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Ortmann : Systematic position of Crangopsis vermiformis (Meek) from the 

 subcarboniferous rocks of Kentucky. pp. 283-289. 



Ortmann : New species of the Palinurid-genus Limiparus fount in the upper 

 Cretaceous of Dakota, pp. 290 297. 4 (ig. 



New- York.— Annals of the — . Academy of Sciences. T. IX, 1897, 

 Noa 4-5. 



— The American Muséum of National History, Annual Report 

 for 1896 (1897). 



Pennsylvania State Collège, 1896. Annual Report. 



Hopkins : The Building materials of Pennsylvania. 1. Brownstones, 122 pp., 9 fig., 

 26 pi. 



— Proceedings of the Academy of Natural Sciences. 1897, N» 1. 



Pilsbry : The affinities of Floridian Miocène Lands Snails, p 10. 

 Morris : The Primeval Océan, pp. 12-17. 



Philadelphia. — The Journal of the Franklin Institute. T. CXLIII, 



N° 897, Nos 3 et 6. 



E. S. Baich : Ice Caves and the causes of subterranean Ice, pp. 161-178, 2 pi. 



— Proceedings of the American philosophical Society. T. XXXVI, 



1877. N° 54. 



Sçudder ; The species of the genus Melanoplus, pp. 5-33. 



Merier : The finding of the remains of the fossil Sloth at Big Bone Cave Tennessee, 

 in 1876, avec fig. pp. 36-70. 



Cope : On new paleozoic Vertebrata from Illinois, Ohio and Pennsylvanica, pp. 71-91, 

 3 vol. 



Sadtler : The genesis and chemical relations of petroleum and natural Gas., 

 pp. 93-101. 



Peckhum : On the nature and origin of petroleum, pp. 103-112. 



Da^f : A suggestion as to the origin of Pennsylvania petroleum, pp. 112-115. 



Phillips : On the genesis of natural gas and petroleum, pp. 116-120. 



Phillips : On the occurrence of petnileum in the cavities of fossils, pp. 121-125. 



Mabery : On the composition of american petroleum, pp. 126-136. 



Portland. — Proceedings of the — . Society of Natural History. 

 T. 8. 1877, No 4. 



Frank. S. Morton : Foraminifera of the marine Clays of Maine, pp. 105-122, 1 pi. 



Rochester. — Bulletin of the Geological Society of America. 

 T. 3, 1897. 



Rice et Hitchcock : Remarks on the pétrographie excursion, pp. 3-4. 



Niles : Remarks on the pleistoiene excursion, pp. 5-7. 



W. Upham : Cuyahoga preglacial gorge in Cleveland, Ohio, pp. 7-13. 



Hopkins : Origin of conglomérats of Western Indiana, pp. 14-15. 



Perry Brigham : Glacial flood deposits in Chenango Valley, pp. 17-30, 1 carte. 



