GOES: FORAMINIFERA. 85 
timos the aperture is represented by one or two undulated irregular slits. The 
extent of the last segment's prevalence over the penultima one is also subject to 
some variableness. As a rule the surface is provided with a high gloss, but old 
and stout samples are often without this lustre, 
Caribbean Sea. 300-1500 fathoms. 
Pacific. 700-1300 fathoms; not common, 
ALLIED Form : 一 
B. irregularis v'On». 
D. irregularis D'ORB., 1839, Voy. Amer. Mérid., p. 67, Pl. VIII. Figs. 20, 21. 
. irregularis BR., 1884, Chall. Rep., IX. p. 140, PI I. Figs. 17, 18. 
ventricosa Reuss, 1867, Steinsabz. Wieliczka, Wien. Ak. Sitz. Ber., LV. p. 69, 
Pl. I. Fig. 9. 
B. grinzingensis Karrer, 1877, Hochquellen Wasserleit, K. K. geol. Reichsanst. 
Oesterr., IX. p. 375, Pl. XVI. Fig. 8. 
An ovoid and marginally somewhat compressed form of B. sphera, the 
apertural end being a little tapering and provided with a short semicircular 
aperture. It is sometimes triloculine, and then often more flattened from 
> d 
the margin. 
Pacific. 885 fathoms; scarce. 
Caribbean Sea. 382 fathoms ; scarce. 
B. bulloides var. simplex »’Orn. 
B. simplex v'ORB., 1846, Bass. tert. Vienne, p 264, Pl. XV. Figs. 25-27. 
Miliol. ringens Go&s, 1882, Ret. Rhizop. Caribb. Sea, Sv. Vet. Ak. Hdl. XIX. 4, 
p. 131, Pl. X. Figs. 361, 362. 
D. ringens Br., 1884, Chall. Rep., IX. p. 142, Pl. II. Figs. 7, 8. 
B. simplex Gots, 1894, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl, XXV. 9, p. 116, 
Pl. XXII. Figs. 872-882, Pl. XXIII. Figs. 886, 887. 
Has been referred to B. ringens by several authors. But since Schlumberger 
has shown that the recent form differs slightly from the fossil form of Lamarck, 
there may be some reason to assign this variety to one of the many identical forms 
recorded by d'Orbigny, Reuss, ete. ; for instance, B. simplex of d'Orbigny, some- 
what distinet by its crescentic elongated aperture, usually of a long fibula form. 
Caribbean Sea. 200-1500 fathoms; not rare. 
ALLIED Form :一 
B. abyssorum Gois. Plate IX. Figs. 1, 2. 
D. abyssorum Go&s, 1894, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, 
p. 118, Pl. XXIII. Figs. 888, 889. 
A nearly globular or transversely ovoid form of B. simplex, often without 
prominent margin; its height (vertical diameter) often a little surpasses both 
the length and breadth. The aperture is often an angular bent or kneed 
narrow slit, sometimes much produced in length and irregularly kneed. 
