﻿JSenrij B. Brady — Notes on Cretaceous Foraminifera. 535 



Quinqiieloculina 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, pi. 26, fig. o), though in some- 

 what clumsy fashion, under the name above employed. 



Lagena marginata. — Two or three pretty distinct forms are in- 

 cluded under this specific name. The varieties of L. marginata 

 have not as yet been sufSciently worked out. 



Glohigerina 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,' pi. 12, fig. 11) under the name Glohigerina 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. Eeserving 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, pouch-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 thick, 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, though the dead shells are common, 

 and of large size, in many deep-sea dredgings. 



Pulvinidina 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 Ehizopod 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 fathoms 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 



