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UNITED STATES NATIONAL MUSEUM BULLETIN 215 



found; its true stratigraphic age is inferred from the 

 occurrence of other specimens ia core samples. 



This species is found in the Grandstand and Topa- 

 goruk formations; its appearance ia older rocks is 

 probably due to contamination of the well cuttings. 



It is named for P. F. Moran, administrative assistant, 

 U. S. Geological Survey. 



Types and occurrbncb: Holotype (USNM P4638) 

 from well cuttings at 5,670-5,680 feet, probably from 

 the Topagoruk formation, found as contamination in 

 the underlying Jurassic rocks ; figm-ed paratypes (USNM 

 P4639a-c) and unfigured paratype (USNM P4640) 

 from a core at 2,235-2,245 feet, unfigured paratype 

 (USNM P4641) from a core at 2,275-2,285 feet, all 

 from the Topagoruk formation; unfigured paratype 

 (USNM P4644) from well cuttings at 3,760-3,770 feet, 

 unfigm-ed paratype (USNM P4642) from weU cuttings 

 at 4,180-4,190 feet, and figured paratype (USNM 

 P4643) from weU cuttings at 5,190-5,200 feet, aU of 

 Topagoruk age but found as contamination in older 

 beds; aU from Simpson test weU 1, at lat. 70°57'05" N., 

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

 Alaska. 



Figured paratype (USNM P4645) and unfigured 

 paratjrpe (USNM P4646) from the upper part of the 

 Torok formation (Topagoruk formation equivalent) 

 (field sample 47A "Wli 543), and figured paratjrpe 

 (USNM P4647) and unfigured paratype (USNM P4648) 

 from the upper part of the Torok formation (Topagoruk 

 formation equivalent) (field sample 47 A Wh 541), all 

 on the north flank of the Awuna anticline, along 

 Birthday Creek, which flows south into the Awuna 

 Kiver, at lat. 69°11'30" N., long. 156°41' W., m the 

 northern foothills of the Brooks Kange, north-central 

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



Unfigured paratypes (USNM P4659) from a core at 

 2,789-2,797 feet in the Grandstand formation, in 

 Oumalik test well 1, at lat. 69°50'18" N., long. 

 155°59'24" W., approximately 125 miles airline south 

 of Point Barrow, northern Alaska. 



Genus Globorotalites Brotzen, 1942 



Globorotalites alaskensis Tappan, new species 



Plate 69, Figures 11-13 



Test free, trochoid, dorsally flat to slightly convex, 

 ventrally strongly convex and centrally umbilicate, 

 periphery subacute ; chambers increasing rapidly in size 

 and becoming more oblique dorsaUy, extending back 

 along the periphery, the six to eight chambers of the 

 final whorl may be slightly less elevated than the pe- 

 ripheral keel, presenting an almost collapsed appearance ; 

 sutm-es distinct, dorsaUy oblique, those of final whorl 

 somewhat thickened and elevated dorsally, radial and 

 flush or slightly depressed ventrally; wall calcareous, 

 finely perforate, surface smooth; aperture interiomarg- 

 inal, ventral, a low slit extending from the umbUicus 

 almost to the periphery. 



Greatest diameter of holotype 0.31 mm., thickness 



0.13 mm. Paratypes range from 0.16 to 0.36 mm. in 

 diameter. 



Remarks: Globorotalites alaskensis, new species, 

 differs from 6. midtisepta (Brotzen) in being one-third 

 as large, in being less elevated ventrally, in having 

 fewer chambers per whorl, and in the chambers being 

 broader and the sutures less oblique. 



It occurs in the Grandstand and Topagoruk forma- 

 tions. 



Types and occurrence: Holotype (USNM P4649) 

 and unfigured paratypes (USNM P4650) from a core 

 at 680-690 feet in the Grandstand formation; imfigured 

 paratypes (USNM P4651) from a core at 1,429-1,439 

 feet and figured paratjrpe (USNM P4652) from well 

 cuttings at 1,770-1,780 feet in the Topagoruk forma- 

 tion; all m Umiat test weU 2, at lat. 69°23'04" N., long. 

 152°05'01" W., north of Umiat, m the northern foot- 

 hills of the Brooks Range, northern Alaska. 



Figmed paratype (USNM P4653) and unfigured 

 paratype (USNM P4654) from a core at 206-211 feet, 

 unfigured paratype (USNM P4655) from a core at 

 211-221 feet, and unfigured paratype (USNM P4656) 

 from a core at 555-565 feet, all in the Grandstand 

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

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

 Alaska. 



Unfigured paratypes (USNM P4657) from well cut- 

 tings at 190-200 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. 



Unfigm-ed paratypes (USNM P4658) from a core at 

 874-885 feet in the Grandstand formation, in Simpson 

 core test 25, at lat. 70°55'56" N., long. 154°43'52" W., 

 near Cape Simpson, northern Alaska. 



Family ChUostomeUidae Brady, 1881 

 Genus Pallaimorphina Tappan, new genus 



Type species: Pallaimorphina ruckerae Tappan, 

 new species. (Derivation: pallai, Gr., plural of palla, 

 f., ball -|- morphe, Gr., form or shape -|- ina, dimin- 

 utive suffix; gender feminine.) 



Test free, small, subglobular, trochoid, with broadly 

 rounded periphery; chambers increasing rapidly but 

 evenly in size as added, early chambers subglobular, 

 later tending to become crescentic in dorsal view, four 

 to five in the final whorl; sutures oblique dorsally, 

 radial ventrally; wall calcareous, finely perforate, 

 granular in structure, surface smooth; aperture a low 

 sutxu-al slit, extending from the umbilical region about 

 half the distance to the periphery, bordered above by 

 a narrow lip. 



Remarks: Pallaimorphina, new genus, is closest in 

 character to Quadrimorphina Finlay and may have 

 given rise to that genus. It differs in the gradual 

 chamber enlargement, and does not have the extremely 

 high final chamber characteristic of the genera Allo- 

 morphina and Quadrimorphina. The apertural flap of 

 Pallaimorphina is also primitive, being extremely 



