IV 
Contents. 
Editorial Commeyit. — The Parliament of science in the United Btates, 117. 
Review of Recent Literature. — History and character of Septastrea, and its 
identity with Glyphastrea — Spicules of Archfcocyathus minganensis 
— Chert and schists of Spitzbergen, and sponges described by Dr. E. 
von Danikowski, G.J. Hinde, 127-128. — Amm-ican geological clas- 
sification and nomenclature, Jules Marcou, 129. — Three formations 
of the Atlantic slope, W. J. McGee, 129.— The Syncarida, A. S. Pack. 
ARD, 131. — Wind-blast accompanying avalanches, J. A Symonds, 132. 
— New trilobite in the slate quarries of Wales, Dr. II. Woodward, 
132. — Relations of fossil fish to one another, Dr. Traquair, 133. — 
Geol. and Nat. Hist. Survey of Canida[vol. ii], 133. 
•Correspondence. — ^The Taconic at Quebec, A, R. C. Selwyn, 134. — Earth- 
quake tremors at Charleston, Claypole, 13."). — Glacial origin of the 
beaches of Long Island, Bryson, 13G. — The Taconic at Boston, HyXtt, 
137. 
Personal and Scientific Neios. — Messrs. Claypole, Nutting and McG^e.— 
Cleveland meeting of A. A. A. S. — Drs. Frazpr and T. Sterry Hunt 
sail for Europe. — The appointment of R. T. Hill. — W. T. Cummins 
on Texas Carboniferous, 137. • 
SEPTEMBER NUMBER. 
The International Congress of Geologists. Reports of 
the American Committee 139 
Report of the Sub- Committee on the Archa3an. By Per- 
6IF0R Frazer 143 
A. Opinions on the work of previous sessions of the 
Congress, 146. — B. Propositions for the division of the Ar- 
chajan, 153. — G. Horizons of unconformity in the Archaean, 
157. — Z>. Petrographical and chronological sub-divisions of 
the Archaean, 159. — E. How should the eruptives bf^ classi- 
fied? 160.— i^. Hebridian, Dimptian and Arvonian, 163— G*. 
Crystalline rocks later than the Archoean, 164. — IT. ('ry:*tal- 
line rocks in the Archanin that occur later, 167. — /. Is min- 
eral constitution indicative of age? 168. — J. Is the Arrha3an 
of igneous or sedimentary origin? 171. — K. What evidences 
of life in the Archaean? 173 — L. Is Eozoon canadense of or- 
ganic oriizin? 175. — LL. System of coloring eruptives on 
•maps, 176. — 3f. Should serpentine constitute a class of 
eruptives? 179. — N. Is serpentine an alterwtion product of 
sedimentaries or of eruptives? 180. — Conclusions, 181.^ 
Appendix T. Claims of the term Azoic, 184 — Appendix II. 
Opinions of some English geologists on the Archo?an rocks, 
187. 
Report of the Sub-Committee on the LoWer Paleozoic. 
By N. H. WmcHELL 193 
Introductory, 193. — General Principles. 196 — Views of 
Prof. J. D. Dana, 198.— Recommendation of Mr. S. W. Ford, 
199. — Communications from Profs. Hall and Hitchcock,200.^ 
Views of Dr. T. Sterry Hunt, 202. — Researches of Prof. Juies 
Marcou, 202.— Views of Dr. Alexander Winchell, 202.— 
Communication from Dr. J. S. Newberry, 203.- -Other 
opinions, 207.^Discus^.ion of evidence and opinion, 208. — 
Use of the term Taconic, 208. — Use of the term St. Croix, 
209. — Use of the terms Menevian and Ordovician, 211. — 
Resume, 211. — Conclusions, 212. — Synopsis of the opinions 
of Mr. Walcott, 215— 219.— Note by the reporter on Mr. 
Walcott's views, 220—224. 
