142 MESSRS. A. J. JUKES-BROWNE AND W. HILL : [May 1 896, 



Hence it is not surprising that the fauna of the French Ceno- 

 manian should differ considerably from the fauna of the Lower Chalk, 

 although we firmly believe that they existed contemporaneously. 



VI. Critical Remarks on some op the Fossils. 1 



The preparation of the following lists of fossils has involved a 

 considerable amount of critical work, in which we have been greatly 

 assisted by Mr. C. J. A. Meyer, F.G.S., and Dr, G. J. Hinde, F.G.S. 

 Mr. Meyer has collected and studied the fossils of the Devon cliffs 

 for the last twenty-five years, and has bestowed much time and 

 care upon the identification of the various species of echinoidea and 

 mollusca. The differences between the lists of these classes of 

 animals now given and those in his paper on the Beer Head sections 

 (Quart. Journ. Geol. Soc. vol. xxx. 1874) are chiefly due to his own 

 researches, the results of which he has generously communicated 

 to us. They have resulted in some corrections and in many fresh 

 identifications among the fossils in his unequalled collection. Some 

 of the specimens in this collection have already been figured by 

 Lycett and Davidson in the publications of the Palaaontographical 

 Society, and many others are awaiting the preparation of other 

 special monographs. 



To Dr. Hinde we are indebted for examining, and naming so far 

 as possible, all the sponges, hydrozoa, and polyzoa collected by 

 ourselves in Devon and in France. 



In order to explain the appearance of certain names in the lists 

 of fossils, we have thought it desirable to set forth the results of 

 these combined investigations and to make some critical remarks on 

 those species which are interesting, either from their being unknown 

 in England or from our having found a difficulty in identifying 

 them. In several cases also we have been able to determine the 

 identity of English and French species which had previously borne 

 different names, aud we think that such rapprochements will be 

 welcomed on both sides of the Channel. 



Sponges. 



Stauronema Cartert, Sollas, Ann. Mag. Nat. Hist. ser. 4, vol. xix. 

 (1877) pis. i.-v. 



This fossil was first found by one of us in the so-called ' Upper 

 Greensand' above the Gault at Folkestone in 1876, and was recog- 

 nized by Prof. Sollas as a new and peculiar form. In describing it, 

 however, he stated that it occurred in Gault and Upper Greensand, 

 having understood that the original specimens came from the 

 Folkestone Gault, and possessing a specimen from the Isle of Wight 

 which he believed to have come from the Upper Greensand. 



We think that the latter must have come from the Chloritic Marl 

 of the Isle of Wight, in which the fossil is common, while we have 

 never seen one from the Upper Greensand. We agree with 



1 Mr. Jukes-Browne is responsible for this section of the paper. 



