260 Notices of Memoirs — R. Bullen Newton — 



may be safely used for purposes of identification. To Mr. Clement 

 Reid, F.R.S., we are mainly indebted for most of our later knowledge 

 of the Leuham fauna, his researches forming part of the " Pliocene " 

 memoir before mentioned. At that time Mr. Reid had obtained an 

 important series of fossils from the Lenham Beds for the Museum of 

 Practical Geology, which, after being determined, were systematically 

 referred to in the memoir. In order to facilitate my studies on this 

 subject and to enable me to determine certain collections of similar 

 fossils in the British Museum, especially that formed by Mr. Graham 

 Wallas, I was very kindly allowed to loan this valuable type 

 collection made by Mr. Reid. During my studies in this direction it 

 has been necessary to introduce a certain amount of revision, both 

 among the genera and species as laid down in Mr. Reid's memoir. 

 The larger amount of material available at the present time has also 

 resulted in the determination of additional species, so that the shells 

 are regarded as numbering 77 species, which include 1 Scaphopod, 

 32 Gastropods, 43 Pelecypods, and 1 Bracbiopod, whereas Mr. Reid's 

 conchological list embraced 65 species, consisting of 1 Scaphopod, 

 27 Gastropods, 36 Pelecypods, and 1 Brachiopod. Among the 32 

 Gastropods now recognized, a new species has been described under 

 the designation of Ringiculella lenhamensis. In view of the fact that 

 no figures have yet been published of Lenham fossils, I have had 

 prepared some photographs of the more important shell-remains, 

 which on account of their reddish-brown colour and their more or 

 less obscure character have not been particularly successful ; yet it is 

 hoped they may serve a useful purpose in stimulating the interest of 

 the student who desires to pursue further researches on the conchology 

 of these little-known beds. 



To complete the Lenham fauna I have here briefly introduced 

 a list of the other organic remains which are found associated with 

 the shells : — 



Pisces. 



Selachian vertebras and a palatal plate as determined by Dr. A. S. Woodward. 

 Coll. B.M. 1 (Graham Wallas). 



POLYZOA. 



Fascicularia aurantium, M. Edwards. Coll. M.P.G., No. 398. 



Ciqmlaria canariensis, Busk. Coll. M.P.G., No. 399. B.M. (Graham 

 Wallas). 

 Annelida. 



Ditrupa subulata, Deshayes, sp. Coll. M.P.G., No. 395. 

 Crustacea. 



[A decapod claw.] Coll. B.M. (Graham Wallas). 



Balanus. Coll. M.P.G., No. 396. 

 Echinodekmata. 



TemnechinusC?). Coll. B.M. (Graham Wallas). 



Echinus woodivardi, Desor. Coll. M. P. G., No. 394. B.M. (Prestwich and 

 Graham Wallas). 



Dorocidaris papillata, Leske, sp. Coll. B.M. (Prestwich). 

 ACTINOZOA. 



Trochocrjathus(7). Coll. B.M. (Graham Wallas). 



1 The author desires to acknowledge his thanks to the authorities of the 

 Museum of Practical Geology, and particularly to Mr. H. A. Allen, F.G.S., of 

 that institution, for allowing him access to the " Beid " Collection. The letters 

 B.M. and M.P.G. throughout this work apply respectively to the British 

 Museum and the Museum of Practical Geology. 



