INDEX. 379

Pycnogonum, 121

Quatrefages, his works, 105, n. ;109, n.; 109, n. 1; 110, n. 1; 117,n. 2; 122, n. 1; 163, n. 2Quenstedt, his works, 142, n. 4; 144,n. 1; 145, n. 1

Quetelet , his work, 133, n. 1Radiata, a primary division of theanimal kingdom,40; their classes,106Rang, see Sander-RangRangeof distribution of animals, 31, n.Rathke, his works, 103, n. 1; 111, n.1; 119, n. 2; 120, n. 1; 121, n. 1;122, n. 1; 124, n. 1 and 2; on theembryology of Articulata, 130Ratzeburg, his works, 85, n. 2; 188Reality or ideality of the existence ofspecies, genera, families, etc., 252Recapitulation, 199-206Reaumur, his work, 85, n. 1; 213Reeve (Lovell), his work, 44, n. 3Reichert, his works, 102, n. 1; 122,n. 1; 124, n. 2Reid, his paper, 111, n.

Relations between animals and plantsand the surrounding world, 84-94Relations between the structure, theembryonic growth, the geologicalsuccession, and the geographicaldistribution of animals, 181-185Relation of Individuals to one ano-ther, 94-99

Relative standing of the four branchesof the animal kingdom, 38Remak, his work, 124, n. 2Reptiles, their standing, 40; a distinctclass of Vertebrata , 124Representative species in the succes-sive geological periods, 81Retzius, his work, 122, n. 1Reuss, his work, 142, n. 4Revolutions (The) of the members ofour Solar System compared to thearrangement of leaves in plants, 192Rhizopoda , their true nature stilldoubtful, 113, probably Algse , 289Richardson (Sir John), his works,45, n. 2

Ridinger, his works, 97, n. IRobin (Ch.), his work, 186, n. 1Roget , Bridgwater Treatise, 11, n.Romer (F. A.), his work, 142, n. 4;

144, n. 1; 145, n. 1Roquan, his work, 145, n. 1Rotifera are Crustacea , 164

Rosel, his works, 100, n. 1; 124, n. 2;213

Rouget, 104, n.

RouLiN,his paper, 111, n. 1Roux, his work, 142, n. 4Rudolphin, his works, 45, n. 1Rugosa, 162; their affinities, 170, n.Ruppell, his paper, 190, n. 3Rusconi, his works, 122, n. 1; 124,n. 2Salpce, 138

Salter, his paper, 145, n. 1Sandberger (G. & Fr.), their works,142, n. 4

Sander-Rang, his work with Fjbnis-sac, 44, n. 3

Sars, his works, 103, n. 1; 109, n.;

110, n. 1; 113, n. 2; 138, n. 1Saussine (H. de), his paper, 120, n. 1Savigny , his works, 24, n. 2; 108, n. 3Scheitlin, his work, 88, n.Scheuchzer, his work, 142, n. 3Scheuter (A.), his paper, 121, n. 1Schimper, his work, 150, n. 2Schlegel (Fr.), his work, 98, n.Schlottheim, his work, 141, n. 1Schmarda, his work, 19, n.; 48, n.;118, n. 1

Schmerling, his paper, 145, n. 1Schmidt (A.), his paper, 116, n. 2Schmidt (0.), his paper, 109, n. 1;110, n. 1

Schneider, his paper,111,n.; 113,n.2Schouw, his work, 19 n.

Schubert (T. D.), his paper, 121, n. 2Schubler, his work, 133, n. 1Schultze (M.), his works, 105, n.;106, n.; 110, n. 1; 113, n. 2; 117,n. 2; 122, n. 1; 290, n.

Science, its true limits, 13, 281Scilla (Ag.), his work, 142, n. 2Scincoids, their classification and geo-graphical distribution, 65Sedgwick, his works, 32, n. 1Selachians, a distinct class of Verte-brata, 123, n. 1; first distinguishedby Aristotle , 302

Semper, his papers, 111, n.; 120, n.1; 121, n. 2

Series in the animal kingdom, 20, 34,36, 38, 40, 69, 343

Serial connexion among animals, 64-69

Sexual relations among animals con-sidered as a criterion of specific dif-t ferences, 250