XIV 



BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



PUBLICATIONS OF THE GEOLOGICAL SOCIETY (JF AMERICA 

 Regular Pubmcations 



The Society issues juiimally, in four (luarterly parts, a sinj>;le serial octavo 

 publication entitled Bulletin of the (Geological Society of America, the edi- 

 tion being 750 copies. A small supply of authors' separates of the lou.u;er arti- 

 cles is kept for sale by the Secretary at the prices quoted in each volume. 



The Bulletin is sold at the uniform price of ten dollars ($10.00) per vol- 

 ume, with a discount of twenty-five (25) per cent to Fellows of the Society. 

 A discount of ten (10) per cent is allowed to persons residing elsewhere than 

 in North America and public and institutional libraries ; carriage extra. Sub- 

 scriptions are payable in advance. Regular subscribers within the United 

 States of America and its possessions receive their parts, postage paid, as 

 issued. Forty (40) cents per volume must be added to the subscription price 

 to cover postage to other countries in the Postal Union. 



The price of the index to volumes 1-10 is $2.25 ; to volumes 11-20, $3.50. and 

 to volumes 21-30. $4.00 ; carriage extra. No reduction is made to dealers. 

 Orders should be addressed to the Secretary, whose address is care of the 

 American Museum of Natural History, New York, N. Y., and drafts and money 

 orders should be made payable to The Geological Society of America. 



- -zj 

 Description of the Published Volumes 



Volumes. 



Pages. 



Vol. 

 Vol. 

 Vol. 

 Vol. 

 Vol. 

 Vol. 

 Vol. 

 Vol. 

 Vol. 

 Vol. 10 

 Index 

 Vol. 11 

 Vol. 12 

 Vol. 13 

 Vol. 14 

 Vol. 15 

 Vol. 16 

 Vol. 17 

 Vol. 18 

 Vol. 19 

 Vol. 20 

 Index 

 Vol. 21 

 Vol. 22 

 Vol. 23 

 Vol. 24 

 Vol. 25 

 Vol. 26 

 Vol. 27 

 Vol. 28 

 Vol. 29 

 Vol. 30 

 Index 

 Vol. 31 

 Vol. 32 



593 



622 



541 



458 



655 



528 



558 



446 



460 



534 



209 



651 



538 



583 



609 



636 



636 



785 



717 



617 



749 



to volumes 11-20 422 



1909 823 



1910 747 



1911 758 



1912 737 



1913 802 



1914 504 



1915 739 



1916 1005 



1917 679 



1918 644 



to volumes 21-30 325 



1919 .450 



1920 488 



1889 



1890 



1891 



1892 



1893 



1894 



1895 



1896 



1897 



1898 



to volumes 1-10. 



1899 



1900 



1901 



1902 



1903 



1904 



1905 



1906 



1907 



1908 



+ xii 

 + xiv 

 + xi 

 + xi 

 + xii 

 + x 

 + x 

 -fx 

 + x 

 + xii 



+ xii 

 4- xii 

 4- xii 

 + xii 

 + x 

 + xii 

 + xiv 

 -}- xii 

 + x 

 + xiv 



+ xvi 

 + xii 

 + xvi 

 4- xviii 

 + xviii 

 + xxi 

 + xviii 

 -1- xxii 

 4- xix 

 -j- xiii 



-f xviii 

 -{- xviii 



Plates. 



13 



23 

 17 

 10 

 21 

 27 

 24 

 51 

 29 

 54 



58 

 45 

 58 

 65 

 59 

 94 

 84 

 74 

 41 

 111 



54 

 31 

 43 

 36 



28 

 27 

 30 

 48 

 22 

 15 



14 

 12 



Figures. 



51 



63 

 72 

 55 

 43 

 40 

 61 

 29 

 49 

 83 



37 

 28 

 47 

 43 

 16 

 74 

 96 

 59 

 31 

 35 



109 

 66 



44 

 60 



47 

 41 

 55 

 102 

 67 

 40 



60 



