842 



INDEX. 



Scincus, 549. 



Sciuridce, 759, 760. 



Sciuropterus, 760. 



Sciurus, 759. 



Sclerenchyma, 159. 



Sclerites, 170. 



Sclerobasica (Zoantharia), 154, 157, 185. 



Sclerobasic corallum, 158, 159. 



Sclerodermata (Zoantharia), 154, 168; 



divisions of, 164, 165. 

 Sclerodermic corallum, 159, 160. 

 Sclerogenidce, 488. 

 Sclerostoma, 245, 246. 

 Scolecida, 227 ; characters and divisions 



of, 229 et seq. 

 Scolex, 232, 233, 234, 235. 

 Scolopacidce, 611. 

 Scolopendra, 329, 330. 

 Scomberidce, 488. 



Scorpion, 314, 316, 317, 323, 324, 327. 

 Scorpion-flies, 351. 



Scorpionidce, characters of, 324; distribu- 

 tion of, in time, 327. 

 Screamer, 609. 

 Scutigera, 329. 

 Scyllaridce, 277. 

 Scyphisto r >na, 140. 

 Scythrops, 620. 

 Sea-anemones, 154. 

 Sea-cows, 681. 

 Sea-cucumbers, 218. 

 Sea-firs, 121. 

 Sea-hares, 412. 

 Sea-horses, 488. 

 Sea-lemons, 413. 

 Sea-mouse, 267, 270. 

 Sea-otter, 745. 

 Sea-pens, 167. 

 Sea-shrubs, 169. 

 Sea-slugs, 412. 

 Sea-spiders, 319. 

 Sea-worms, 267. 

 Seals, 737, 738. 

 Secretary Bird, 633. 



Segmental organs of Leeches, 260 ; of 

 Earthworm, 263 ; of Errant Annelides, 

 258. 



Selachii, 498. 



Selenaria, 374. 



Selenodonts, 703. 



Semnopithecus, 778. 



Sepia, 425, 435. 



Sepiadce, 429, 437. 



Sepiola, 419,435. 



Sepiostaire, 425. 



Septa, of Corals, 160 ; of the shell of Tetra- 

 branchiate Cephalopods, 431, 433. 



Serpentarius, 633; 



Serpents (see Snakes). 



Serpula, 264, 265, 266. 



Serpulites, 271. 



Sertularia, 122. 



Sertularida, 111, 112 ; characters of, 121 ; 

 hydrothecae of, 122 ; polypites of, ib. ; 

 reproduction of, 123, 124 ; distribution 

 of, in space and time, 150. 



Setse of Annelides, 258, 259, 263, 264, 267. 



Sexual selection, 49, 50. 



Sharks, 473, 477, 494, 495, 497, 498, 499, 

 506. 



Sheat-fishes, 486. 



Sheep, 719, 720. 



Sheep-ticks, 355. 



Shell of Mollusca, 368-370 ; of Brachio- 

 poda, 388, 389 ; of Lamellibranchiata, 

 396-399; of Gasteropoda, 409-411; of 

 Heteropoda, 414; of Pteropoda, 417; of 

 Argonauta, 426, 427 ; of Nautilus, 426, 

 431 ; of Tetrabranchiate Cephalopods, 

 432. 



Sheltopusiks, 548. 

 Shield-slaters, 305. 

 Ship-worm, 404. 

 Shoveller, 606. 

 Shrew-mice, 768. 

 Shrew-mole, 767. 

 Shrikes, 626, 627. 

 Sialidce, 351. 

 Siamang, 780. 

 Sieboldia, 517. 

 Silicispongice, 88, 89, 93. 

 Siluridce, 486. 

 Silurus, 486. 

 Simia, 780. 

 Simosaurus, 562. 

 Sinupalliatia, 401, 403. 

 Siphonia, 93. 

 Siphonida, 403. 

 Siphonophora, 111 ; characters of, 131 ; 



divisions of, 131 et seq. 

 Siphonops, 514, 515. 



Siphonostomata (Gasteropoda), 410, 411, 

 416. 



Siphons, of Lamellibranchiata, 401 ; of 

 Gasteropoda, 508. 



Siphuncle, of the shell of Nautilus, 426, 

 431, 432, 433 ; of Spirilla, 429 ; of fielem- 

 nites, 430 ; of Tetrabranchiata, 433 ; of 

 Orthoceras, 434. 



Sipunculoidea, 255. 



Sipunculus, 255, 256. 



Siredon, 516, 517 



Siren, 512, 515, 516. 



Sirenia, 640, 643, 646 ; characters of, 680 

 et seq. ; distribution of, in time, 683. 



Sirenidce, 515. 



Sirenoidei (Dipnoi), 503. 



Sirex, 359. 



Siricidce, 357. 



Sitta, 627. 



Sivatherium, 712, 723. 



Skates, 473, 499. 



Skink, 549. 



Skunk, 744. 



Slaters, 305. 



Sloth, 640, 641, 673, 674, 675. 



Sloth-animalcules, 320. 



Slow Lemurs, 774. 



Slow-worm, 548. 



Slugs, 414, 415. 



Smynthurus, 346. 



Snails, 414. 415. 



Snake-birds, 605. 



Snakes, 527, 537, 538, 539, 540, 541, 542, 

 543, 544, 545. 



Snapping-turtle, 536. 



Snipe, 611. 



Soft Tortoises, 535. 



Solanocrinus, 223. 



Solaster, 205. 



Sole, 486. 



Solenidce, 404. 



Solenodon, 725. 



