8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



EXPLANATION OF PLATES 



Plate i 



Figs, i, 2. Unuila arctica Cushman, 11. sp. X 60. Fig. i, holotype. a, dorsal 

 view ; b, ventral view ; c, peripheral view. Fig. 2, paratype. a, dorsal 

 view ; b, ventral view. 



Sa-c. Quinqnelociilina arctica Cushman, n. sp. X 50- Holotype. a, b, 

 opposite sides; c, apertural view. 



4. Qidnqucloculina fusca H. B. Brady var. grocnlandica Cushman, n. var. 

 X60. 



5-7. Gordiospira arctica Cushman. n. sp. X 80. Fig. 5. holotype. Figs. 

 6, 7. young stages. 



8a, b. Elphidium frigidum Cushman, n. sp. X 35- a, side view; b, periph- 

 eral view. 



90, b. Elphidium bartletti Cushman, n. sp. X 35- a, side view; b, periph- 

 eral view. 



loa, b. Elphidium groenlandicuin Cushman, n. sp. X 35- «, side view; 

 b, peripheral view. 



Pl.\te 2 



Figs, i, 2. Spirillina arctica Cushman, n. sp. X 100. Fig. i, holotype. Fig. 2, 

 paratype. a, a, b, b, opposite sides; c, c, peripheral views. 



3-6. Discorbis bartletti Cushman, n. sp. X 35- Fig. 3, holotype. a, dorsal 

 view ; b, ventral view ; c, peripheral view. Fig. 4, young four- 

 chambered megalospheric form. Fig. 5. later stage. Fig. 6, adult. 

 Figs. 4-6, dorsal views. 



ya-c. Cassidulina norcrossi Cushman, n. sp. X 60. Holotype. a. b, op- 

 posite sides; c, peripheral view. 



