ILLUSTRATIONS. 



Page. 



XVIII. Contact of pegmatites with Kingstown shales, Watsons Pier, Rhode Island 242 



XIX. Coarse pegmatites of Watsons Pier, Rhode Island 244 



XX. Cross-stratification in pebbly sandstone of Kingstown series, Devils Foot 



Ledge, Rhode Island 248 



XXI. Sandstone-gneiss of Kingstown series, Devils Foot Ledge, Rhode Island 334 



XXII. Stratification and slaty cleavage, Aquidneck shales, eastern shore of Prudence 



Island 350 



XXIII. Wave-cut bench in Aquidneck shales, western shore of Prudence Island 355 



XXIV. Fretwork weathering of Aquidneck shales, Prudence Island 362 



XXV. Pegmatite dikes cutting Kingstown shales, Watsons Pier, Rhode Island 376 



XXVI. Hoppin Hill, a granite mass surrounded by Cambrian, North Attleboro, 



Massachusetts 386 



XXVII. Sketch map of the North Attleboro Cambrian localities 388 



XXVIII. Sections in the Narragansett Bay region 394 



XXIX. Sections in the Narragansett Bay region 394 



XXX. Sections in the Narragansett Bay region 394 



XXXI. Geological map of the southern part of the Narragansett Basin 394 



221 



