Plate 13 



Figure 1. Triloculina trigonula (hamavck). X 50. From Lo7-d Batidon, log. 42, 

 off S. W. Ireland, o, b, opposite sides; c, apertural view. 



2. Triloculina trigonula (Lamarck). After Williamson, a, b, opposite 



sides; c, apertural view. 



3. Triloculina tricarinata d'Orhigny. X 40. Tortugas. a-c, side views. 



4. Triloculina oblongad' Ovbigny. X 60. Tortugas. a, fo, opposite sides; 



c, apertural view.' 



5. Triloculina oblonga d'Orbigny. After Williamson, a, b, opposite 



sides. 



6. Triloculina circularis Bornemann. X 40. Tortugas. a, b, opposite 



sides; c, apertural view. 



7. Triloculina circularis Bornemann. X 40. Dogs Bay, Ireland, a, b, 



opposite sides; c, apertural view. 

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