246 



INDEX. 



Mouth of Stenopterus, 83 



NAVICTJL.E, 49 

 Notonecta, 103 

 Nummulites, 206 

 Necteribia, 206 



OPOMYZA, 136 

 Ornithomyia, 155 

 Operculina, 204 

 Orbitolites, 206 



PALATES OF MOLLUSCS, 166 



Helix pomatia, 166 



Aspersa, 167 



Hortensis, 167 



Neinoralis, 167 



Rufescens, 168 



Virgata, 168 



Nitida, 168 



Limax (slug), 167 



Whelk, 168 



Purpurea, 169 



Nassa, 169 



Trochufl, 169 

 crassus, 170 



Periwinkle, 170 



Haliotes, or Aumer, 170 



Pleurobranch, 171 



Aplysia, 171 



Doris, 171 



Limpet, 171 



Chiton, 172 



Nevite, 172 



Lymneus, 172 



Planorbis, 173 



Paludina, 173 



Cyclastoma, 173 

 Parasites, 150 

 Polarized light, 222 



Selenite,-223 



Rhinoceros horn, 224 



Whalebone, 224 



Elytra dytiscus, 224 



Cuticle of Deutzia leaf, 224 



Section of Quartz, 225 



List of polarizing objects, 225 

 Phora, 138 

 Phragmidium, 42 

 Pleurosigma, 49 

 Pollen, 29 



Mallow, 26 



Pollen, Hollyhock, 26 



Passion-flower, 26 



(Enothera, 26 



Epilobium, 26 



Tulip, 26 

 Pollen-tubes, 29 

 Proboscis of Bee, 68 



of Wasp, 69 



of Butterfly, 70 



of Blow-fly, 71 



of Tabanus, 71 



of Gnat, 72 



of Asilus, 73 



of Empis, 74 



of Dioctria, 74 



of Conops, 74 



of Rhingia, 75 

 Ptychoptera, 129 

 Puccinia, 42 

 Pustulipora (fossil), 187 



RAPHIDES, 21 



Reduvius, or bed bug, 112 



SALT of Bruccia, 238 



Saw-fly, 115 



Scatophaga, 130 



Scalariform vessels, 25 



Seeds, Poppy, 30, 



S\\ eet-william, 30 

 Silene, 30 

 Orchis, 30 



Seaweeds, 189 



fructification of, 191 

 Fucus, 191 

 Callithamnion, 193 

 Ceramium, 194 

 Ptilota plumosa, 194 

 Plocamiuin, 195 

 Polysiphonia, 196 

 Spharococcus, 196 

 Griffithsia, 197 

 Gracillaria, 197 

 Laurentia, 198 

 Odonthalia, 199 

 Bonnemaisonnia, 199 

 Delesseria, 199 

 Rhodomela, 200 

 Spyridia, 200 

 Chsetospora, 200 

 Halcymenia, 201 



