no. 16083. FORAMINIFERA FROM THE HAWAIIAN ISLANDS—BAGG. 161 
PULVINULINA CRASSA (d’Orbigny). 
Rotalina crassa D’ORBIGNY, Mem. Soc. Geol. France, IV, 1840, p. 32, pl. 111, 
MS CO Th 
Described in the Cretaceous but not in succeeding formations. 
Occurs in bottom dredgings at great depths as well as in shallower 
waters and over a wide area of distribution. Stations H. 4430, H. 
4555, H. 4566, H. 4571, H. 4585, and H. 4590 of the Albatross cruise. 
PULVINULINA ELEGANS (d’Orbigny). 
Rotalia elegans D’ORBIGNY, Ann. Sci. Nat., VII, No. 54, 1826, p. 276. 
One of the most beautiful of all Pulvinulinw and of very large 
size. It is a comparatively shallow-water type, while its related 
form, Pulvinulina partschiana, 1s a deep-water species. Iound 
rather abundant at Stations D. 4174, H. 4480, H. 4502, H. 4508, 
H. 4555, Hi. 4567, Hi. 4571, Hi. 4585, and H. 4696. 
PULVINULINA GILBERTI Bagg, new species. 
From the dredging of Station 4567 I find two specimens of Pulvi- 
nulina which appear to be new. The test is highly vaulted upon the 
inferior side, with deeply sunken septa which extend from the mar- 
gin to the umbilicus in an almost straight line, as in Pulvinulina 
canariensis VOrbigny, which this species somewhat resembles. The 
segments are, however, more compactly built and the aperture, a neatly 
shaped arch, les midway between the periphery and the umbilicus 
upon the inferior surface. The superior surface, instead of being 
vaulted as in P. canariensis, 1s almost complanate and the periphery 
is almost keeled, being quite sharp and distinct, although somewhat 
lobulated on the last two chambers of the ultimate whorl. There are 
five segments visible in the last convolution and they are equally dis- 
tinct upon both surfaces. (See Plate V, figs. 11-15.) 
The shell is very minute and firmly built. It has a slight resem- 
blance to Truncatulina dutemplec (VOrbigny), but the margin is 
sharp and more angular in the present form, and the septal lines 
upon the inferior surface are much more depressed and the chambers 
more inflated. It is somewhat doubtful whether the present form 
should be considered a distinct species or only a variety of Pulvi- 
nulina menardi, which it resembles. It is much smaller than P. me- 
nardii, much more vaulted upon the inferior surface, and a little more 
closely involute. The septal depressions also are strong, deeply 
sunken on the lower side, and extend straight to the center. Upon 
the superior side they are strongly curved as in P. menardii. There 
are five of these chambers in the final convolution. The ultimate 
chamber is largest and in its outline reminds one of the auriculate 
Proc. N. M. yol. xxx1v—08——11 
