Plate 38 



Figs. 1. Sigmomorphina sawanensis (Cushman and Ozawa). X 45. Upper 

 Pliocene, Natsukawa, Province of Echigo, Japan, a, side view; 

 b, basal view. 



2. Sigmomorphina vaughani Cushman and Ozawa. X 35. Eocene, 



Cooper marl, Cooper River, S. C. a, b, side views; c, basal view. 



3. Sigmomorphina williamsoni (Terquem). X 45. Recent, coast of 



Belgium, a, side view; b, basal view. 



4. Sigmomorphina williamsoni (Terquem). X 65. Recent, coast of 



Belgium, a, b, side views; c, basal view. 

 5-7. Sigmomorphina concava (Williamson). X 80. 5, Recent, coast of 

 Belgium. 6, Recent, off island of Delos, Mediterranean, 10 

 fathoms. 7, Pliocene, Monte Mario, near Rome, Italy, a, side 

 view^ b, basal view. 

 8. Sigm,omorphina aliceae Cushman and Ozawa. X 35. Albatross 

 D4805, coast of Japan, o, side view; b, basal view. 



183 



