Foraminiferal Limestones, 229 



Gypsina glohdus (Eeuss). 



{Jeriopora globulus, Reuss, 1847, Haidinger's Naturw. Abhandl., vol. ii, p. 33, 



pi. T, fig. 7. 

 Orbitolina Icevis, Parker & Jones, 1860, Ann. Mag. N"at. Hist., ser. in, vol. vi, 



p. 31, No. 7. 

 Tinoporus pilaris, Brady, 1876, Ann. Soc. Malac. Belg., vol. vi, p. 103. 

 Tinoporus baculatns (Montfort), var. sphceroidalis, Carter, 1877, Ann. Mag. Nat. 



Hist., ser. iv, vol. xix, p. 215, pi. xiii, figs. 18, 20. 

 Gypsina vesicularis (Parker & Jones), var. sphceroidalis. Carter, 1877, Ann. Mag. 



Nat. Hist., ser. iv, vol. xx, p. 173. 

 Gypsina globulus (Reuss), Brady, 1884, Rep. Chall., vol. ix, p. 717, pi. 101, fig. 8. 



This ■well-known species is frequent in coral deposits thronghont 

 the Tertiaries and in recent times. Their circular sections are 

 numerously represented in this limestone. The ayerage diameter 

 of these specimens is about aV inch.. 



Amphistegina lessonii, d'Orbigny. 



A. lessonii, d'Orbigny, 1826, Ann. Sci. Nat., vol. vii, p. 304, No. 3, pi. xvii, 



figs. 1-4. 

 A. lessonii, d'Orbigny : Brady, 1881, Rep. Chall., vol. ix, p. 740, pi. Ill, 



figs. 1-7. 



This species is common in the sections now described, and it is 

 of fairly average size. A. lessonii occurs in many of the Tertiary 

 strata dating from the Eocene ; and it is common at the present 

 time in tropical and sub-tropical seas. 



Seterostegina depressa, d'Orbigny. (PL XX, Fig. 1.) 



if. depressa, d'Orbigny, 1826, Ann. Sci. Nat., vol. vii, p. 305, pi. xvii, figs. 6-7 ; 



Modele, No. 99. 

 H. antillarum, d'Orbigny, 1839, Foram. Cuba, p. 121, pi. vii, figs. 24, 25. 

 H. helvetica, Kaufmann, 1867, Geol. Beschreib. des Pilatus, p. 153, pi. ix, 



figs. 6-10. 

 H. depressa, d'Orbigny: Brady, 1884, Rep. Chall., vol. ix, p. 746, pi. 112, 



figs. 14-20. 



ITumerous examples of the above species appear in the sections 

 of limestone No. 2. They are of moderately large size, averaging 

 one-sixth of an incb in width. These specimens also exhibit the 

 large flange -like portion strongly developed ; and which, when 

 isolated from the major part of the shell, may easily be mistaken 

 for one of the thick Cycloclypeince. The specimens seen in these 

 sections also show the transverse subdivision of the chambers into 

 chamberlets, thus being distinguished from the closely allied 

 OpercuUna. 



Orlitoides {DiscocycUna) dispansa (Sowerby). (PL XX, Fig. 1.) 



Lycophris diapansus, Sowerby (1837), Trans. Geol. Soc. Lond., ser. ii, toI. 

 (1840), pp. 327 and 718, pi. xxiv, figs. 16 and 16a, b. 



