84 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
Has usually an oblong shape, but instances are not rare also of a nearly 
equilateral form. The few samples exhibited in the “ Albatross ” collection are 
very small and extenuated. 
Pacific. 1218 fathoms; scarce. 
Caribbean Sea. 300 fathoms (Goés). 
M. consobrina D'Or. 
Triloculina consobrina b'OrB., 1846, Bass. tert. Vienne, p. 277, Pl. XVII. Figs. 10-12. 
Triloculina angustissima, nitens, pygmæa, Reuss, 1849, Neue For. Oesterr., Wien. Ak. 
Dkschr., I. pp. 888-385, Pl. XLIX. Figs. 10, 18, Pl. L. Fig. 3. 
Triloculina nitida D'ORB., 1874, For. Iles Canaries, p. 141, Pl. III. Figs. 22-24. 
? Quinqueloc. Bosciana v'OrB., 1839, For. Cuba, p. 191, Pl. XI. Figs. 22-24. 
Gois, 1882, Ret. Rhizop. Caribb. Sea, Sv. Vet. Ak. Hdl., XIX. 4, Pl. IX. Fig. 928. 
In three of his works on Foraminifera d’Orbigny has given figures and 
descriptions of a set of Triloculine closely allied to Vermiculum oblongum of 
Montagu, not well distinguished either from the latter or from each other. 
M. consobrina of d'Orbigny represents a form of more linear and narrower 
shape than the commion oblonga, which is more oval in circumference. The 
antepenultima segment is usually not projecting but flush in the former. 
Our form from the Caribbean Sea is very slender and with nearly equal 
linear contour, very slightly compressed, thin-sbelled, and with an aperture 
very much like that of the consobrina of d'Orbigny. 
Length 0.80 mm.; breadth 0.20 mm. 
Caribbean Sea. Only one sample occurs in the “Albatross” collection; 
depth unknown. 
BILOCULINA. v’Orr. 
B. spheera v’Ors. 
B. sphera D'ORB., 1839, Voy. Amer. Mérid., V. p. 66, Pl. VIII. Figs. 13-16. 
B. globulus Bornem., 1855, Sept. Thon Hermsdorf, Ztschr. deut. geol. Gesellsch., 
VII. p. 349, Pl. XIX. Fig. 3. 
B. globulus Reuss, 1870; Schlicht, Septar. Thon Pietzpuhi, Pl. XXXV. Figs. 30-82 
(not Reuss, Septarienth. Offenbach, Wien. Ak. Sitz. Ber., XLVIII. p. 40, Pl. I. 
Fig. 4, which is scarcely distinguishable from B. bulloides D'ORB., or from 
B. abyssorum Gots). 
Miliol. ringens var. Goiis, 1882, Ret. Rhizop. Caribb. Sea, Sv. Vet. Ak. Hdl., XIX. 4, 
Pl. X. Figs. 368, 369. 
B. sphera Br., 1884, Chall. Rep., IX. p. 141, Pl. II. Fig. 4. 
B. spheroides SonLume., 1880, Feuille Jeunes Natur. (Separ), XIII. p. 22, Pl. II. Fig. 3. 
Planispirina sphera SonLums., 1891, Biloc. grands fonds, Mém. Soc. Zoo]. France, 
IV. p. 190, Figs. 45, 40. 
B. sphera Goiis, 1894, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, p. 120, 
Pl XXV. Fig. 927. 
Exhibits an aperture usually of two forms ; the commonest is that of a trans- 
verse somewhat bended slit, the other is that of a V-formed fissure; some- 
