NO. 1 CUSHMAN, MCCULLOCH : ARENACEOUS FORAMINIFERA 99 



toward the apertural end; sutures only slightly depressed; wall rather 

 coarsely arenaceous for the size of the test; aperture terminal, rounded. 



Length up to 0.30 mm; diameter 0.08-0.10 mm. 



Holotype (AHF no. 16) from locality 236. 



This species differs from G. flintii Cushman in its very small size, 

 more slender test and fusiform shape. It is a fairly common species as 

 the list of localities shows and at some stations seems to be abundant. 

 It may easily be overlooked on account of its small size. It occurs at 

 the following stations: C-9, 558, 416, 76, 216, 64, 2057, 2004, 2007, 

 500, 263, 292, 255, 2028, 271, 238, 235, 236, 258, 2067. 



Distribution. — ^Type locality is near Magdalena Bay, Mexico, in 19 

 fms. From Arvila, California, in 7 fms. to La Plata, Ecuador, in 10 fms. 



Genus GRIBROGOfiSELLA Cushman, 1935 

 Gribrogoesella pacifica Cushman and McCulloch, new species 



Plate 10, Figs. 10-12 



Test elongate, subcylindrical, increasing in size slowly, often slightly 

 reduced in diameter immediately after the triserial stage, uniserial stage 

 making up much the greater part of the test, often distinctly curved; 

 chambers fairly distinct, especially in the later portion, 2 or 3 times as 

 broad as high, slightly overlapping, increasing in size only very gradu- 

 ally as added ; sutures mostly indistinct except in the later portion where 

 they are slightly depressed ; wall rather coarsely arenaceous but smoothly 

 finished; aperture in the adult becoming multiple, in some specimens 

 with as many as 6 or 8 rounded openings in the terminal face of the 

 last-formed chamber. 



Length up to 4.00 mm or more; diameter up to 1.00 mm. 



Holotype (AHF no. 17) from locality 2070. 



This species differs from C. robusta (H. B. Brady) in the much 

 smaller proportion of the triserial stage, more coarsely arenaceous test, 

 larger pores in the cribrate aperture, and the curved test in the larger 

 forms. 



The early stages have but a single aperture but the larger curved 

 forms have several and a very long uniserial stage. This is the first 

 record of this genus in the Pacific. It occurs at the following stations: 

 474, 475, 488, 2070, 487. 



Distribution. — Type locality is ofiF Guadalupe Island, in 250 fms. 

 In the Galapagos Islands; stations show a range from off Tower at 

 120 fms., off Hood, 160-170, and off Chatham, a depth range of 

 400 fms. 



