790 



INDEX 



Pythagoras 2, 509, 651, 720, 779 



Quadrant, bisection of 359 

 Quekett, J. T. 423 

 Quetelet, A. 61, 78, 93 

 Quincke, G. H. 187, 191, 279, 421 



Rabbit, skull of 764 



Rabl, K. 36, 310 



Radial co-ordinates 730 



Radiolaria 252, 264, 457, 467, 588, 607 



Rainey, George 7, 420, 431, 434 



Rainfall and growth 121 



Ram, horns of 613-624 



Ramsden, W. 282 



Ramulina 255 



Rankine, W. J. Macquorn 697, 712 



Ransom's waves 164 



Raphides 412, 429, 434 



Raphidiophrys 460, 463 



Rasumowsky 683 



Rat, growth of 106 



Rath, 0. vom 181 



Rauber, A. 200, 305, 310, 380, 382, 398, 



677, 683 

 Ray, John 3 

 Rayleigh, Lord 43, 44 

 Reaumur, R. A. de 8, 108, 329 

 Reciprocal diagrams 697 

 Rees, R. van 374 

 Regeneration 138 

 Reid, E. Waymouth 272 

 Reinecke, J. C. M. 528 

 Reinke, J. 303, 305, 355, 356 

 Reniform shape 735 

 Reticularia 569 

 Reticulated patterns 258 

 Reticulum plasmatique 468 

 Rhabdammina 589 

 Rheophax 263 

 Rhinoceros 612, 760 

 Rhumbler, L. 162, 165, 260, 322, 344, 



465, 466, 589, 590, 595, 599, 608, 



628 

 Rhynchonella 561 

 Riccia 372, 403, 405 

 Rice, J. 242, 273 

 Richardson, G. M. 416 

 Riefstahl, E. 578 

 Riemann, B. 385 

 Ripples 33. 261, 323 

 Rivularia 300 

 Roaf, H. C. 272 

 Robert, A. 306, 339, 348, 377 

 Roberts, C. 61 



Robertson, T. B. 82, 132, 191, 192 

 Robinson, A. 681 

 Rorig, A. 628 

 Rose, Gustav 421 

 Rossbach, M. J. 165 



RotaUa 214, 535, 602 



Rotifera, cells of 38 



Roulettes 218 



Roux, W. 8, 55, 57, 157, 194, 378, 



383, 666, 683 

 Ruled surfaces 230, 270, 582 

 Ruskin, John 20 

 Russow, — 73, 75 

 Ryder, J. A. 376 



Sachs, J. 35, 38, 95, 108, 110, HI, 



200, 360, 398, 399, 624, 635, 640, 



651, 680 

 Sachs's rule 297, 300, 305, 347, 376 

 Saddles, of ammonites 583 

 Sagrina 263 



St Venant, Barre de 621, 627 

 Salamander, sperm-cells of 179 

 Salpingoeca 248 

 Salt, crystals of 429 

 Salvinia 377 

 Samec, M. 434 



Samter, M. and Heymons 130 

 Sandberger, G. 539 

 Sapphirina 742 



Saville Kent, W. 246, 247, 248 

 Scalaria 626, 547, 554, 557, 559 

 Scale, effect of 17, 438 

 Scaphitcs 550 

 Scapula, human 769 

 Scarus 749 

 Schacko, G. 604 

 Schaper, A. A. 83 

 Schaudinn, F. 46, 286 

 Scheerenumkehr 149 

 Schewiakoff, W. 189, 462 

 Schimper, C. F. 502, 636 

 Schmaltz, A. 675 

 Schmankewitsch, W. 130 

 Schmidt, Johann 85, 87, 118 

 Schonfiies, A. 202 

 Schultze, F. E. 452, 454 

 Schwalbe, G. 666 

 Schwann, Theodor 199, 380, 591 

 Schwartz, Fr. 172 

 Schwendener, S. 210, 305, 636, 678 

 Scorpaena 749 

 Scorpioid cyme 502 

 Scott, E. L. 110; W. B. 768 

 Scyromathia 744 

 Searle, H. 491 

 Sea urchins 661; egg of 173; growth 



of 117, 147 

 Sebastes 749 



Sectio aurea 511, 643, 649 

 Sedgwick, A. 197, 199 

 Sedillot, Charles E. 688 

 Segmentation of egg 57, 310, 344, 382, 



etc.; spiral do., 371, 453 

 Segner, J. A. von 205 



