320 Transactions of the Society. 



40. PeneropUs pert its as var. cylindraceus Lamarck. 



Nautilus (/ ituus) arietinus (pars) Batsch, 1791, Conch. Seesandes, p. 4, pi. vi. 



fig. 15d,e,f. 

 SpiroKna (Spirolinites) cylindracea Lamarck, 1804, Ann. du Museum, vol. v. 



p. 245, No. 2. 

 SpiroKna cylindracea (Lamarck) d'Orbigny, 1826, Ann. Sci. Nat., vol. vii. 



p. 286, No. 1 ; Modele No. 24. 

 Spirolina austriaca d'Orbigny, 1846, Foram. Foss. Vienne, p. 137, pi. vii. 



figs. 7-9. 

 PeneropUs pertusus (Forskal) Brady, 1884, Foram. ' Challenger,' p. 205, pi. 



xiii. figs. 20, 21. 



Fossil only. Numerous fragments, a few typical specimens. 



41. PeneropUs pertusus var. carinatus d'Orbigny. 



PeneropUs carinatus d'Orbigny, 1839, Foram. Amer. Muriel., p. 33, pi. iii. 



figs. 7,8. 

 PeneropUs dubius d'Orbigny, 1839, Foram. Cuba, p. 79, pi. vi. figs. 21, 22. 

 PeneropUs pertusus (Forskal) Brady, 1884, Foram. ' Challenger," p. 205, pi. 



xiii. fig. 14. 



Fossil only, one small specimen. 



Note. — The specimens of PeneropUs are, with few exceptions, 

 much worn and broken. They closely resemble in appearance the 

 specimens figured by Terquem in his Memoir on the Foraminifera 

 of the Eocene of the Paris Uasin, and have doubtless been derived 

 from shell sands of similar age. All the specimens (except per- 

 haps those of var. cylindraceus), are of small size compared with 

 those found in recent sub-tropical gatherings. 



Millett's record, " common." 



Orbitolites Lamarck. 



42. Orbitolites duplex Carpenter (rnacropora Ehrenberg sp. ?) 



Orbulites rnacropora (?) Lamarck, 1816, Anim. Sans Vert., vol. ii. p. 197, 

 No. 5 (fide Carpenter). 



Orbitolites rnacropora (?) Goldfnss, 1826, Petrefacta Germanise, etc., vol. i. 

 p. 41, pi. xii, fig. 8 a, b. 



Orbitolites " duplex type," Carpenter, 1856, Phil. Trans., p. 120, pi. v. fig. 10, 

 pi. ix. fig. 10. 



Orbitolites duplex Carpenter, 1883, Report on Genus Orbitolites, Zool. 'Chal- 

 lenger ' Exp., part xxi. p. 25, pi. iii. figs. 8-14 ; pi. iv. figs. 6-i0 ; 

 pi. v. figs. 1-13. 



Ditto. (Carpenter) Brady, 1884, Foram. ' Challenger,' p. 216, pi. xvi. fig. 7. 



Fossil. Fragments only, of frequeut occurrence, but owing to 

 the presence of the aperture on many of the fragments it is 

 possible to identify them as belonging to this species. Carpenter 

 supposes the Orbulites m-acropora of Lamarck to be identical with 

 Orbitolites duplex, in which case, its geological history will extend 

 back as far as early Tertiary times, otherwise the species is only 



