Beport on Foraminifcra. By F. W. Millett. 689 



G. helicina (d'Orb.) Terrigi, 1889, Mem. E. Accad. Lincei, ser. 4, 

 vol. vi. p. 114, pi. vi. fig. 15. G. helicina (d'Orb.) Egger, 1893, 

 Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 370, pi. xiii. 

 tig. 52. G. helicina (d'Orb.) Silvestri, 1899, Mem. Pontif. Accad. 

 Nuovi Lincei, vol. xv. p. 264, pi. v. fig. 6. G. helicina (d'Orb.) 

 Fornasini, 1899, Mem. E. Accad. Sci. 1st. Bologna, ser. 5, vol. vii. 

 p. 583, pi. iii. figs. 11, 12. 



This appears to be the most unsatisfactory of all the forms 

 assigned to the genus Globigerina ; and, as shown by the " Planches 

 inedites," d'Orbigny himself was not quite clear as to its characters. 

 Brady's description of it as a " Globigerine shell of the ' rubra ' 

 type, with the addition of an inflated chamber at two opposite 

 points of its periphery," is perhaps the best definition of the 

 normal form ; but, judging from the published figures, and the 

 examination of actual specimens, it is frequently nothing more 

 than an irregular aggregation of globose chambers, two or more 

 of which exhibit an exterior arched aperture. 



In the Malay Archipelago, the form in very rare ; but it occurs 

 in both areas. 



Brady writes, " Globigerina helicina is a comparatively rare 

 form. Occasional specimens have been met, with at nine or ten 

 ' Challenger ' Stations, scattered over the North and South Atlantic 

 and in the South Pacific ; to which may be added, on the authority 

 of Soldani, certain points in the Mediterranean and the Adriatic." 

 Egger reports it from nine ' Gazelle ' Stations, extending from the 

 west coast of Africa to the Fiji Islands. 



Globigerina eequilatcralis Brady. 



Globigerina eequilatcralis Brady, 1879, Quart. Journ. Micr. Sci., 

 n.s., vol. xix. p. 71 ; and 1884, Chall. Eept., p. 605, pi. lxxx. 

 figs. 18-21. G. eequilatcralis (Brady) Wright, 1886, Proc. Belfast 

 Nat. Field Club, 1884-85, App. ix., 1886, p. 332, pi. xxvii. fig. 9. 

 G. cecquilateralis (Brady) Chapman, 1892, Quart. Journ. Geol. Soc, 

 vol. xlviii. p. 517, pi. xv. fig. 14. G. eequilatcralis (Brady) Egger, 

 1893, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. p. 364, 

 pi. xiii. figs. 5-8. G. eequilatcralis (Brady) Goes, 1894, K. Svenska 

 Vet.-Akad. Handl., vol. xxv. p. 86, pi. xiv. fig. 767. G. cequilate- 

 ralis (Brady) Madsen, 1895, Medd. Dansk Geol. Forening, No. 2, 

 p. 210, pi. fig. 5. G. eequilatcralis (Brady) Chapman, 1896, Journ. 

 E. Micr. Soc, p. 589, pi. xiii. fig. 7. G. cequilateralis (Brady) 

 Silvestri, 1899, Mem. Pontif. Accad. Nuovi Lincei, vol. xv. p. 265, 

 pi. v. fig. 8. G. eequilatcralis (Brady) Fornasini, 1899, Mem. E. 

 Accad. Sci. 1st. Bologna, ser. 5, vol. vii. p. 580, pi. iv. figs. 3, 4. 

 G. eequilatcralis (Brady) Flint, 1899, Eep. U.S. Nat. Mus. for 1897 

 <1899), p. 323, pi. lxx. fig. 3. G. eequilatcralis (Brady) Ehumbler, 



