Plate 11 



Figures 1-3. Sigmoilina schlumbergeri A Silvestri. Figs 1, 2, X 80. Fig. 3, 

 X 90. 1. From off S. W. Ireland, 620-695 fathoms. Fig. 2, 

 same. 1,000 fathoms. 3. From Albatross Station 2377, Gulf 

 of Mexico. 



4. Sigmoilina asperula (Karrer). a, side view; b, apertural view. 



5. Sigmoilina sigmoidea (H. B. Brady). X 90. After Heron- Alien 



and Earland. a, b, opposite sides; c, apertural view. 



6. Sigm.oilina sigmoidea (H. B. Brady). X 60. Albatross D 2\\7 . 



a, side view; b, apertural view. 



7. Ariiculina sagra d'Orbigny. X 60. Tortugas. 



S-10. Ariiculina lineata H. B. Brady. X 40. After H. B. Brady. 

 112 



