154 Scientific Intelligence. 



their general development indicates direct equivalence and water 

 intercommunication. 



In the Carnic Alps, however, the author shows that the black 

 limestones are differently interbedded with the white limestones 

 and, further, that at one end of the region the sections are 

 mainly black, while on the other they are mainly white with 

 intermediate horizons of black limestones. In other words, in 

 the Carnic Alps the faunas that characterize the Bohemian lime- 

 stone horizons, Fl and F2, are here also restricted to the same 

 kind of limestone ; but these specific assemblages are due to the 

 physical character of the sediments and do not represent distinct 

 time horizons. This is a very important observation and seem- 

 ingly adjusts the difficulties in the age interpretation of the 

 Bohemian etages Fl and F2. 



As is well known, the Lower Devonian has a decided Silurian 

 impress and this fact is again brought out in this study. Of the 

 112 species 24 are closely related to Silurian forms found in Got- 

 land, and 28 with those in etage E2 of Bohemia. In other 

 words, the Lower Devonian life of southern Europe is a direct 

 outgrowth of the Silurian faunas of the Atlantic area. The 

 American Helderbergian is also derived from this area, but 

 belongs to a distinct province. Of American species in the Car- 

 nic Alps there are : Phanerotrema labrosa, -Loxonema robus- 

 tum ?, Strophostylus expansus, S. ventricosus ?, and Orthonychia 

 widata? c. s. 



5. Geolor/ic Map of the Rochester and Ontario Beach Quad- 

 rangles ; by C. A. Hartnagel, Bull. 114, N. Y. State Mus., 

 pp. 35, 190*7, and map in pocket. — In this bulletin the various 

 Silurian deposits outcropping about Rochester, N. Y., are 

 described and mapped. The section extends from the Medina 

 red shale well up into the Salina. The^Clinton formation is here 

 divided into Sodus shale (24 feet), Furnaceville iron ore (14 

 inches), Wolcott limestone (14 feet), Williamson shale (24 feet) 

 and the Irondequoit limestone. c. s. 



6. Scapolite Rocks of America ; by J. E. Spurr (Communi- 

 cated). — In an article in this Journal published in October, 1900 

 (vol. x, pp. 310, 311), I described rocks from the Yentna river as 

 containing scapolite. Within the last few months Mr. F. L. 

 Ransorne has called my attention to his observation that the min- 

 eral in these rocks which was described as scapolite is not scapo- 

 lite, but quartz. On investigation I have found that this latter 

 determination is correct. In the same article I have described 

 another occurrence of scapolite rocks from the Kuskokwim river 

 and have lately tried to find the material which I described, and 

 so far without success. For the reasons given above, however, I 

 am at present skeptical as to the value of this latter determina- 

 tion also. 



7. Mammalian Migrations between Europe a*id North 

 America. — Attention is called to the fact that in an article by 

 Dr. W. D. Matthew upon the above subject in the January 



