CONTENTS OF VOLUME III. 



Preface, 



Introduction, . . . . . . . . . • 



Rocks of the Helderberg mountains, . . 



Crinoidea and Cystidese of the Lower Helderberg 



Oriskany sandstone, . . 

 Brachiopoda of the Lower Helderberg group, 

 Lamellibranchiata of the Lower Helderberg group 

 Gasteropoda of the Lower Helderberg group. 

 Cephalopoda of the Lower Helderberg group, 

 Articulata of the Lower Helderberg group, 

 Crustacea of the Lower Helderberg group, . . 

 Crustacea of the Waterlime group, . . 

 Oriskany sandstone, 

 Crinoidea of the Oriskany sandstone, with reference 

 Brachiopoda of the Oriskany sandstone, 

 Lamellibranchiata of the Oriskany sandstone. 

 Gasteropoda of the Oriskany sandstone, 

 Pteropoda of the Oriskany sandstone. 

 Cephalopoda of the Oriskany sandstone, 

 New Species and Genera of Brachiopoda, 

 Catalogue of Species, and number of each from the 



group in Albany county. 

 Notes upon the Genus Graptolithus, and Description 



and allied genera, 

 Triplegia, Ambonychia, etc. 



Trilobites of the Shales of the Hudson-riyer group, 

 Index, 

 Errata, 



to p. 138, etc.. 



limestones and 



jower Helderberg 

 of species of this 



Pages. 



1-96 



97- 98 



99 - 152 

 153 - 262 

 263 - 291 

 292 - 341 

 342 - 348 

 349 



350 - 381 

 882 - 422* 

 401 - 405 

 406 



406 - 464 

 465 - 467 

 468 - 479 

 479 - 480 

 480 

 481 - 490 



492 - 493 



495 - 522 

 522 - 524 

 525 - 529 

 530 - 532 

 533 



