34 INVERTEBUATE ANIMALS. 



gintlj Cable Case. 



The Mark If indicates specimens or other illustrations exhibited in the Cases. 



Group 97. —Family CASSIDID^ and allies, cassis, a 

 helmet. Estimated number of species : recent, 80 ; 

 British, ; fossil, 50. Cretaceous. 



H Examples of Cassis, Doliiim, Oniscia, Ficula, 



&c., including Moriim exquisitum. 

 Sconsia Barhudensis, Higgins and Marrat. 



Warrenia, new genus, W. harpcsformis, Higgins 

 and Marrat. Collected by Captain Cawne 

 Warren. 



Upper Compartment. 



Cameos in various stages (rough medallions, half- 

 finished, and completed), from the shells of 

 Cassis Madagascarensis and C. rufa. Pre- 

 sented by W. H. Tooke. Sections shewing 

 interior of shells. 



Group 98.— Family MARGINELLID^. margo, a rim. 

 Estimated number of species : recent, 412 ; British, 1 ; 

 fossil, 50. Cretaceous, &c. 



IT Marginella, Erato, Cokimbella, Engina. 

 Marginella Warrenii, Marrat. 

 M. halteata, Higgins and Marrat. 

 Strombina suhulata, Sow. 



Many species of Marginella are unsurpassed by any 

 other shells in beauty of form and finish. 



Group 99.— Family MITRID.E, Mitres. Estimated 

 number of species : recent, 4S9; British, 0; fossil, 100. 

 Cretaceous, &c. 



