C R U C I B U L U M. 



nm-iculatuiu {Patella), Chemnitz 



iuiritum, Reeve 



coiicameratum, Reeve 

 comigatum, Carf enter . 

 cxtinctorium, Lamarck . 

 fernigineum, Reeve ... 

 imbiicatum {Calyp.), Biodei 



lividum, Reeve 



morbiduni. Reeve 



pectinatum, Carpenter. 

 ladiatura {(hhjp.), Broderip 

 nigo^nm (Vulyp.). Deshaye 



V. 



VI. 



VTI. 



III. 



V. 



II. 



III. 



VII. 



VII. 



V. 



VI. 



II. 



'is 



17 



servatuiu, {Cahjp.), Broderip . . VII. 



scutellatum {Calyp.), Gray I- 



sordidum {Calyp), Broderip . . . VII. 



spectrum, Reeve ^• 



spinosura {Calyp), Sowerby. . . IV. 



striatum {Calyp), Say VI. 



tenue {Calyp), Broderip I. 



trigonale {Calyp), Ad. and Eeevp I. 



umbrella {Calyp), Deshayes . 11. 



verrucosum, Reeve VI. 



violaceura, Carpettter V. 



ERRATUM. 



Plate I.— The deseriptiou? of Species 1 and 2 shoidd be transposed. 



