REPORT ON THE FORAMINIFERA. 
593 
ing the earlier chambers. When this is the case the aperture takes a similar form and 
position to that of Globigerina cequilateralis. 
The abnormal and irregular specimens classed by Reuss under the generic or sub- 
generic term Rhynchospira, 1 examples of which are portrayed in Pl. L XX XT. figs. 6,7, 
have not been included in the foregoing summary. Such shells are comparatively rare. 
They consist of acervuline masses of Globigerine chambers arranged without apparent 
order ; and to all appearance they are nothing more than monstrous or wild-growing in- 
dividuals, though it is difficult to say to which precise variety they are referrible. 
Of the species enumerated, all the more important, except Globigerina jpachy derma, 
have been found living at the surface of the sea. Some doubt attaches to the occurrence 
of Globigerina cretacea in the recent condition ; and Globigerina digitata, Globigerina 
helicina, and Globigerina linnceana are, under any circumstances, exceedingly rare in 
comparison with most of the other recent forms. Apart from these, which scarcel} T affect 
a general statement, the whole series pertains to the pelagic fauna of mid-ocean. 
The geographical distribution of the genus is world-wide. At every latitude, indeed 
in almost every sea in which the tow-net and the sounding-line have been employed, 
Globigerince have been brought to light ; and over large areas they exist in a profusion 
far outweighing in the aggregate all other organisms whatsoever. So far as is known, the 
earliest appearance of the type is in certain calcareous rocks of Jurassic age, in Switzerland 
(Haeusler) 2 , but it was neither common nor widely diffused until the latter half of the 
Cretaceous period. It is represented in the Gault, and abundantly in the Chalk, and 
reappears at every stage of the Tertiary epoch. 
Globigerina- bulloides, d’Orbigny (Pis. LXXVTL, LXXIX. figs. 3-7).. 
“ Polymorjtha Tuberosa et Globulifera,” Soldani, 1791, Testaceograpliia, vol. i. pt. 2, p. 117, 
pl. cxxiii. figs. H. I. O. P. 
“Testee tuberoses,” &c., Id., 1798, Ibid., vol. ii. p. 20, pl. vi. figs, del., ee. 
Globiejerina bulloides, d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. p. 277, No. 1. — Modeles, No. 17 
(young), and No. 76. 
„ „ Id. 1839, Foram. Amer. Mfirid., p. 37. 
„ „ Id. 1839, Foram. Canaries, p. 132, pl. ii. figs. 1-3, 28. 
„ hirsuta, Id. Ibid. p. 133, pl. ii. figs. 4-6. 
,, siphonifera, Id. 1839, Foram Cuba, p. 95, pl. iv. figs. 15-18. 
„ bulloides, Id. 1846, For. Foss. Vien., p. 163, pl. ix. figs. 4-6. 
„ concinna , Reuss, 1849, Denkschr. d. k. Akad. Wiss. Wien, vol. i. p. 373, pl.xlvii. fig. 8. 
,, diplostoma, Id. Ibid. p. 373, pl. xlvii. figs. 9, 10. 
,, depressa, Ebrenberg, 1854, Mikrogeologie, pl. xix. fig. '92. 
,, foveolata (pars), Id. Ibid. pl. xxii. fig. 74. 
1 A manuscript name, said to have originated with Ehrenberg ; employed by Karrer, on the authority of Reuss, 
for one of these wild-growing forms, Globigerina \Rhynchospim] glomerata, ,(Geol. d. Iv. b.-J. "Wasserleitung, p. 387, 
pl. xvi. b., fig. 53). 
2 Reuss mentions a fossil resembling Globigerina triloba, from the Trias of St. Cassian, but with doubt apparently 
as to its real affinity. — Sitzungsb. d. k. Ah. Wiss. Wien, 1868, vol. lvii. p. 105. 
