90 Goiis, reticulakian rhizopoda of 1'HE caribbean sea. 



Globigerina universa dOrb. 



Tab. VI, fig, 194. 



This species has received a smaller nuinber of names thaii inost of the other 

 species of this class, owing to its simple and nearly uniform structure in all seas and 

 in those geological strata, where it has appeared. 



()rbidina Neojurensis Kärr. from the secondary strata of Austria is distinguished 

 by a strongly reticulated surface, but this feature is common within the whole genus 

 and is not a mark of essential importance. 



A twinform is sometimes met with, which has been identified with Glob. bilohata 

 ])'Orb. from the tertiary strata ;it Vieiina. But D'Oi;BiGNy's form is provided with a 

 lateral aperture like that in the ordinary Glob. bulloides. Our twinform is destitute 

 of such an orifice, in place of which it is provided with the usual large pores, scat- 

 tered between the finer ones. 



Globigerina bipartita Rss., from the Antwerpen.-Crag may belong to this form. 



Globigerina universa of different sizes and thinness of shell is very common on 

 both sorts of bottom at our localities. 



The twinform, hg. 194, is very rare in the coralline-gravel. 



Syn. Orbulina universa d'Orb., 1839, Cuba p. 3, t. 1, fig. 1; 1844, lies Caiiaiies p. 122, t. 1, 



fig- 1; For. tevr. Vicniio p. 22, t. 1, fig. 1. 



>> » Bail., 1850, Microsc. Exam. of Souiuliiigs; Siiiithsoii. Contrib. 2. 3, p. 9, 



fig. 1. 



» » Costa, 1854, Pal. Nap. 2, t. 11, fig. 5. 



« tuberculata, granulata C!osta, ibid. fig. 1 — 2; t. 15, fig. 14. 



" granvilata (i impressa, / areolata ibid. t. 11, figg. 3 — 4. 



)) universa Williams., 1858, ]^rit. rec. Förf. p. 2, fig. 4 (uarcnacea'). 



» Neojurensis Kaur., 1867, For. Österr.; Wien. Ak. Sitz.-Ber. 1. 55, p. 308, t. 3, fig. 10. 



" universa Wai.lich, 1876, Deepsea Eesearclies fig. 13. 



Globigerina universa Bråd., 1879, Notes on Het. llhizop. »Clialleng.« Exp.; Qu. Jonrn. Micr. So. 



(n. Ser.) 75, p. 289. 



Globigerina bulloides dOrb. 



Tab. VI, figg. 195 — 207. 



As witli most other species of this class Glob. bulloides also has its tiny pigmy- 

 form, that in some respect deviates from the type. It is usually of more regular 

 growth ; the first chambers are extremely small (about 0.02 mm.) and with 5 or 6 in 

 each convolution; the pores are generally finer than in the larger and coarser form, 

 It was distinguished by d'Oi;bigny as Glob. cretacca and Glob. Dutertrei; Glob. dubia 

 Egger. 



The stoutly developed form of Glob. bulloides commences its life with niuch larger 

 ;iih1 fcwer chiimbcrs in each convolution. It is often very int'gular, the chambers 



