INVERTEBRATE ANIMALS. 35 



IT Illustrations of most of the 21 generic and sub- 

 generic forms constituting this extensive and 

 highly ornate family of shells, found chiefly 

 in the Philippine Archipelago. 



Group 100.— Family VOLUTID^. Volutes. Estimated 

 number of species : recent, 100 ; British, ; fossil, 80. 

 Cretaceous, &c. 



IT Examples of Voluta, Cymba, Melo, including the 

 very beautiful and rare Lyria lyrceformis, 

 presented by S. Smith. 



Upper Compartment. 



Observe the highly coloured interior of V. Mthi- 

 opica, Dennison collection. 



Group 101.— Family TURBINELLIDiE and allies, turbo, 

 a top. Estimated number of species : recent, 118 ; 

 British, ; fossil, 48. Cretaceous, &c. 

 T'lirbinella, Fasciolaria, FastigieUa. 



upper Compartment. 



Armlets, made from the Chank- shell, worn by the 

 poorer Hindoos and Malays. 



Curious linear arrangement of egg-capsules, sup- 

 posed to belong to some species of the present 

 group. Presented by Captain Mortimer. 



Group 102.— Family DACTYLID^. Sa^TuAoj, a finger. 

 Three very characteristic sub-families are combined in 

 this group, the Olives, the Harps, and the Ancillae, all 

 tropical or sub-tropical in their distribution. It may be 

 noticed that the present and five preceding groups are 

 represented in British seas by a single species only, and 

 appeared not earlier than the chalk formation. Esti- 



