270 INDEX. 



Cymothea, their food and mode of taking it, ii. 203 



Cyprsese, or cowries, shells of, ii. 234, 235 



Cypris, structure and mode of reproduction of,i 1 207, 208 



Cystopteris, characters and habitat of the genus, i. 348, 349 



Cystopus candidus, or Uredo Candida, structure, habitat, and mode of 



reproduction of, i. 278 

 Cystopteris fragilis, or brittle bladder fern, structure and habitat of, 



i. 349 



.Cystoseira, structure and habitat of, i. 255 

 Cystoseirese, habitat of, i. 255 

 Cyttaria, the food of the Fuegians, i. 292 

 habitat of the, i, 292 



D 



Dactylocalyx pumiceus, spicula and skeleton of, ii. 60 

 Daphnia pulex, or arborescent water-flea, structure and mode of repro- 

 duction of, ii. 208 

 Das}*a, structure of, i. 241, 242 

 Dasygloea, structure of, i. 215 

 Datura sanguinea, intoxicating effect produced by a drink obtained 



from, i. 427 



Davallia canariensis, or hare's-foot fern, i. 351 

 Davallieae, structure and habitat of, i. 350, 351 

 Dead bodies, agents in the decomposition of our, ii. 67 

 Decapoda, structure of, ii. 245 

 Decapods, tribes of the, ii. 188 



characters of the, ii. 189 

 Delesseria alata, structure of, i. 243 

 Delesseria angustissima, structure of, i. 243 

 Delesseria sanguinea, structure and habitat of, i. 239 

 Dematiei, structure of, i. 283 

 Dendritina elegans, form of, ii. 28 



structure of, ii. 32 

 Dendritine variety of the Peneroplis, characters and habitat of, ii. 32 



fossils of, ii. 33 



Dennstaedtia, indusium of, i. 350 

 Deparia prolifera, sorus and indusium of, i. 350 

 Desmidiacese, structure and development of, i. 191 et seq. 



their habitat, i. 195 



