Cypra^a, mauritiana 



moneta 



mus 



pantherina 



princeps - 



pustulata 



rhinoceros 



scottii 



testudinaria 



tigris - 



turd us 



umbilicata 

 Gyre n as 



Cytherea lupinaria 

 Cuttle-bone - 

 Cuttlefish 



Decapoda 

 Decollated shells 

 Deep sea animals 



animals, eyes of 



animals, operculum of 



animals, organs of 



pressure of 



temperature of water of 

 Dentalium 



elephantinum 



entalis 

 Devil fish 

 Dibranchiata 

 Distoma - 

 Distribution of mollusks 



agencies 

 Dog whelks 

 Dolium 



perdix 

 Donax 

 Doris 



tuberculata 

 Dove shells 

 Dredge, description of 

 Dredging, difficulties of 



method of 



specimens obtained by 

 Drill - 



anatomy of 



boring of in clams 

 Duckweed 

 Dye, purple, of Murex 



Eburnea - 



Eggs of snails, calcareous 

 Ensis directus 

 Epiphragm of helices 

 Epiphragm of pond snail 

 Epiphragmophora fidelis 



169 



