NO. 4 CUSHMAN AND MCCULLOCH: SOME VIRGULININAE 225 



and less well developed than is usual. The specimens included from Aus- 

 tralia may not belong here but have many similar characters. 



Stations: 76, 244, 295, 461, 466, 501, 616. 



Distribution. — Off Guadalupe Island in 12 fms. ; in the Gulf of 

 California, Mexico, in 5 to 10 fms.; at Tagus Cove, Albemarle Island, 

 in 80 fms. ; off Charles Island in 23 fms. ; off La Libertad, Ecuador, in 4 

 fms. ; and off the east coast of Australia at low tide. 



Genus BIFARINA Parker and Jones, 1872 



Bifarina hancocki Cushman and McCulloch, new species 

 Plate 28, Figs. 13-19 



Test in the early stages compressed, biserial, in the adult uniserial and 

 broadly elliptical in end view, periphery broadly rounded ; chambers dis- 

 tinct, slightly inflated in the early stages, in the adult uniserial portion 

 strongly inflated ; sutures distinct, m the early biserial portion strongly 

 limbate and raised, in the earliest portion strongly oblique, less so as 

 growth progresses, in the adult uniserial portion, depressed ; wall distinct- 

 ly perforate, in the early portion and in some specimens somewhat spinose 

 throughout; aperture in the adult terminal, elliptical, with a distinct lip. 

 Length 0.50-0.65 mm.; breadth 0.15-0.20 mm.; thickness 0.10-0.15 mm. 



Holotype (AHF no. 48) from Station 503. 



This species differs from B. zanzibarensis Cushman in the strongly 

 raised and limbate sutures, more slender test, and spinose surface. 



There is considerable variation as shown in our figures. The surface is 

 finely to coarsely spinose or in some specimens nearly smooth in the last- 

 formed chambers. In the large series, however, these variations seem to 

 merge and the whole represent a single species. 



Stations: 61, 256, 321, 331, 503, 514, 540, 543, 558, 583. 



Type locality. — La Libertad, Ecuador, in 19 fms. 



Distribution. — In shallow waters of the Gulf of California in 17 to 

 38 fms.; off Costa Rica in 9 fms.; off Panama in 15 fms.; off Colombia 

 and Ecuador in 10 to 19 fms. 



Bifarina pacifica Cushman and McCulloch, new species 

 Plate 28, Fig. 20 

 Test elongate, compressed throughout, slender, early portion biserial, 

 tapering, adult with the sides nearly parallel, uniserial, periphery 

 rounded, lobulate; chambers distinct, slightly inflated, in the adult uni- 

 serial portion much wider than high ; sutures distinct, somewhat limbate, 



