48 Mr. F. Chapman on Foraminifera 



authors (de Koninck, 1883 j Whidborne, 1892 ; Hind, 1897) 

 for the Palaeozoic species. For the Triassic and Jurassic forms, 

 however, most authors have continued to use Macrodon ; on 

 account of this, Beushausen (1895), instead of accepting 

 Paralhlodon , changed Macrodon to Macrodus, in which lie 

 has been followed by Tornquist (1896). But the rules of 

 priority will not allow us to accept Macrodus. 



If the view that Grammatodon is synonymous with 

 Macrodon, Lycett (non Miiller), be accepted, then I think it 

 is clear that the former name must be used, since it is earlier 

 than either Paralhlodon or Macrodus. 



The references to the original descriptions of the genera 

 above mentioned are : — 



Macrodon. — Lycett, in Murchison's Geol. Cheltenham, ed. 2, 

 by Buckman and Strickland (1845), p. 98, pi. v. fig. 5. 

 Emended, Morris and Lycett, Mollusca Gt. Ool. (Pal. 

 Soc. Mon.) pt. ii. (1853) p. 48, pi. v. fig. 1. Non 

 Macrodon, J. Miiller, Archiv fur Anat. Physiol. &c. 

 Berlin (1842), p. 308. 



Grammatodon. — Meek and Hayden, Proc. Acad. Nat. Sci. 

 Philad. 1860, p. 419 (name only and type species) ; 

 " Palaeontology of the Upper Missouri," Smithsonian 

 Contrib. to Knowledge, vol. xiv. no. 172 (1864), p. 89, 

 pi. iii. fig. 9. 



Paralhlodon. — Meek and Hayden, Proc. Chicago Acad. Sci. 

 vol. i. 1866, p. 17 (nom. rnut.). 



Macrodus. — L. Beushausen, " Die Lamellibr. des rheinisch. 

 Devon," Abhandl. d. kbn. Preuss. geol. Landesanst. 

 N. F. Heft xvii. (1895), p. 36 (nom. mut.). 



Woodwardian Museum, 

 Cambridge. 



VII. — Foraminifera from the " Cambridge Greensand." 

 By Fkederick Chapman, A.L.S., F.R.M.S. 



Part I. 



In a former paper* I have dealt with the Ostracoda of the 

 Cambridge Greensand. 



The present account of the Foraminifera from the Cam- 

 bridge Greensand is the result of an examination of some 



* See this Magazine for October 1898, pp. 331-346. 





