^ Figuig, Feb. 160. 
by Sir John Lubbock, 451. 
on the Plum Curculio, 1105. 
on Putorim viton, Webster, Mar. 
lex. 1 133 
Orthis, 991. 
Orthisina, 991. 
Orthoceras, 1085. 
Orthoclase, 628, 906. 
Orthopoda, 864, 
Orycteropodidae, 657, 876. 
Orycteropus, 658. 
Osborn, H. F., The Paleontological EtI- 
dence for the Transmission of 
Acquired Characters, 561. 
Oliogolophus, 1101. 
pictua, 1101. 
Olivine and Augito, Alterations of, ] 
Omosauridae, 864. 
Oniscus, Ovum of, 762. 
On Inheritance in Evolution, Cope, 1058. 
Ontogeny of Ampullaria, 735. 
of Crangon, 737. 
of Girdles, 914. 
of Lepidosteus, 1018. 
of Sepia, 
Opal, Fire, 81 J 
Opegrapha felic 
Ophidia, 866, 868. 
Ophiocephalidce, 860. 
Ophiopteron elegans, 267. 
Ophitic Band of Andalusia, 626. 
Ophiura, Variation in, 919. 
Opisthomi, 859, 860. 
Opisthocomi, 871, 873. 
Opisthocomidie, 873. 
Orbiculoidea, 983. 
Ostracion, 945. 
Ostracodermi, 852. 
Otariidte, 876. 
Otididae, 872. 
OtiosuB, 460. 
Ottrelite, 722. 
Our Injurious Mgei 
Ovum, Segmentation of. 
Owl, History of, 832. 
Oysters in France, 826. 
Palamedeidce, 872. 
Palmohatteria longicatidata, M 
Palseolagus turgidut, Mar. 151 
Palifionianis, 658. 
Paheomeryx, Mar. 125, 127. 
Palasopicrite, 438. 
Palffiotheriida, 877. 
PalsBohatteriidse, 866. 
Palaeozoic, 44. 
Oregon, Region of Silver Lake, 970. 
Oreodontidise, Mar. 166, 877. 
OreopUhecus bambolii, 437. 
Origin and Meaning of Sex, Ryd 
PantodontidiB, 877. 
Pantolambdidae, 87' 
Pantolestidae, Mar. \ 
Pantotheria, 876. 
of Vertebrate Nervous System, 938. 
of the Vertebrate Pelvis, 267. 
Original Research inPenn., 243. 
Ornithopappi, 869. 
Ornithorhynchidae, 874. 
Ornithosauri, 863, 864. 
Parasite, 1091. 
Parasite Castration of Typlocybae, 1 
Parasite of Cosmopolitan Insccto, 4 
Parasuchia, 865. 866. 
Pariasauridae, 866. 
Pariotichidse, 866. 
