'84 HALKYARD, Fossil Foraminifera of the Blue Marl 



1 88. Marginulina apiculata, Reuss. 



Marginulina apiculata, Reuss, 1851. Haidinger's Naturw. 

 Abh., vol. IV, (1), p. 28, pi. I, fig. 18. 



Extremely rare. Only one small specimen found. 



189. Marginulina hamulus, Chapman. 



Marginulina hamulus, Chapman, 1893 ( T 8°4)> Journ. Roy. Micr. 

 Soc, p. 161, pi. IV, fig. 13a, 



Very rare, two specimens found. One in Gathering No. 

 i, the other in No. 8. 



190. Marginulina costata (Batsch.) 



Nautilus {Orthoceras) costatus, Batsch, 1791, Conch. Seesandes, 



pi. I, fig. ia, g. 

 Marginulina costata, Brady, 1884, Chall. Rep., p. 528, pi. LXV, 



figs. 10-13. 



This costate variety of M. glabra is very rare at Biarritz 

 and the specimens are small. 



191. Marginulina obliquestriata, Karrer. 



Marginulina obliquestriata, Karrer, 1861 (1862), Sitz., k. Ak. 

 Wiss. Wien, vol. XLIV, (1), p. 446, pi. I, fig. 8. 



Not so rare as the last species and the examples are larger. 



192. Marginulina hirsuta, d'Orbigny. 



Marginulina hirsuta, d'Orbigny, 1826. Ann. Sci. Nat., vol. 

 VII, p. 259, No. 5. 



Frequent in Gathering No. 4, less so in No. 7. The speci- 

 mens are small and have numerous segments. 



(D'Orbigny's figure of M. hirsuta (d'O. 1846. F.F.V. p. 69, 

 pi. Ill, figs. 17, 18.) shows a strongly hispid shell with minute 

 marginuline initial portion followed by a series of globular 

 chambers. The Biarritz specimens though sligntly curved have 

 no initial spiral, and are much nearer to d'Orbigny's figure of 

 Dentalina floscula (d'O. 1846 F.F.V. p. 50. pi. II, figs. 16, 17.) 

 though slightly longer and with more numerous chambers. D. 

 floscula is, as d'Orbigny has pointed out, closely allied to N. 

 hispida from which it differs only in its curvature. Halkyard's 

 specimens should we think be assigned to N. hispida d'Orbigny.) 



