BULIMINA ACULEATA. 163 



Characters. — Test triserial, tapering, with numerous rather inflated chambers ; 

 acute below, obtuse above. 



Occurrence. — Biilimina elegans is stated by Brady in the ' Challenger ' Report 

 to occur not uncommonly in the North and South Temperate Zones, at depths 

 ranging from 11 to 1630 fathoms. In the tables at the end of the ' Challenger' 

 Report no mention is made of the species. D'Orbigny's specimens were obtained 

 from the Adriatic, near Rimini. The geological range of B. elegans extends back 

 to the Chalk of Swanscombe and Taplow (Chapman). We have noticed no 

 occurrence of the species in Tertiary formations older than the Pliocene, in which 

 it has been recorded from the Italian beds. We have it in our own Collection 

 from the Scaldisian of Antwerp. 



In the Coralline Crag we have specimens from Sudbourne Hall and Broom Hill, 

 zone d ; Gedgrave, zone f ; and Aldborough, zone g. In the Upper Crag the only 

 record is from Chillesford, as indicated in the First Part of the Monograph. 



1*. BuLiMiNA ELEGANS, d' Orbignij, 1826. Var. Plate VI, fig. 19. 



BuLiMiNA ELEGANS [var.J, Brady, 1884. Report ' Challenger,' p. 398, pi. 1, figs. 



3, 4. 



Characters. — The specimen shown by PI. VI, fig. 19, is not so symmetrically 

 tapering a form as is usual with B. elegans. In this respect it does not resemble 

 Brady's figs. 1 and 2, but the more cylindric and clumsier figs. 3 and 4, which it 

 will be convenient to regard as a varietal form. 



Some closely related (zoologically identical) forms have been described and 

 figured by G. Stacbe (' Novara-Exped., Geol. Theil.,' vol. i, part 2, Paleontology, 

 1866, pp. 265-7, pi. xxiv, figs. 13 — 16), varying chiefly in respect to size, and 

 named Biolimina pupula, sp. n., ovata, d'Orb., var., aperta, sp. n., and propinqua, 

 sp. n. Of these B. pupula (fig. 13) is a short representative of our fig. 19, which 

 latter is intermediate to B. aperta and propinqua. 



Occurrence. — The figured specimen is from the Coralline Crag at Sudbourne 

 Hall, zone d. 



2. BuLTMiNA ACULEATA, d'Orbigny, 1826. Plate III, figs. 1, 2. 

 Part I, 1866, Appendix II, Table, No. 67. 



Polymorpha pineiformia, Soldani, 1791. Testaceogr., vol. i, part 2, p. 118, pi. cxxvii, 



fig. I and K (?) ; pi. csxx, fig. vv ; and 

 pi. cxxxi, fig. XX (?). 



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