STUDIES IN FORAMINIFERA 



209 



inflated and fewer chambers to each whorl. It occurs in 

 the Grandstand and Topagorulc formations. 



This species is named in honor of T. G. Payne, geol- 

 ogist formerly with the U. S. Geological Sm-vey, in 

 recognition of his work on the stratigraphy of the 

 Cretaceous strata of Alaska. 



Types and occurrence: Holotype (USNM P 4375 

 from well cuttings at 4,140-4,150 feet, imfigured para- 

 type (USNM P4376) from well cuttmgs at 4,150-4,160 

 feet, unfigured paratypes (USNM P4377) from well 

 cuttings at 3,160-3,170 feet, unfigm-ed paratypes 

 (USNM P4378) from well cuttings at 4,460-4,470 feet, 

 all in the Topagoruk formation, in Umiat test well 1, 

 west of Umiat, at lat. 69°23'52" N., long. 152°19'45" 

 W., in the northern foothills of the Brooks Range, 

 northern Alaska. 



Figured paratype (USNM P4379) and unfigm-ed 

 paratypes (USNM P4380) from a core at 602-609 feet 

 in the Grandstand formation; unfigured paratjrpes 

 (USNM P4381) from well cuttings at 1,560-1,570 feet, 

 unfigured paratype (USNM P43S2) from well cuttings 

 at 2,850-2,860 feet, unfigured paratype (USNM P4383) 

 from well cuttings at 2,900-2,910 feet, figured paratypes 

 (USNM P4384a,b) from well cuttings at 2,980-2,990 

 feet, and imfigured paratj^e (USNM P4385) from well 

 cuttings at 4,580-4,590 feet, all in the Topagoruk for- 

 mation; all in Umiat test well 2, at lat. 69°23'04" N., 

 long. 152°05'01" W., north of Umiat, in the northern 

 foothills of the Brooks Range, northern Alaska. 



Arenobulimina torula Tappan, new species 

 Plate 67, Figures 5-7 



Test free, elongate, flaring from the pointed base, 

 rounded in section; chambers numerous, low and 

 triserial in the early portion, later becoming higher and 

 narrower with foiu- chambers to a whorl, the chambers 

 lying somewhat obliquely; sutures distinct, flush, 

 oblique, somewhat darker in color than the remainder 

 of the test; wall finely arenaceous, surface smoothly 

 finished, specimens commonly crushed in various ways 

 in preservation; aperture an arch at the base of the 

 inner face of the final chamber. 



Length of holotype 0.62 mm., breadth 0.36 mm. 

 Paratypes range from 0.16 to 0.68 mm. in length. 



Remarks: Arenobulimina torula, new species, differs 

 from A. chapmani Cushman in being slightly larger, and 

 in having broader, lower, and more inflated chambers, 

 and in being more finely arenaceous with a more smooth- 

 ly finished surface. 



This species occurs in the Ayiyak member of the 

 Seabee formation and in the Ignek formation. 



Types and occurrence: Holotype (USNM P4393) 

 from the Ignek formation, on the Shaviovik anticline, 

 seismograph party 144, line 4-53, shot hole 6, at 50-100 

 feet, at lat. 69°34'24" N., long. 147°33'35" W., at the 

 eastern end of the northern foothiUs of the Brooks 

 Range, northern Alaska. 



Unfigm-ed paratype (USNM P4394) from a depth of 

 50-100 feet and unfigured paratypes (USNM P4395) 



from a depth of 100-150 feet, all in the Ignek formation, 

 seismograph party 144, line 8-53, shot hole 4, along the 

 Shaviovik anticlme, at lat. 69°34'26" N., long. 147°43' 

 03" W., at the eastern end of the northern foothills 

 of the Brooks Range, northern Alaska. 



Figm-ed paratypes (USNM P4396a,b) and unfigured 

 paratypes (USNM P4397) from the Ignek formation 

 (field sample 46A L 66), at the base of the section ex- 

 posed at the confluence of the Ivishak and Sagavanirk- 

 tok Rivers, at approximately lat. 69°30' N., long. 

 148°30' W., in northern Alaska. Collected by E. H. 

 Lathram, 1946. 



Unfigured paratypes (USNM P4398) from the 

 Ayiyak member of the Seabee formation (field sample 

 47A Wb 35), on the Nanushuk River, at lat. 68°45' N., 

 long. 150°43' W., in the northern foothills of the Brooks 

 Range, northern Alaska. Collected by E. J. Webber, 

 1947. 



Unfigured paratypes (USNM P4399) from the Ayiyak 

 member of the Seabee formation, in Umiat seismograph 

 shot pomt 13, at a depth of 25 feet, at lat. 69°24'29.4" 

 N., long. 152°05'19.8" W., near Umiat, in the northern 

 foothills of the Brooks Range, northern Alaska. 



Unfigured paratypes (USNM P4400) from the Seabee 

 formation, at 561-571 feet, in Umiat test well 11, lat. 

 69°24'29" N., long. 152°05'58" W., north of Umiat, 

 northern Alaska. 



Genus Dorothia Plummet, 1931 

 Dorothia chandlerensis Tappan, new species 

 Plate 66, Figures 29, 30 



Test free, narrow, elongate, sides nearly parallel; 

 early chambers in a whorl at the base forming a some- 

 what inflated knob, followed by seven or eight pairs 

 of biseriaUy arranged, somewhat compressed chambers 

 all of nearly equal size, relatively low and broad ; sutures 

 obscure in the early portion, distinct and depressed in 

 the biserial portion; wall finely arenaceous, roughly 

 finished; apertiu-e a low arch at the base of the final 

 chamber. 



Length of holotype 0.62 mm., breadth 0.18 mm. 

 Paratypes range from 0.39 to 0.99 mm. in length. 



Remarks: Dorothia chandlerensis, new species, differs 

 from D.filijormis (Berthelin) in the more bvdbous early 

 portion, the broader parallel-sided biserial portion, and 

 more roughly finished wall. 



It occurs in the Torok and Oumalik formations. 



Types and occurrence: Holotype (USNM P4401) 

 and unfigured paratypes (USNM P4402) from field 

 sample 48A Dt 120, in the Torok formation, 4300 feet 

 below the top of the section exposed in Tuktu Bluff, 

 and unfigured paratypes (USNM P4403) from field 

 sample 48A Dt 121, taken 80 feet lower, in the Tuktu 

 Bluff on the Chandler River, at lat. 68°41' N., long. 

 152°15' W., in the southern foothills section of the 

 Brooks Range, northern Alaska. Collected bj"- R. L. 

 Detterman, 1948. 



Figured parat3T)e (USNM P4404) from well cuttings 

 at 5,150-5,160 feet in the Oumalik formation, in 



