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70 Scientific Intelligence. 



; ! was not able to get a specimen which could be identified. Gas- 



teropod remains were very abundant, forming almost the whole 

 || of certain thick layers. Of corals I obtained seven or eight 



specimens in a fair state ot perservation. 



The fossils which I carried away were submitted to Professor 

 C. E. Beecher of Yale College Museum, who identified the species : 



Chaetetes compacta Billings. 



Monticidopora lycoperdon Say. 



Orthis testudinaria{?) Dal. 



Murchisonia gracilis. 



Orthoceras, Sp. 



Professor Beecher says that in his judgment the specimens are 

 Jrom the Trenton group, probably from the lower part. I may 

 add that the color and general appearance of the rock go to 

 strengthen this view. 



The outcrop of limestone within which the above mentioned 

 fossils were found lies about a mile southeast of Pulver's Station, 

 and not ruOre than 000 yards from the Harlem railroad track. It 

 has the same northeasterly strike as all the rock in this region, 

 and a dip of about 50° to the southeast. The whole exposure is 

 approximately one-third of a mile long, with an average width of 

 150 yards. It is especially interesting for the reason that there 

 is no other limestone outcrop nearer than a mile, and no vestiges 

 of fossils in any rock within more than two miles. The whole 

 fossiliferous area is surrounded by highly metamorphic schists 

 and slates which extend to an unknown distance on the south 

 and east. From its fossils, its appearance, and its relation to the 

 rocks lying to the eastward, I judge this limestone to belong to 

 the same geological horizon as the other fossiliferous limestones 

 previously found by me north of Chatham in the same county. 

 5. Shallow-water origin of the Cincinnati shale and limestone. 

 II — An interesting paper on this subject by Mr. N. W. Perry, in 



the December number of the American Naturalist, finely illustra- 

 ted by phototypes, shows conclusively that, in accordance with 

 the views of Professor Newberry and the later observations of 

 Professor Shaler in Kentucky and Prof. J. F. James in Ohio, the 

 Cincinnati shales and limestone are of shallow-water origin. The 

 phototypes represent rain-marks, ripple-marks, and mud-cracks, 

 || of the most characteristic kind. Mr. Perry concludes that the 



rocks were made over the gradually sinking bottom of a shallow 



S sea * • 



H 6. The Lower Cretaceous of the San Carlos Mountains. Mex- 



ico. — Dr. C. A. White, the author of the paper on this subject 



in the last volume of this Journal, states in a letter of November 



19th to the editors: "I have no doubt that the 4,000 feet of 



/i limestone which I found in the San Carlos Mountains of Chihua- 



'jjjfl hua, were accumulated on a subsiding sea-bottom. Deep sea 



forms seem to be either wanting, or very rare. 1 did not detect 



any forms from top to bottom of the series that might not have 



lived in comparatively shallow waters." 



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