204 



UNITED STATES NATIONAL MUSEUM BULLETIN 215 



less distorted, it is possible to determine the true 

 characters. It is found in the Grandstand and Topa- 

 goruk formations, the upper part of the Torok of the 

 surface sections, and in marine zones within the 

 Chandler formation. 



The species differs from Haplophragmoides collyra 

 Nauss in having more numerous chambers in the final 

 whorl and a less lobulate periphery. It is distinguished 

 from H. eggeri Cushman in being about twice as large 

 and in having about double the number of chambers in 

 the final whorl. 



It occurs at approximately the same stratigraphic 

 position as does Haplophragmoides gigas Cushman in 

 Canada, in beds of middle and upper Albian age. 

 Although similar to H. gigas in size, and possibly 

 related to it, the present species lacks the distinctly 

 sinuate sutures and the raised umbilical margins which 

 are characteristic of the Canadian form. 



Types and occureence: Holotype (USNM P4242) 

 and unfigured paratypes (USNM P4243) from a core 

 at 1,322-1,330 feet in the Topagoruk formation; un- 

 figured paratypes (USNM P4244) from a core at 303- 

 308 feet, unfigured paratypes (USNM P4245) from 

 a core at 443—444 feet, figiu-ed paratypes (USNM 

 P4246a,b) and unfigured paratypes (USNM P4247) 

 from a core at 533-543 feet, unfigiu-ed paratypes 

 (USNM P4248) from a core at 565-578 feet, unfigured 

 paratypes (USNM P4249) from a core at 578-588 feet, 

 and unfigured paratypes (USNM P4250) from a core 

 at 713-723 feet, aU in the Grandstand formation; un- 

 figured paratypes (USNM P4251) from a core at 1,227- 

 1,237 feet, figured paratype (USNM P4252) and un- 

 figured paratypes (USNM P4253) from a core at 1,247- 

 1,267 feet, figured paratype (USNM P4254) and un- 

 figm-ed paratypes (USNM P4255) from well cuttings 

 at 1,730-1,740 feet, unfigured paratypes (USNM P4256) 

 from well cuttings at 1,830-1,840 feet, figured paratype 

 (USNM P4257) and unfigured paratypes (USNM 

 P4258) from a core at 2,235-2,245 feet, unfigured 

 paratypes (USNM P4259) from a core at 2,739-2,749 

 feet, unfigured paratypes (USNM P4260) from well 

 cuttings at 2,760-2,770 feet, and unfigured paratypes 

 USNM P4261) from well cuttings at 2,880-2,890 feet, 

 all in the Topagoruk formation; aU from Simpson test 

 weU 1, at lat. 70°57'05" N., long. 155°21'45" W., west 

 of Cape Simpson, northern Alaska. 



Unfigured paratypes (USNM P4262) from well cut- 

 tings at 1,180-1,190 feet and (USNM P4263) at 1,370- 

 1,380 feet in the Topagoruk formation, from South 

 Barrow test well 1, lat. 71°19'12" N., long. 156°42'15" 

 W., southwest of Point Barrow, northern Alaska. 



Unfigured paratypes (USNM P4269) from a core at 

 264 feet in the Grandstand formation, in SkuU ClifP 

 core test 1, at lat. 70°55' N., long. 157°38' W., south- 

 west of Point Barrow;, and approximately midway 

 between Point Barrow and Point Franklin, northern 

 Alaska. 



Figin-ed paratype (USNM P4270) from a core at 

 3,776-3,786 feet in the Topagoruk formation, in Fish 

 Creek test well 1, at lat. 70°18'36" N., long. 151°52'40" 



W., about 15 miles west of the mouth of the ColviUe 

 River, northern Alaska. 



Unfigured paratypes (USNM P4271) from a core at 

 1,615-1,625 feet and unfigured paratypes (USNM 

 P4272) from a core at 1,625-1,635 feet, unfigured para- 

 types (USNM P4273) from a core at 2,347-2,357 feet, 

 and unfigured paratypes (USNM P4274) from a core 

 at 2,365-2,370 feet, all in the Grandstand formation; 

 and figured paratype (USNM P4275) from well cuttings 

 at 3,660-3,670 feet and unfigured paratypes (USNM 

 P4276) from well cuttings at 4,110-4,120 feet, all m the 

 Topagoruk formation; all 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 P4277) and unfigured 

 paratypes (USNM P4278) from cuttings at 2,400-2,410 

 feet and figured paratype (USNM P4279) from cuttings 

 at 2,950-2,960 feet, aU in the Topagoruk formation, 

 in Umiat test well 2, north of Umiat, at lat. 69°23'04" 

 N., long. 152°05'01" W., in the northern foothills of 

 the Brooks Range, northern Alaska. 



Unfigured paratypes (USNM P4280) from the upper 

 part of the Torok formation, equivalent of the upper 

 part of the Topagoruk formation in the subsvirface, 

 about 2,960 feet below the top of the Grandstand 

 formation (field sample 47A Dt 223), 5 miles airline 

 upstream from the mouth of Fossil Creek, a smaU north- 

 flowing tributary to the Colville River. Unfigured 

 paratjrpes (USNM P4281) from the Grandstand forma- 

 tion, 2,390 feet below the top (field sample 47A Dt 227), 

 about % mUe farther upstream; unfigured paratypes 

 (USNM P4282) from the Grandstand formation, 2,000 

 feet below the top (field sample 47A Dt 236), about K 

 mile farther upstream; and unfigured paratypes (USNM 

 P4283) from the Grandstand formation, 1,450 feet below 

 the top (field sample 47A Dt 244), about 1% miles 

 farther upstream, from approximately lat. 69°19'30" 

 N., to 69°18'40" N., long. 152°28' W., in the northern 

 foothUls of the Brooks Range, northern Alaska. Col- 

 lected by R. L. Detterman, 1947. 



Unfigured paratypes (USNM P4284) from the Grand- 

 stand formation (field sample 48A Dt 336) on Trouble 

 Creek, Big Bend anticline, at lat. 69°06'30" N., long. 

 151''38' W., in the area of the Chandler River, northern 

 foothills of the Brooks Range, northern Alaska. Col- 

 lected by R. L. Detterman, 1948. 



Unfigured paratypes (USNM P4285) from the 

 Grandstand formation, 140 feet below the base of the 

 Ninuluk formation (field sample 48A Dt 268), Chandler 

 River, Niakogon syncline to Big Bend anticline, lat. 

 69°04' N., long. 151°52' W., northern Alaska. Collected 

 by R. L. Detterman, 1947. 



Unfigured paratypes (USNM P4286) from a marine 

 zone in the Chandler formation (field sample 47A Tr 

 241), north flank of Awuna anticline, lat. 69°12'18" N., 

 long. 155°47' W., northern Alaska. Collected by M. 

 L. Troyer, 1947. 



Unfigured paratype (USNM P4287) from well cut- 

 tings at 250-260 feet in the Grandstand formation, in 



