612 



INDEX. 



Prionus, 588. 

 Procrustes, 590. 

 Proglottisofcestoda,326. 



Proleg, 519. 

 Pronucleus, 109. 

 Prosoponiscus, 451. 

 Prosorochmus, 340, 341. 

 Prostate, 99. 

 Prostomum,311,312,314. 

 Protaster, 292. 

 Proterosaurus, 177. 

 Prothorax, 525. 

 Protodrilus, 365, 375. 

 Protolepas, 446. 

 Protoplasm, 12. 

 Prototracheata, 512. 

 Protozoa, 182. 

 Protula, 372, 382. 

 Proventriculus, 530. 

 Pselaphus, 590. 

 Pseudonavicellas, 208. 

 Pseudophyllidse, 338. 

 Pseudopodia, 54, 186. 

 Pseudopupa, 593. 

 Pseudoscorpionidea, 510. 

 Pseudospora, 194. 

 Pseudotetramera, 588. 

 Pseudova, 544. 

 Pseudovaries of Aphides, 



106. 



Psocus, 559. 

 Psolus, 299. 

 Psorosperms, 208. 

 Psyche, 543, 584. 

 Psychidas, 581. 

 Psychoda, 578. 

 Psylla, 570. 

 Psyllidfe, 570. 

 Psyllodes, 570. 

 Pteraster militaris. 284. 

 Pterodactylicire, 175. 

 Pteromalus, 594. 

 Pteronarcys, 561. 

 I'terophorus, 582. 

 Pteroptus, 495. 

 Pterygotus, 480. 

 Ptinus, 589. 

 Ptychoptera, 578. 

 Pulex, 579. 

 Pupa, 548. 



Pupa coarctata, 551, 574. 

 Pupa libera, 551. 

 Pupa obtecta, 551, 574, 



575. 



Pupa of Cirrpcdia, 443. 

 Pupil, 88. 



Pupipara, 542, 575. 

 Purple, visual, 87. 

 Pygidium, 484. 

 Pygidium of Colcoptera, 



586. 



Pygnogonida, 495. 

 Pygocephalus, 469. 

 Pyralis, 582. 

 Pyrophorus, 589. 

 Pyrrhocoris, 572. 



Quadrilatera, 478. 



Radial vessels, 272. 



Radiata, 266. 



Radii of Echinodermata, 



267. 



Radiolaria, 189. 

 Radius, 528. 

 Rami communicantes, 



82. 



Ranatra, 534, 572. 

 Randwaiizen, 572. 

 Rapacia, 379. 

 Raphidia, 563. 

 Raubfliegen, 576 

 Ray, 134. 

 Reaumur, 133. 

 Receptaculum seminis, 



99. 



Eedi, 133. 

 Redia, 129, 319. 

 Reduvidge, 572. 

 Regeubremse, 577. 

 Renilla, 231. 

 Reptiles, Vascular sys- 

 tem of, 66. 



Respiration, Renewal of 

 .external medium, 72. 

 Respiratory organs, 67. 

 Respiratory trees, 277. 

 Reticular connective 



tissue, 38. 

 Reticularia, 186. 

 Retina, 87. 



Retinacula of Acantho- 

 cephala, 359. 



Retinulae,'S8. 



Rhabditis, 344, 349, 357. 



Rhabdoccela, 311, 313. 



Rhabdonema, 346, 350. 



Rhabdosoma, 455. 



Rhachis, 483. 



Rhipidius, 589. 



Rhipidogorgia, 231. 



Rhipiphorus, 589. 



Rhizocephala, 446. 



Rhizocrinus, 289. 



Rhizoglyphus, 492. 



Rhizopoda, 181. 



Rhizostoma, 261. 



Rhizostomea:, 261. 



RhizostomidEe, 252. 



Rhizotrogus, 590. 



Rhodites, 594. 



Rhopalocera, 582. 584. 



Rhopalonema, 242. 



Rhyacophila, 565. 



Rhynchoccela, 339. 



Rhynchodesmus, 315 

 316. 



Rhynchota, 566. 



Rhyncobdellidas, 399. 



Ribs, 528. 



Rinderbremse, 577. 



Root-lice, 127. 



Rosel von Rosenhof, 133. 



Rosette of Echinoidea. 

 296. 



Rostellum of Cestoda, 

 327. 



Rotalia, 187. 



Rotatoria, 400. 



Rotifer, 404. 



Rotifera, 400. 



Rotula, 297. 



Roux, Breeding experi- 

 ments, 142. 



Riickenschwimmer, 572. 



Rudimentary organs, 

 Meaning of, 156. 



Rugosa, 230. 



Rutimeyer, on origin of 

 ox, 143. 



Sabella, 382. 

 Sabellaria, 382. 

 Sac-bearers, 582. 

 Saccharomyces, 206. 

 Saccocirrus, 381. 

 Sacconereis, 372, 379. 

 Sacculina, 447. 

 Sasnurus, 385. 

 Sagartia, 225. 

 Sagitta, 357. 

 Sagittal plane of Cteno- 



phora, 262. 

 Salivary gland, 58. 

 Salpingceca, 196. 

 Saltatoria, 557. 

 Salticus, 504. 

 Saltigradas, 501. 

 Sapphirina, 436. 

 Sarcode, 19, 22. 

 Sarcolemma, 45. 

 Sarcophaga, 576. 

 Sarcopsylla, 579. 

 Sarcoptidas, 492. 

 Sargus, 577. 

 Sarsia prolifera, 239. 

 Saturnia, 584. 

 Satyrus, 585. 

 Saw-flies, 594. 

 Scalpellum, 445. 

 Scaphognathite of Deca- 



poda, 476. 

 Scatophaga, 576, 



