138 Appendix. 



FORAMINIFERA FROM THE EOCENE CLAY OF NIGERIA. 



PLATE 12. 



The subjoined list of species must not be taken as in any way 

 approaching completeness, or even as giving the representative forms to be 

 found in the deposit, but it may be taken as a preliminary list of the typical 

 and common forms. The sample of material submitted to us which had been 

 collected by Sir Frederick Lugard, G.C.M.G., was very small, not more than 

 50 c.c. in all ; and there is little doubt that the examination of a sufficient 

 quantity of the clay would give very extended results. It was obtained from 

 the same beds at Ameki in the district of Omobialla, situated in the Southern 

 Provinces of Nigeria, which yielded the Mollusca described in this Bulletin. 



At the same time, the sample, limited as it was, has furnished a few very 

 distinctive and interesting forms, one of which, at least, Virgulina schreibersiana 

 var. marginata may safely be described as new to science. The two Miliolids, 

 M. sulcifera (Roemer) and M. bicarinella (Reuss) are interesting, as not 

 having been recorded again since they were first described and figured by their 

 authors. The occurrence of Peneroplis carinatus, d'Orbigny, which we 

 recorded from the Eocene of Selsey Bill 1 is noteworthy, as also is the fact 

 that the only representative of Bulimina is found in B. fusifortnis, Williamson, 

 which must be abundant in the deposit. We record also the typically cold-water 

 species Globigerina pachyderma (Ehrenb.), which also occurred at Selsey. 

 The Nonioninae are interesting but involved, the species running into one 

 another and exhibiting an extraordinary tendency to limbation of the sutures ; 

 this tendency is noticeable also in other species, notably in Pulvinulina 

 brongniartii (d'Orb.) and Bolivina textilarioides, d'Orb. 



The facies indicates shallow water and a temperate climate. Peneroplis, 

 alone, indicates tropical or semi-tropical conditions and the single specimen 



1 E. Heron-Allen & A. Earland : " The Recent and Fossil Foraminifera of the Shore Sands at 

 Selsey Bill, Sussex": Journ. R. Micr. Soc., 1909, Part 3, p. 320. 



