948 



PROTOZOOLOGY 



Nutrition — continued 

 zootrophic, 97 



Nyctobates pennsylvanica, 555 



Nvctotherus, 13, 804 



cordiformis, 198, 199, 805-806 

 ovalis, 29, 42, 43, 44, 62, 147, 804, 

 805 



Obelia commissuralis, 873 



geniculata, 873 

 Ocean pout, 655 

 Ocellus, 91, 310, 316 

 Ochromonadidae, 257, 264-266 

 Ochromonas, 264 



granulans, 264 



ludibunda, 264 



mutabilis, 264 

 Octolasium complanatum, 533 

 Octomitus, 392 

 Octomyxa, 434 

 Octopus letracirrhus, 694 

 Octosporea, 678 



muscae-domesticae, 677, 678 

 Ocular micrometer, 891 

 Odor produced by Protozoa, 9, 114 

 Oikomonadidae, 339, 343-344 

 Oikomonas, 343 



termo, 25, 28, 343 

 Oikopleura dioica, 321 

 Oil, 105, 113-114 

 Oligosaprobic Protozoa, 23 

 Oligotricha, 790, 814-826 

 Oncopeltus fascialus, 354 

 Ondatra zibethica, 395 

 Onychodactylus, 730 

 Onychodromopsis, 839 



flexilis, 839, 840 

 Onychodromus, 839 



grandis, 839, 840 

 Oocyst, 185, 571, 576, 599, 601 

 Oodinium, 321 



limneticum, 321, 323 



ocellatum, 321, 323 



poucheti, 321, 322 

 Ookinete, 187, 599, 601, 621, 623 

 Oospira, 791 

 Opalina, 13, 40, 685-686 



carolinensis, 687 



chorophili, 687 



hylaxena, 686 



kennicotti, 687 



obtrigonoidea, 686 



oregonensis, 687 



pickeringii, 687 



spiralis, 687 

 Opalinidae, 685-688 

 Opalinopsidae, 694 

 Opalinopsis, 694 



sepiolae, 694, 695 

 Opercular fibers, 63 

 Opercularia, 854 



plicatilis, 853. 854 



Opercularia — continued 



stenostoma, 853, 854 

 Operculariella, 854 



parasitica, 853, 854-855 

 Operculina, 501 



ammonoides, 501 

 Ophelia limacina, 693 

 Ophiothrix fragilis, 793 

 Ophisthotrichum, 822 



janus, 822, 823 



thomasi, 822 

 Ophiurespira, 793 



weilli, 792, 793 

 Ophrydiidae, 850, 852 

 Ophrydium, 39, 852 



ectatum, 851, 852 



sessile, 851, 852 



vernalis, 851, 852 

 Ophryocephalus, 870 



capitatum, 869, 870 

 Ophryocystidae, 560-562 

 Ophryocystis, 560-561 



mesnili, 561, 562 

 Ophryodendridae, 863, 867 

 Ophryodendron, 867 



belgicum, 866, 867 



porcellanum, 866, 867 

 Ophryoglena, 767 



atra, 768 



collini, 766, 767 



intestinalis, 766, 768 



parasitica, 767 



pyriformis, 766, 768 

 Ophryoglenidae, 758, 767-769 

 Ophryoscolecidae, 70, 119, 814, 816- 



822 

 Ophryoscolecin, 70 

 Ophryoscolex, 817 



bicoronatus, 817, 818 



caudatus, 817, 818 



quadricoronatus, 817, 818 

 Ophthalmidiidae, 499 

 Opisthodon, 723 

 Opisthonecta, 851-852 



henneguyi, 851, 852, 873 

 Opisthostyla, 854 



annulata, 853, 854 

 Opisthotricha, 832 

 Opossum, 349 

 Opsanus beta, 35, 653, 672 

 tau, 35, 653, 672 

 Oral basket, 71 

 groove, 685 

 membrane, 59 

 Orang-outang, 799 

 Orbitoides, 504 

 Orbitoididae, 504 

 Orbitolinidae, 499 

 Orbulina universa, 223 

 Orcadella, 432 



operculata, 431 

 Orcheobius, 590 



herpobdellae, 591 



