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XV. — On some Cretaceous Brachiopoda and Mollusca from Angola, Portuguese 

 West Africa. By R. Bullen Newton, F.G.S., Geological Department, British 

 Museum.* Communicated by Professor J. W. Gregory, F.R.S. (With Two 

 Plates.) 



(MS. received June 2, 1915. Read June 28, 1915. Issued separately August 14, 1916.) 



CONTENTS. 



Introduction ........ 5gl 



Distribution Table ....... 5g3 



Description of Specimens : — 



Brachiopoda .......... 563 



Pelecypoda ............. 564 



Gastropoda ........ 576 



Explanation of Plates ............ 579 



Introduction. 



The following notes have been prepared as the result of a study of a small collection 

 of fossils belonging chiefly to the Pelecypoda and Gastropoda, which were obtained 

 by Professor J. W. Gregory, F.R.S. , from the Cretaceous rocks of the neighbour- 

 hood of Lobito Bay, situated to the north of Benguella, in the province of Angola. 

 At first sight the specimens appeared to be of too unsatisfactory a character for 

 determination, on account of their fragmentary condition, besides often consisting 

 of natural casts. From a closer examination, however, it has been possible to trace 

 some details of structure which have afforded clues to the identification of certain 

 genera and species, a record of which will assist in extending our present limited 

 knowledge of the Cretaceous conch ology of this region of Africa. During the 

 progress of these researches, a few further specimens from the same locality were 

 added to Professor Gregory's collection, having been specially obtained by Mr 

 E. Robins, of the Benguella Railway Company. So far as the literature of the 

 subject is concerned, we appear to be indebted to the memoirs of Professor Paul 

 Choffat t of Lisbon for most of our information on the Cretaceous fauna of Angola, 

 although reference should also be made to a small and important paper by 

 M. Stanislas Meunier J issued in 1888, which contains the earliest known figures of 



* Published by permission of the Trustees of the British Museum. 



t " Note preliminaire sur les Fossiles recueillis par M. Lourenco Malbeiro dans la province d' Angola," Bull. Soc. 

 Ge'ol. France, 1887, ser. 3, vol. xv, pp. 154-157 ; " Materiaux pour l'etude stratigraphique et paleontologique de la 

 province d' Angola," Mem. Soc. Phys. Hist. Nat. Geneve, 1888, vol. xxx, No. 2 ; " Nouvelles denudes sur la zone 

 littorale d'Angola/' Contrib. Ge'ol. Colonies Portugaises Afrique — Com. Sen. Ge'ol. Portugal, 1905. 



I "Contribution a la geologie de 1' Afrique occidentale," Bull. Soc. Ge'ol. France, 1888, ser. 3, vol. xvi, pi. 1, 

 figs. 1-5, pp. 61-63. 



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