212 



UNITED STATES NATIONAL MUSEUM BULLETIN 215 



Length of holotype 0.83 mm., breadth 0.57 mm., 

 thickness 0.05 mm. Paratypes range from 0.29 to 0.91 

 mm. in length. 



Remarks: Psamminopelta bowsheri, new species, 

 differs from Massilina texasensis Cushman in the nar- 

 rower chambers, planispiral coUing, relatively broader 

 test, and the agglutinated waU, which is insoluble in 

 acid. 



The species occurs in the Grandstand, TopagoruJi, 

 Tuktu, and upper part of the Torok formations and in 

 marine zones of the equivalent Chandler formation. 

 It is named in honor of A. L. Bowsher, geologist, 

 U. S. Geological Survey. 



Types and occurrence: Holotype (USNM P4424) 

 from a core at 256-264 feet in the Grandstand forma- 

 tion, in Skull Cliff core test 1, at lat. 70°55' N., long. 

 157°38' W., between Point Barrow and Point Franklin, 

 northern Alaska. 



Unfigured paratypes (USNM P4425) from a core at 

 438-443 feet, in the Grandstand formation, figured 

 paratype (USNM P4426) from a core at 1,020-1,030 

 feet and unfigured paratypes (USNM P4427) from a 

 core at 1,247-1,267 feet in the Topagoruk formation, 

 all in Simpson test well 1, at lat. 70°57'05" N., long. 

 155°21'45" W., west of Cape Simpson, northern Alaska. 



Unfigured paratype (USNM P4428) from well cut- 

 tings at 470-480 feet in the Grandstand formation, in 

 Simpson core test 10, at lat. 70°57'34" N., long. 

 155°17'27" W., near Cape Simpson, northern Alaska. 



Unfigured paratypes (USNM P4468) from a core at 

 1,424-1,434 feet, figured paratype (USNM P4429) from 

 a core at 1,615-1,620 feet, and figured paratypes 

 (USNM P4430a-d) and unfigured paratypes (USNM 

 P4431) from a core at 1,810-1,816 feet, all from the 

 Grandstand formation; and unfigured paratypes 

 (USNM P4432) from well cuttings at 3,970-3,980 feet 

 and unfigured paratype (USNM P4433) from well 

 cuttings at 4,790-4,800 feet in the Topagoruk forma- 

 tion; all in Umiat test well 1, at lat. 69°23'52" N., 

 long. 152°19'45" W., west of Umiat, in the northern 

 foothills of the Brooks Range, northern Alaska. 



Figured paratype (USNM P4434) from residual soil 

 of the Grandstand form.ation (field sample 47A Wh 

 688), at lat. 69°02'48" N., long. 155°59'30" W.; un- 

 figm-ed paratypes (USNM P4435) from residual soil of 

 marine zone in the Chandler formation (field sample 

 47A Wh 648), at lat. 69°06'12" N., long. 155°57' W.; 

 figured paratype (USNM P4436) and unfigm-ed para- 

 type (USNM P4437) from field sample 47A Wh 654, a 

 residual soil sample of marine tongues taken 610-650 

 feet above the base of the Chandler formation, at lat. 

 69°06'48" N., long. 155°58' W.; and unfigured para- 

 type (USNM P4438) from residual soU of marine zone 

 in the Chandler formation (field sample 47 A Wh 671), 

 at lat. 69°07'18" N., long. 155°58'18" W.; all from 

 the south flank of the Awuna anticline, in the northern 

 foothills of the Brooks Range, northern Alaska. Col- 

 lected by C. L. Whittington, 1947. 



Unfigured paratypes (USNM P4439) from marine 

 zone in the Chandler formation (field sample 48A Dt 



249), from the Chandler River area, at lat. 68°55' N., 

 long. 151°50' W., in the northern foothills of the Brooks 

 Range, northern Alaska. Collected by R. L. Detter- 

 man, 1948. 



Figured paratype (USNM P4462) and unfigured 

 paratypes (USNM P4463) from field sample 47A Tr 

 253, in the Kukpowruk formation, on the north flank of 

 the Awuna anticline, at lat. 69°09'30" N., long. 

 155°59' W., in the northern foothills of the Brooks 

 Range, northern Alaska. Collected by M. L. Troyer, 

 1947. 



Unfigured paratypes (USNM P4464) from field 

 sample 47A Wh 594, residual soil sample of the 

 Grandstand formation, on the south flank of the 

 Kigalik anticline, lat. 69°17'48" N., long. 155°51' W., 

 in the northern foothills of the Brooks Range, northern 

 Alaska. Collected by C. L. Whittington, 1947. 



Unfigured paratype (USNM P4465), from seismo- 

 graph party 47, line 14 A^8, shot hole 45, at 110-120 

 feet, in the Grandstand formation, at lat. 71°16'20" 

 N., long. 156°45'07" W., in the Arctic Coastal Plain 

 of northern Alaska. 



Unfigured paratype (USNM P4466) from the Grand- 

 stand formation (field sample 47 A Dt 227) from 4% 

 miles airline upstream from the mouth of Fossil Creek, 

 tributary to the ColviUe River, at approximately lat. 

 69°19'20" N., long. 152°28' W., in the northern 

 foothills of the Brooks Range, northern Alaska. Col- 

 lected by R. L. Detterman, 1947. 



Unfigured paratype (USNM P4467) from 81 feet 

 below the top of the Tuktu formation (field sample 

 47A Z 604) and unfigured paratypes (USNM P4445) 

 from 70 feet above the base of the Tuktu formation 

 (field sample 47A Z 608), on the north limb of the 

 Kurupa anticline, in a section from lat. 68°55' N., 

 long. 155°05' W., to lat. 69°N., long. 155° W., along the 

 Kurupa River, in the northern foothflls of the Brooks 

 Range, northern Alaska. Collected by J. H. Zumberge, 

 1947. 



Figured paratype (USNM P4443) and unfigured 

 paratypes (USNM P4444) from field sample 47A Wh 

 199, in the upper part of the Torok formation, equiva- 

 lent to the Topagoruk formation of the subsurface, 

 75-100 feet above the base of the section exposed on 

 Quartzite Creek, Awuna River region, at lat. 69°13' 

 N., long. 157°02'18" W., in the northern foothills of 

 the Brooks Range, northern Alaska. Collected by 

 C. L. Whittington, 1947. 



Unfigured paratypes (USNM P4447) from field 

 sample 47A Ba 50, in a marine zone, in an unnamed, 

 dominantly nonmarine upper unit of the Nanushuk 

 group of the western area and equivalent to the Corwin 

 formation of the Cape Lisburne Peninsula, 1,400 feet 

 below the top of a 3,700-foot section of intermittent 

 exposures along the north bank of the Utukok River, 

 at approximately lat. 69°07'30" N., long. 160°54' W., 

 about 70 miles east of Cape Beaufort, in the northern 

 foothills of the Brooks Range, northern Alaska. 

 CoUected by W. L. Barksdale, 1947. 



