeastern jNIinnesota. C. AV. 
Hall and F. AV. Saudesox, 182. — Geology of the Taylorville Re- 
gion of California. J. S. DiLLER, 183. — Jura and Trias at Tay- 
lorville, Cal. Alpueus Hyatt, 183. — The Geological ]\[ap of the 
United States and the U. S. Survey. J ules AIarcoi:, 183. 
i.ixt of h'eceiit Publications, 184. 
I 'nrreapoiulence. — Geology at the Meeting of the British Association at 
Edinburgh, 188. 
Fersdiial and Scientijic Xeirx. — Notes on the INleeting of the Geological 
Society of America at Rochester ; Notice of the Rochester 
Meeting of theA. A. A. S. ; The AVorld's Congress of Geologists; 
New Discoveries of Manganese. — 193. 
