rOKAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 245 



several times the length of the coiled portion, inner margin slightly 

 keeled, peripheral margin bluntly rounded; sutures with a raised 

 portion along the central portion of the peripheral half of the test, 

 surface otherwise smooth and unornamcnted ; aperture radiate. 



Length up to 5 mm. 



Distribution. — Type specimen (U.S.N.M. No. 9134) from Albatross 

 station D5381, in 88 fathoms (161 meters), Raygay Gulf, Luzon. 

 The species is fairly common in the area. Beside the type station it 

 oecm'red at various stations: China Sea, off southern Luzon; east 

 coast of Mindoro; off western Bohol; Sogod Bay, southern Leyte; 

 off northwestern Panay; off Marinduque Island; Jolo Sea; north of 

 Taua Tawi; and vSibuko Bay, Borneo. At some of the stations 

 specimens were abundant. 



The stations range in depth from 88 to 554 fathoms (161 to 1,012 

 meters), the average being 236 fathoms (432 meters). The average 

 bottom temperature is 51.9° F. (11.0° C). 



This is a species rather striking in its crozier form and peculiar but 

 distinctive ornamentation. 



Cristellaria cassinoides — Material examined. 



CRISTELLARIA TUMIDO-COSTATA Cushman. 



Plate 49, figs, 4a,b. 

 Cristellaria tumido-costata Cushman, Proc. U. S. Nat. Mus., vol. 51, 1917, p. 660. 



Descrijjtion. — Test very broadly biconvex, close-coiled; chambers 

 comparatively few in the whorl; sutures marked by a series of very 

 strong raised ribs uniting at the umbilicus ; remaining surface between 

 the sutures marked by a series of short, well-rounded, parallel costae, 

 running obliquely to the axis of growth; peripheral portion of the test 

 also marked b}^ a series of costae parallel to the periphery, or nearly 

 so; apertural face flattened or concave with a broad rim about the 

 margin; aperture radiate at the peripheral angle of the chamber. 



