AND MOLLUSCA FROM ANGOLA, PORTUGUESE WEST AFRICA. 



563 



List of Cretaceous Mollusca {excluding Cephalopoda), etc., from Angola, 

 collected by Prof Gregory and Mr E. Robins. 



Genera and Species. 



Brachiopoda — 



* Terehratula depressa, Lamarck . 



Pelecypoda — 



Exogyra cf. flabellatu, Goldfuss 

 Neitliea xquicostata, Lamarck . 



* ,, angoliensis (sp. nov.) . 



. * ,, quadricostata, J. Sowerby 



* ,, tricostata, Coquand 



* Lima cf. itieriana, Pictet and Roux 

 Vulsella sp. ( = MocUola) . 



* Trigonarca cf. ligeriensis, Orbigny 

 cf. diceras, Seguenza 



* Trigonia creuulata, Lamarck 



* Anthonya cf. baudeti, Coquand 



* Trachycardium cf. syriacum, Conrad 



* Panopeea cf. plicata, J. de C. Sowerby 



* Pholadomya cf. vignesi, Lartet . 

 Toucasia sp. 



Gastropoda — 



* Tylostoma globosum, D. Sharpe 



* Mrhilaia cf. nerinseformis, Coquand . 



* Hipponyx sp. . 



* Akera gregoryi (sp. nov.) . 



Geological 

 Distribution. 



A ptian-Vraconnian 



Cenomanian-Turonian 



Vraconnian 



Albian-Cenomanian 



Cenomanian 



A lbian-Cenomanian 



Vraconnian 



Cenomanian 



Aptian-Cenomanian 



Cenomanian-Senonian 



Vraconnian 



Cenomanian-Turonian 



Cenomanian 



Vraconnian 





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Note. — The asterisks (*) to the left of the above names indicate new records for the Cretaceous of Angola. 



Description of the Specimens. 



BRACHIOPODA. 



Fam. TEREBRATULID.E. 



Terehratula depressa, Lamarck. (PI. I, fig. 1.) 



Terehratula depressa, Lamarck: Hist. Nat. Anim. sans Vert., 1819, vol. vi, part 1, p. 249; Davidson: 

 Ann. Mag. Nat. Hist., 1850, ser. 2, vol. v, pi. xiii, fig. 15, p. 435; British Cretaceous Brachiopoda, 

 Mon. Pal. Soc, 1854, pi. ix, tigs. 9-24, p. 70; Suppl. 1874, pi. iv, figs. 1-10, p. 40. 



Remarks. — -A single specimen of this species is all that is represented in the 

 collection. It exhibits a good external view of the ventral or pedicle valve, 

 with only the crushed remains of the brachial or dorsal valve, which is too much 

 mutilated for the determination of characters. The ventral valve is very shallow 



