Henry B. Brady — Notes on Cretaceous Foraminifera. 535 
Quinqueloculina agglutinans of d’Orbigny both in shell-texture and in 
general contour. The late Professor Costa figures such a form 
(Paleont. del. Regno di Napoli, pt. 2, pl. 26, fig. 5), tliough in some- 
what clumsy fashion, under the name above employed. 
Lagena marginata . — Two or tbree pretty distinct forms are in- 
cluded under this specific name. The varieties of L. marginata 
have not as yet been sufficiently worked out. 
Globigerina sacculifera, nov. — This is a somewhat important modi- 
fication of the Globigerine type, and one that appears almost to have 
escaped attention hitherto. Dr. Carpenter figures a poor specimen 
(‘ Introduction,’ pl. 12, fig. 11) under the name Globigerina helicina, 
d’Orb., but the figures in Soldani’s ‘ Testaceographia,’ on which 
d’Orbigny founded that species, pertain to a very different form, the 
name for which cannot be spared. Reserving details respecting 
the subordinate groups into which the genus may be divided for 
another opportunity, it will suffice to state here that the trivial name 
sacculifera has been applied to a set of Globigerina, in which the 
terminal chamber or chambers take an elongate, poucb-shaped and 
usually pointed contour, and always present at least one large 
aperture on the superior or spiral surface. Such forms are common 
and grow to considerable size, especially in deep water south of 
the Equator. 
Pulvinulina Menardii, var. tumida, nov. — A tliick, oblong modifica- 
tion of P. Menardii, d’Orb. The superior surface is subconical, the 
inferior strongly convex. There seems to be no satisfactory descrip- 
tion or figure of this variety, tliough the dead shells are common, 
and of large size, in many deep-sea dredgings. 
Pidvinulina favus, nov., is a somewhat remarkable species. "When 
fully grown, the test is lenticular, and nearly symmetrically bi- 
convex, and the surface, except around the aperture, which is oblique, 
and peripheral, is covered with a raised reticulate ornamentation. 
The spiral structure is entirely concealed by the exogenous honey- 
comb-like shelly deposit. Young specimens are relatively much 
thicker than adults, and have the margin blunt or rounded. 
Comparing the Rhizopod fauna characterized by the species above 
enumerated with what we know of the accumulations at present 
going on at the sea-bottom in various parts of the globe, it is not 
difficult to indicate recent deposits at depths of 1400 fathoins and 
upwards in either the Atlantic or the Pacific having the same 
general characters in their organic constituents. There is, however, 
one species, Pulvinulina favus, which serves to limit the area of com- 
parison. A cursory examination of the rough notes upon about a 
hundred and fifty soundings from the “ Challenger ” and “ Porcu- 
pine ” expeditions has only furnished six localities at which this 
form occurs, and these are all of them between Stations 271 and 302 
of the “ Challenger” series, that is, from just on the Equator in the 
middle of the Pacific, on a course direct south and then east, to a 
point off the South American coast, lat. 42° 43' S., long. 82° 11' W., 
the depths varying from 1375 faths. to 2435 faths. Upon closer 
