INDEX 



177 



Reversed shells, 97 



vertebrae, 97 



Rhacophorus ; 92, 95, 134 

 Rheostatic organs, 162 

 Rhinoderma,) 132 

 Rhinophrynus , 102 

 Rhodosoma, 84 

 Rodentia, 56, 79 

 Rotifers, 155 



SACCOBRANCHUS, 141, 145 



Salarias, 140 



Sarasin, P. and F., 142 



Sarcodaces, 136 



Sauropsida, 72, 137 



Schimkewitsch, W., 99 



Scombresocidae, 88, 155 



Scorpion, 29, 164 



Scylltza, 40 



Seasonal flights, 27 



Sedgwick, A., 42, 87, 126 



Semper, K., 18, 37, 52, 88 



Sensory convergence, 158-163 



Sessile animals, 36 



Seton, E. T., 92 



Shelford, R. , 49 



Siluridae, 131, 141 



Sinistral shells, 98 



Situs tnversus, 97 



Snakes, 49, 67, 93, 116, 164 



Social insects, 119 



Solenocytes, 154-157 



Somites, 77 



Spengel, J. W., 144, 158, 169 



Sphcerodema, 134 



Spiders, 148 



Sponges, 36, 167 



Spurious convergence, 81 



Statozoa, 37 



Stenta, M., 162 



Stereotropism, 38, 122, 143 



Sting-rays, 1 06 



Strobilation, 77, 78 



Stylactis, 117 



Substitution, 14, 143, 169 



Surinam toad (see Pipa) 



Swarming habits, 43, 129 



Synaposematic, 55 



TADPOLE, 42 



Tagetis, 60 

 Teats, 125 

 Teeth, 12 

 Teleostei, 88, 112 

 Tennent, Sir E., 48 

 Termites, 63, 120 

 Testacella, 31 

 Thiele, J., 159, 161 

 Thompson, D'Arcy W., 99 

 Thyroid gland, 163, 164 

 Tilapia nilotica, 132 

 Toads, 22, 92, 101 

 Topography, 165 

 Tornaria, 42, 123 

 Tracheae, 148 

 Tracheata, 148 

 Triploblastica, 77 

 Trophoblast, 16, 103, 128 

 Tropism, 20, 22, 169 

 Tubificidae, 118 

 Tunicata, 72, 84, 155, 163 

 Types, 9 



UEXKULL, J. von, 20 

 Ungulates, 104 



VARANUS, 50 



Variation, 58, 60, 62 



Veliger, 41 



Vertebrae, 96 



Vertebrata, 13, 81, 85, 158 



Verworn, M., 21 



Viability, 146 



Visceral clefts (see Gill-clefts) 



Viviparity, 124 



Viviparous rays, 106 



WALLACE, A. R., 53, 58 



Warning coloration, 54 



Wasmann, E., 120, 121 



Water-breathers, 19 



Weiss, F. E., 153 



Whitman, C. O., 46 



Whitmee, S. J., 129 



Willey, A., 16, 64, 124, 125, 135, 



ISO 



Windowpane-oyster, 158 



Wings, 89 



ZOOPHYTES, 35 



M 



