L2ZQ PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
SPIROLOCULINA TENUIS (Czjzek). 
Quinqueloculina tenwis CzJZEK, Haidinger’s Nat. Abhandl., IT, 1847, p. 149, 
pl. x11, figs. 31-34. 
Inhabiting all great oceans. Abundant in the South Pacific but 
less common in the North Pacific, and known from depths of a few 
fathoms down to 2,750. Professor Brady writes that the finest speci- 
mens come from moderate depths. Fossil in the Austrian Tertiary. 
Occurs at Stations D. 4000, D. 4017, H. 4440, H. 4571, H. 4590, and 
H. 4696. 
Genus MILIOLINA. 
MILIOLINA BICORNIS var. ELEGANS Williamson. 
Miliolina bicornis var. elegans WILLIAMSON, Recent Foram. Gt. Britain, 1858, 
Ds OS, Die van, te l9Go: 
Differs from the type J/. bicornis in the regular symmetry of its 
chambers and in the uniform size and regular parallelism of the sur- 
face grooves. 
This striate form is rarely found at depths greater than 50 fath- 
oms. The method of growth as shown by Schlumberger is in accord. 
with that of d’Orbigny’s genus Adelosina, in which the megasphere is 
completely enveloped by the first chamber, which becomes lenticular. 
It then passes through the biloculine, milioline, triloculine, quadriloc- 
uline, and quinqueloculine stages. Our form very closely represents 
this quinqueloculine form and the aperture is in the end on a con- 
siderably lengthened tube. Unfortunately we have but one broken 
specimen of this interesting species. 3 
Mihiolina bicornis is fossil in the London clay and the Paris Basin 
Kocene. | 
MILIOLINA CUVIERIANA (d’Orbigny). 
Quinqueloculina cuvieriana D’ORBIGNY, Foram. Cuba, 1839, p. 164, pl. Xt, 
figs. 19-21. 
Test consisting of five segments with sharp or subcarinate margins 
and smooth unornamented surface. It is the same as Y. lamarckiana 
figured on the same plate (figs. 14, 15). A shallow tropical water 
species particularly known around the region of Japan, the Phil- 
ippines, and the islands of the Eastern Archipelago. While it is one 
of the most common Milioline in the Albatross material, the number 
of specimens in each locality is small. Found at Stations D. 4000, 
D. 4017, D. 4025, H. 4555, H. 4590, and H. 4694. 
