INVERTEBBATE ANIMALS. 35 



Family BUCCINID^. huccinum, a trumpet. 



Group 103.— Sub-family PURPURIN^ and allies, pur- 

 pura, purple. Estimated number of species : recent, 

 178 ; British, 1 ; fossil, 42. Tertiary. 



H Examples of Purpura, Ricinula, Concholepas, 

 Separatista, Pinaxia, &c., comprising a rare 

 variety of Rapana Matvcs ; Pseudoliva KellettiL 

 Remarkable specimen of -Ricinula clathrata, 

 Dennison collection. 



upper Compartment. 



Group of many Magilus antiquus, in coral, Capt. 



JiNMAN. 



Group 104.— Sub -family NASSIN^ and allies. nassa, 

 a basket. Estimated number of species : recent, 553 ; 

 British, 7 ; fossil, 150. Tertiary. 



IT Examples of Buccinum, Nassa, Ehurna, Phos, 

 &c., including a very fine series of Ehurna, 

 one species only wanting. S. Smith. 



Group 105.— Family TRITONID^. Tritons. Estimated 

 number of species: recent, 165; British, 0; fossil, 68. 

 Tertiary. 



IT Examples of Triton, Ranella, Persona, &c. 



Group 106.— Family PLEUROTOMID^. TrXsvpoc, side; 

 t6[xos, a notch. Estimated number of species : recent, 

 491 ; British, 15 ; fossil, 300, Cretaceous, &c. 



^ Examples of Pleurotoma = Turris, Mangelia, &c. 

 Large number of generic forms. 



