Reports and Proceedings — Zoological Society of London. 85 



taurus), Laraellibranchiata. Gasteropoda, and Cephalopoda. This 

 memoir is published, Mr. Whitfield states, with a view of avoiding 

 a redescription under other names than the original ones, as it is 

 deemed advisable to illustrate these types from the specimens 

 originally used, a course which has been now followed with three 

 exceptions. In Part I of Vol. I Mr. Whitfield, it will be 

 remembered, gave descriptions and figures from the types of Lower 

 Carboniferous Crinoids in the " Hall " collection, of which he is 

 Curator. A. C. 



BEPOETS -A.1NT1D ^E,OGElE3XDI35rC3-S. 



Zoological Society of London. 



December 17th, 1895.— Sir W. H. Flower, K.C.B., LL.D., F.E.S., 

 President, in the Chair. 



Mr. F. A. Bather read a paper on a remarkable and very 

 beautiful form of fossil crinoid, without a stalk, named Uiniacrinus. 

 The paper attempted a complete morphological description of 

 Uintacrinus socialis, based on specimens from the Upper Cretaceous 

 Beds of Western Kansas, now in the British Museum. The 

 deficiencies of previous accounts were made good, and their errors 

 corrected; this was specially the case with regard to the inter- 

 brachials, interpinnulars, brachials, pinnules, and joints. The 

 comparison with other crinoids, thus rendered possible, showed 

 that Uintacrinus could not be related either to the Camerata or 

 to the Ichthyocrinidas. It must therefore be related either to the 

 Palaeozoic Inadunata, or to their Mesozoic descendants, the 

 Canaliculata. Among these a process of comparison and elimination 

 left behind only the ascending evolutionary line that contained 

 Encrinus, Dadocrinus, Pentacrinus, and Apiocrimis. A simple 

 inspection enabled one to fix on Padocrinus as the one among 

 all known genera that was most nearly related to the ancestor 

 of Uintacrinus. 



Geological Society of London. 



I._January 8, 1896.— Dr. Henry Woodward, F.E.S., President, 

 in the Chair. The following communications were read : — 



1. "A Delimitation of the Cenomanian, being a Comparison of the 

 Corresponding Beds in Southern England and Western France." By 

 A. J. Jukes-Browne, Esq., B.A., F.G.S., and William Hill, Esq., 

 F.G.S. 



The object of the authors is to compare the beds which form the 

 lower part of the Upper Cretaceous Series in those parts of Southern 

 England and Western France which are nearest to one another. 

 They briefly trace the history of English and French geological 

 research, and remark that even at the present time French geologists 

 are not agreed as to the beds to be included in their " etage Ceno- 

 manien." 



The authors feel justified in taking the English succession as a 



