402 
THE VOYAGE OE H.M.S. CHALLENGER. 
mina eocena, the drawing of which is almost an exact counterpart of our figures of 
the present species, is from the Lower Tertiary deposits of Gran in Hungary, and Eeuss’s 
Bulimina imbricata is from the Chalk-marl of Lemberg. 
Bulimina subornata, n. sp. (PI. LI. fig. 6, a.b.). 
Test oblong-ovate ; resembling that of Bulimina pupoides in general form and 
segmentation ; the earlier chambers ornamented externally with raised longitudinal 
costae ; the aboral extremity generally armed with a stout spine. Shell-wall con- 
spicuously foraminated. Length, -g\ffh inch (0 - 5 mm.). 
Bulimina subornata is a rare species, occurring only at two of the Challenger 
Stations, both in the Pacific, namely : — the Hyalonema-g round, south of Japan, 345 
fathoms, where it is tolerably plentiful, and off Aru Island, 800 fathoms. 
Bulimina elegantissima, d’Orbigny (PI. L. figs. 20-22). 
Bulimina elegantissima, d’Orbigny, 1839, Foram. Amer. Mbrid., p. 51, pL vii. figs. 13-14. 
„ „ Williamson, 1858, Rec. For. Gt. Br., p. 64, pi. v. figs. 134, 135. 
„ presli, var. elegantissima, Parker and Jones, 1862, Introd. Foram., Appendix, 
p. 311. 
„ pulchra, Terquem, 1882, Mem. Soc. gbol. France, ser. 3, vol. ii. Mbm. III. p. 114, 
pi. xii. figs. 8-12. 
The test of Bulimina elegantissima, as portrayed by d’Orbigny, is distinctly and 
regularly spiral. It consists of from two to three convolutions, the last of which occupies 
more than three-fourths of the visible shell. The chambers number from seven to ten 
in the final whorl ; they are long, in the direction of the axis of the test, narrow, 
and obliquely set, and the sutures are only slightly excavated. Williamson’s figures 
agree in all important respects with those accompanying the original description, the 
final convolution being represented of even larger proportionate size. Of the drawings 
given herewith, figs. 20 and 21 are from specimens exhibiting intermediate characters, 
not so pointed at the inferior extremity as d’Orbigny’s, but less obtuse than those selected 
by Williamson ; whilst fig. 22 is from a slightly irregular and misshapen example. 
Parker and Jones (Phil. Trans., vol. civ. p. 374, pi. xv. figs. 12-17) assign to the 
present species a series of specimens which, though they pertain to the same section of 
the genus, differ in many ways from the typical Bulimina elegantissima. In the speci- 
mens referred to the segments are short and broad, as compared with those of the type, 
the final convolution is seldom of the same preponderating size, and the aperture is 
inserted much further from the distal end of the test. Shells of this sort are much more 
common than those of the true d’Orbignian form, and they have since been made the 
basis of an independent species, Bulimina subteres. 
