112 FORAMINIFERA OF THE CRAG. 



the modification of the planulate form. In other words, those with concave 

 chambers are mostly divisible into either canaliculaia, d'Orb., or dorsata, Reuss. 



Occurrence. — Spiroloculina dorsata (limbata, Bornemann) occurs rather com- 

 monly in all the great oceans, as well as in the Mediterranean and Red Seas, in 

 depths not exceeding 400 fathoms. Fossil specimens are recorded from the 

 Miocene of Vienna and Muddy Creek (Victoria), the Oligocene of Herrasdorf, 

 and the Pliocene of Garrucha (South Spain) and St. Erth. In the Crag we find 

 it in every locality examined, except Aid borough. 



5. Spiroloctjlina nitida, d'Orbigny, 1826. Variety with a keel. Plate V, fig. 3; 



Woodcut, fig. 6. 



Spiboloculina nitida, d'Orb., 1826. Ann. Sci. Nat., vol. vii, p. 298, No. 4 



(Soldani, vol. i, part 3, p. 229, pi. civ, 

 figs. //, mm ?). Acute oval variety. 

 rotunda, 1 d'Orb., 1826. Ann. Sci. Nat., vol. vii, p. 299, No. 14 



(Soldani, vol. i, part 3, p. 229, pi. cliv, 

 tig. hh). Circular variety. 

 nitida, Terquem (after d'Orbigny's unedited drawings), 1878. 

 Mem. Soc. Geol. France, ser. 3, vol. i, art. 

 3, p. 52, pi. x, fig. 4 (chambers narrow) ; 

 and 1882, vol. ii, art. 3, p. 157, pi. xxiv, 

 fig. 16 (outside chambers large). 

 kotunda, Terquem (after d'Orbigny's unedited drawings), 1878 

 Ibid., ser. 3, vol. i, art. 3, p. 54, pi. x. 

 fig. 10. Rather thicker than Soldani's 

 figures quoted by d'Orbigny. 

 No. 556, von Schlicht, 1870. Foram. Septar. Pietzpuhl, p. 98, 



pi. xxxvii, figs. 30 — 32 (variety). 

 nitida, Parker, Jones, and Brady, 1871. Ann. Mag. Nat. Hist., 



ser. 4, vol. viii, p. 248, No. 140, 

 pi. viii, fig. 24. 

 hotundata, Parker, Jones, and Brady, 1871. Ibid., No. 142, pi. 



viii, tig. 25. 

 infra-OOLITHICa, Terquem, 1874. Foram. Syst. Oolith., p. 323, 



pis. xxxiv and xxxv, figs. 

 1—12. 

 iNTouTA, Ter<[uem, 1874. Ibid., p. 325, pi. xxxv, figs. 9, 10. 

 veemifobmis, Terquem, 1874. Ibid., fig. 8. 



1 The name "rotunda" ie preferable in one respect, but nitida (the oval form) came first in 

 d'Orbigny's naming. 



