BOLIVINA PUNCTATA. 167 



Virgulina Schreibersii, Schwager, 1877. Bollet. E. Com. Geol. Ital., vol. viii, 



p. 25, pi. o, fig. 39. 

 Schreibersiana, Brady, 1884. Report ' Challenger,' p. 414, pi. lii, 



figs. 1—3. 

 Schreibersi, Andreae, 1884. Abhandl. geol. Specialk. Elsass-Lothr., 



vol. ii, pt. 3, p. 213, pi. ix, figs. 8, 9. 

 Schreibersii, Malagoli, 1887. Atti Soc. Nat. Modena (Rend.), ser. 3, 



vol. iii, p. 108, pi. i, fig. 5. 



— Schreibersiana, Brady, Parker, and Jones, 1888. Trans. Zool. Soc, 



vol. xii, part 7, p. 220. 

 Egger, 1893. Abh. k. Bay. Ak. Wiss., vol, xviii, 

 part 2, p. 290, pi. viii, figs. 93 & 95. 



— Goes, 1S94. K. Sv. Yet.-Akad. Handl, vol. xxv, No. 9, 



p. 48, pi. ix, figs. 459, 461—472. 



Characters. — This specimen has a rather rough surface, apparently from the 

 wearing away or the decay of the shell ; the smaller end in particular may have 

 become rounded by the loss of the sharp apex common in the species. Compared 

 with Czjzek's figure 21, this individual bears a strong likeness to the type in the 

 arrangement of chambers, although it differs in being thick with a subovoid 

 outline. Its long inflated chambers, variously arranged, parallel with the axis of 

 the shell or nearly so, are characteristically typical. 1 



The elongate forms of Virgulina Schreibersiana have been abundantly 

 illustrated by the authors above referred to, but the shorter and thicker 

 individuals have been rarely figured. Dr. A. Goes's fig. 464 is one of the few of 

 this kind. 



Occurrence. — Virgulina Schreibersiana is one of the most common of the 

 Foraminifera, and is found in nearly ^11 seas, and at all depths down to 3000 

 fathoms. It is common in the high latitudes of the Northern Hemisphere ; but it 

 has not apparently been recorded from correspondingly high latitudes of the 

 Southern Ocean. 



Its earliest recorded occurrences in the fossil condition are in the Chalk of 

 Swanscombe and Taplow. We have not noticed its occurrence in the Eocene, 

 but it has been recorded from the Oligocene of Blsass, from the Miocene of 

 Italy and Vienna, and from the Pliocene of Italy and St. Erth. 



The variety obesa, figured PL VI, fig. 20, is from the Coralline Crag of 

 Sudbourne Hall, zone d. 



i ' 



Annals Mag. Nat. Hist.,' ser. 4, vol. x, 1872, p. 186. 



