152 Scientific Intelligence. 



No. 216. Geology and Water Resources of the Republican 

 River Valley and Adjacent Areas, Nebraska ; by G. E. Condra. 

 Pp. 71, with 13 plates and 3 figures. 



3. A Report on the Cretaceous Paleontology of New Jersey; 

 by Stuart Welter. Geol. Surv. of New Jersey, vol. iv of 

 Paleontology Series, 1907, one vol. text, 871 pp., vol. of pis., 111. — 

 In these valuable volumes there is brought together all that is 

 known in regard to the Upper Cretaceous invertebrate faunas of 

 New Jersey. About 600 species are described and illustrated, of 

 which 95 are new. 



The Upper Cretaceous formations are 13 in number and their 

 faunal content is discussed in detail on pages 27-175. The low- 

 est horizon is the estuarine Raiutan, followed by 9 marine zones 

 to and including the Tinton, all of which are embraced under 

 the new term Ripleyian (corresponding to the European Senonian 

 and especially that of Aachen in Germany). The three highest 

 members are embraced under the new term Jerseyian (European 

 Maestrichtian or lower Danian). The older general terms, Mata- 

 wan, Monmouth and Rancocas, are abandoned because but two 

 major paleoutologic divisions can be recognized, to which none of 

 these names is applicable. 



The author states that in the Ripleyian of New Jersey there 

 are " a considerable number of species [that] have an extra-terri- 

 torial distribution, and by far the larger number of these species 

 which occur outside of New Jersey are known from the upper 

 Cretaceous formations of the Gulf -border region, in the Ripley 

 and associated formations of .Alabama, Mississippi, Texas, etc. 

 The community of species between this southern region and 

 New Jersey is so marked that no doubt can be entertained as to 

 the essential time-equivalent of the formations and faunas of the 

 two regions, and because of the typical development of the faunas 

 in the Ripley formation this series may be designated by the 



name Ripleyian." The Ripleyian fauna as seen in New 



Jersey is a complex assemblage of organisms with two or more 

 distinct facies, which were doubtless associated with different 

 environmental conditions, such as depth of water, character of 

 the sea bottom, etc. . . . Two distinct [alternating] facies of 

 the fauna have here been distinctly recognized, one of which, the 

 Cucullma fauna, ... is characteristic of the more glauconitic 

 beds. . . . The second faunal facies, characterized by Lucina 

 cretacea or its associates, occurs in the clays and sandy clays." 

 "In tracing their relationships with other Cretaceous faunas in 

 North America, it is found that they have a close analogue in the 

 faunas of the Montana group of the West and Northwest." 



The following Fox Hills species have been identified in these 

 New Jersey faunas : Micrabacia americana, Cuspidaria ven- 

 tricosa, Cymella undata, Pteria petrosa. Many others of the 

 New Jersey species are clearly allied very closely to Fox Hills 

 forms. The relationship with the Montana is stated to be "far 

 closer than would be suggested by a mere comparison of the 



