[Page 27], for epiphippium read ephippium.

[Page 35], line 12, delete not.

[Page 36], line 14, read Plate 2.

[Page 42], read Bruguieres; and for Pollicepes, read Pollicipes.

[Page 64], line 3, read Parmophorus—line 6, read Plate 3.

[Page 68], line 5 from bottom, read Carocolla.

[Page 76], line 6, for Valvata read Voluta.

[Page 90], line 4, read anglicanum.