INVERTEBRATE ANIMALS. 41 



H Examples of Orthalicus, Bulimulus, &c. For 

 the geographical distribution of the Bulimi, 

 see the tablets. 



Note the delicate texture of the shells in "the paper 

 Bulimi, Orthalicus ; the grotesque shapes in 

 Otostomus ; the form, texture, and colour in 

 Aspastus. 



Group 118.— Sub-family BULIMIN^. Part II. The 

 Helices of the Philippine Islands are rivalled by the 

 Bulimi of the same region, e.g., B. irroratus, and B. 

 malleatus. Estimated number of species ; recent, 230 ; 

 British, ; fossil, 30. Tertiary. 



H Examples of Cochlostyla, Bulimus, Partula, &c. 



upper Compartment. 



B. ovatus, and other Bulimi, with their eggs. 



Group 119.— Sub-family ACHATININ^ and allies. 

 achates, an agate. Estimated number of species : recent, 

 344 ; British, 3 ; fossil, 14. Tertiary. 



IT Examples of Achatina, Succinea, Achatinella, 

 Simpulopsis, &c. 



Upper Compartment. 



Some of the larger Achatina, chiefly an African 

 genus, fully equal in size the largest Bulimi 

 of the western hemisphere. 



Group 120.— Family OLEACINID^ and allies, olea, an 

 olive. The present is a very heterogeneous group, but 

 all the most important forms are illustrated. Estimated 

 number of species : recent, 503 ; British, 16; fossil, a 

 few. Tertiary. 



