INDEX. 



805 



Nymph, . 

 Nymphon, 



Obelia, .... 

 Ocellatae, . . . .141 

 Ocelli, .... 

 Octacnemus, . 

 Octocoralla, . 

 Octodontidse, 

 /Dctopoda, 

 Vpctopus, 

 Oculomotor nerve, . 

 Odonata, 

 Odontoceti, . 

 Odontoid process, . 

 Odontoloe, . 

 Odontophora, see Glosso- 



phora, 

 Odontophore of Cephalopoda, 375 



,, Snail, . 



CEsophagus of Vertebrates, 

 Oikapleura, . 

 Olfactory lobes, 

 nerves, . 

 tracts, . 

 Oligochaeta, . 

 Oligosoma, 



Ollulanus, . . . .183 

 Omentum, 

 Ommastrephes, 

 Oniscus, 

 Ontogeny, 

 Ooze, Atlantic, 

 Opalina, 

 Opalinopsis, . 

 Operculum of Gasteropods, 



Limulus, . 



Scorpion, 



Teleostei, 



Opheosaurus, 

 Ophidia, 



Classification of, 

 Ophiocoma, . 

 Ophiophagus, 

 Ophiopholis, . 

 Ophiothrix, . 

 Ophiuroidea, . 

 Ophryodendron, 

 Ophryotrocha, 

 Ophthalmosaurus, . 



