316 



SEXUAL DIMORPHISM 



PycrafVW., on the throat pouch of the 

 Bustard, 153 



Quatrefages, on influence of climate 



upon hair, 52 

 Quezal, 137 



Raffaele, on eggs of Labridae, 220 

 Raia clavata, 180 ; R. microcellata, 



maculata, radiata, circtdaris, batis, 



181 

 Rallinae, 118 



Rana temporaria, escidenta, 175 

 Rangifer, 90 

 Ratitae, 160 

 Rays, 180 



Rhea Darwinii, 161 

 Rhinocerus, 51 

 Rhinoderma Darwinii, 176 

 Rhomboidichthys angustifrons, 197 

 Rhynchma australis, 156 

 Ridgway, on the White Pelican, 160 

 River hog, 106 



Recapitulation in development, 21 

 Reindeer, 90 



Relation de l'lle Rodrigue, 130 

 Reptiles, 165 ; evolution of, 21 

 Romanes, G. J., on natural selection, 



13 ; summary of Wallace's objections 



to sexual selection, 25, 26 

 Rossia, 292 

 Rupicola crocea, 142 

 Rusconi, on courtship of salamanders, 



172 

 Ryder, on copulation of Gambusia, 



134 



Sacconereis, 303 



Salatura genestia, 229 



Salmonidae, 183 



Salvin, Oshert, on incubation of the 



Quezal, 137 ; on caruncles of Ohas- 



morhynchus, 144 

 Sambar, 78 



Sars, on Onathia maxillaris, 273 

 Saturniidae, 250 

 Satyrus semele, 246 

 Saville Kent, on spawning of Cantha- 



rus lineatus, 198 ; on courtship of 



Labrus mixtus, 320 ; on courtship of 



Dragonet, 200 

 Sccdpellum ornatum, vulgare, 284 

 Scarabaeidae, 253 

 Schomburgk, R., on display of Rupicola, 



142 

 Schreiner, Conrad, on habits of ostrich, 



161 

 Sclater, P. L., on colour of Chasmo- 



rhynchus, 145 



Scolopacidae, 154 



Scolopax, 141 



Scorpaenidae, 199 



Seals, 51, 65 



Secondary sexual characters, 32 



Sedgwick, A., theory of development, 19 



Semitic races, 47 



Sepia, 292 



Sexual selection, 24, 30 



Sharp, David, on the horns of Coleo- 



ptera, 254, 255 

 Siluridae, 182 

 Singing-birds, 151 

 Siphonostoma, 226 

 Sirenia, 51 



Skate, Common Blue, 181 

 Skertchley, on pairing of Ornithoptera 



brookiana, 249 

 Snakes, 18 

 Snipes, 154 

 Solenestoma, 227 

 Soles, spawning of, 191 

 Solitaire. 127 

 Somateria, 158 

 Sparidae, 197 

 Sparrow-hawk, 151 

 Species, 7 



Specific characters, 8, 9 

 Spermatozoon, 35 

 Sperm whale, 73 

 Spirula, 292 



Sponges, reproduction of, 286 

 Stag-beetles, 255 

 Steindachner, on sexes of Curls jidis, 



222 

 St. Hilaire, Geoff., and Cuvier, on the 



Mandrill, 56 

 Sticklebacks, 217 

 Stimulation, 14 

 Stolzmann, on origin of secondary 



sexual characters, 29 

 Suidae, 106 

 Surinam toad, 177 

 Swaddling clothes, 53 

 Swinhoe, on habits of Hypolimnas 



misippus, 235 

 Syllidie, 295, 300 

 Syllidinae, 301, 303 

 Symmetry, radial and bilateral, 5 

 Syngnathus, 226 

 Sypheotides auritus, 141 



Tadpole, 20 

 Teeth of birds, 18 

 Teleostei, 182 

 Tench, 186 



Tetrao, Tetraoninae, 115 

 Thomson, Arthur, and Geddes, on 

 sexual dimorphism, 34 



