934 



tern, 273, 279 ; circulatory 

 system, 274, 276 ; digestive 

 system, 275 ; nervous sys- 

 tem, 277 ; embryo, 278. 



Rajadae, 430. 



Rana, dissection of, 74-79 ; 

 parasites in, 75 ; circula- 

 tory system, 76 ; digestive 

 system, 78 ; urogenital 

 system, 78 ; skeleton of, 

 79-83 ; plate and descrip- 

 tion, 268-271. 



Rat, v. Mus decumanus. 



Ratitae, 374, 380. 



Receptaculum capitis, 230 ; 

 ovorum, 206, 317. 



Rectal gland of Elasmo- 

 branchii, 421. 



Rectal respiration of Insecta, 

 504 ; of Crustacea, 536. 



Redia, 651. 



Regeneration of lost parts, 

 Oligochaeta, 208 ; cf. 608 ; 

 Echinodermata, 548. 



Rejuvenescence, 256, 822. 



Renal organ, Astacus, 185. 



Renal-portal system, 353 ; 

 Aves, 56 ; Teleostei, 88 ; 

 Rana, 77 ; Tropidonotus, 

 70. 



Reptantia, 482. 



Reptilia, 381-393 ; v. Tropi- 

 donotus, Python. 



Respiratory trees of Holo- 

 thuroidea, 547, 552, 553. 



Reticularia, 884. 



Rhabdites, 667. 



Rhabdocoelida, 673. 



Rhabdoliths, 894. 



Rhabdopleura, 711. 



Rhinatrema, 408. 



Rhizopoda, 866 ; v. Amoeba. 



Rhizostomae, 788. 



Rhombogen, 815. 



Rhombozoa, 814. 



Rhopalia, 782, 784. 



Rhopalocera, 157. 



Rhopalura, 813. 



Rhynchobdellidae, 212, 632. 



Rhynchoflagellata, 852. 



Rhyncholites, 461 n. 



Rhynchota, 510. 



Rhynobatis, 429 n. 



Ribs, Vertebrata, 340. 



Rod-cells oiPetromyzon,4^. 



Rodentia, classification, 8, 

 39 ; palaeontology and 

 affinities, 39-45 ; 368 ; v. 

 Mus, Lepus. 



Root cells, Polyzoa, 238. 



Rosette plates, Polyzoa, 235. 



Rostellum, Taenia, 224, 225. 



Rostrum, 163, 170. 



INDEX. 



Rotalidae, 895. 

 Rotifera, 632-635. 

 Rotteken's ring-muscle, 240 ; 



734- 



Rugosa, 743. 

 Ruminantia, 368. 



S. 



Saccocirridae, 609. 



Saccule, 347. 



Sacculus rotundus, 28. 



Sacrum, Aves, 59, 63. 



Sagitta of ear, 86. 



Sagitta, 674. 



Sagittocysts of Turbellaria, 

 667 n. 



Salamandrina, 408. 



Salivary glands, Helix:, 113, 

 116; Periplaneta, 139, 

 143; Sphinx larva, 150. 



Salpa, 447. 



Salpidae, 447. 



Saprophytic, xx, 820. 



Sarcosepta, 239. 



Sarcosporidia, 862. 



Sauropsida, 372. 



Saururae, 380. 



Scales, Ophidia, 67; Tele- 

 ostei, 85 ; of Pisces, 411. 



Scaphium, 158. 



Scaphopoda, 466-467. 



Scapho-lunar, v. Carpus. 



Scaphoid, v. Carpus, Tarsus. 



Scapula, v. Shoulder-girdle. 



Schizocoele, xxx. 



Schizogenes, 921. 



Schizognathism, 63. 



Schizonemertea, 641. 



Schizopoda, 540. 



Scissiparity, 241, 741. 



Sclerites, cervical, 141 n. 



Sclerotic bones, 58, 375, 386. 



Sclerotium (Mycetozoa), 909. 



Scolex, 225, 231-233, 326, 

 656 ; v. Taenia. 



Scolopendra, figure, etc. of 

 appendages, 302. 



Scolopendrella, 299, 519. 



Scorpionidae, 529. 



Scrotum, 356, 366, 369. 



Scyphomedusae, v. Acra- 

 speda. 



Scyphostoma, 745, 781. 



Scytodermata = Holothuroi- 

 dea, 549. 



Scytophorus, 735. 



Sea Anemone, v. Tealia. 



Sea Fir, v. Sertularia. 



Seasonal dimorphism, 238. 



Segmental duct, Vertebrata, 

 354- 



Segmental papillae, Hirudo, 

 212-214, 628. 



Selachoidei, 430. 



Self-impregnation, 631, 648, 

 662, 680. 



Semitae, 558. 



Semostomae, 788. 



Scraper's organ, 282. 



Septa, Lumbricus, 196, 199; 

 of Chaetopoda, 597 ; of 

 Leech, 631 ; of Madrepo- 

 raria, 738, 739. 



Serictaria, 150. 



Sertularia, 245-249 ; exter- 

 nal characters, 245, 246. 



Setae, coxopoditic, Astacus, 

 182; stomachal, 183; of 

 Chaetopoda, 594; of Chi- 

 ton, etc., 470 ; of Brachio- 

 poda, 692, 696, 701. 



Sexual dimorphism, 238. 



Shell gland of Mollusca, 449, 

 454 ; of Crustacea, 494, 

 536 ; of Trematoa, 647 ; 

 of Cestoda, 66 1. 



Shell of Helix, 107 ; Ano- 

 donta, 124 ; Mollusca, 449. 



Shoulder-girdle, Aves, 60, 

 64; Rana, 81, 82; Tele- 

 ostei, 95, 97 ; Vertebrata, 



34L 



Sieboldia, 408. 

 Signate, v. Pupa. 

 Siliquaria, shell, 474. 

 Silk glands = Serictaria, 150. 

 Simiidae, 368. 

 Simplicidentati, 44. 

 Sinistral shell, 108. 

 Sinupallia, 490. 

 Sinupalliate, 126. 

 Siphon, 449, 457 ; 474, 485 ; 



561, 600, 619. 

 Siphonaptera, 511. 

 Siphonochlamyda, 482. 

 Siphonodentalium, 467. 

 Siphonoglyphe, 239. 

 Siphonophora, 770, 775, 777. 

 Siphonops, 408. 

 Siphonozooid, 730. 

 Siredon, paedogenesis, 408. 

 Siren, 408. 

 Sirenia, 367. 

 Skate, v. Raja. 

 Skeleton, Vertebrata, 337. 

 ' Skipping-rope ' fibres, 798. 

 Skull, Aves, 58, 62 ; Rana, 



79, 8 1 ; Teleostei, 91, 96 ; 



Vertebrata, 373. 

 Slug, v. Limax. 

 Snail, v. Helix. 

 Snake, v. Tropidonotus. 

 Solen, foot of, 485. 

 Solenoconcha = Scaphopoda. 



