612 



INDEX. 



Priouus, 588. 

 Procrustes, 590. 

 Proglottisofcestoda,326. 

 Proleg, 549. 

 Pronucleus, 109. 

 Prosoponiscus, 451. 

 Prosorochmus, 340, 341. 

 Prostate, 99. 

 Prostomum,311, 312,314. 

 Protaster, 292. 

 Proterosaurus, 177. 

 Prothorax, 525. 

 Protodrilus, 3(55, 375. 

 Protolepas, 446. 

 Protoplasm, 12. 

 Prototracheata, 512. 

 Protozoa, 182. 

 Protula, 372, 382. 

 Proventriculus, 530. 

 Pselaphus, 590. 

 Pseudouavicellse, 208. 

 Pseudophyllidse, 338. 

 Pseudopodia, 54. 186. 

 Pseudopupa, 593. 

 Pseudoscorpionidea, 510. 

 Pseudospora, 194. 

 Pseudotetramera, 588. 

 Pseudova, 514. 

 Pseudovaries of Aphides, 



106. 



Psocus, 559. 

 Psolus, 299. 

 Psorosperms, 208. 

 Psyche, 543, 584. 

 Psychiclae, 581. 

 Psychoda, 578. 

 Psylla, 570. 

 Psyllidre, 570. 

 Psyllodes, 570. 

 Pteraster militaris, 284. 

 Pterodactylidae, 175. 

 Pteromalus, 594. 

 Ptcronarcys, 561. 

 Pterophorus, 5S2. 

 Pteroptus, 495. 

 Pterygotus, 480. 

 Ptinus, 589. 

 Ptychoptera, 578. 

 Pulex, 579. 

 Pupa, 548. 



Pupa coarctata, 551 , 574. 

 Pupa libera, 551. 

 Pupa obtecta, 551. 571, 



575. 



Pupa of Cirrpedia, 443. 

 Pupil, 88. 



Pupipara, 542, 575. 

 Purple, visual, 87. 

 Pygidium, 484. 

 Pygidium of Coleoptera, 



586. 



Pygnogonida, 495. 

 Pygocephalus, 469. 

 Pyralis, 582. 

 Pyrophorus, 589. 

 Pyrrhocoris, 572. 



Quadrilatera, 478. 



Radial vessels, 272. 



Eadiata, 266. 



Radii of Echinodermata, 



267. 



Radiolaria, 189. 

 Radius, 528. 

 Kami communicantes, 



82. 



Ranatra, 534, 572. 

 Randwanzen, 572. 

 Rapacia, 379. 

 Raphidia, 563. 

 Raubfliegen. 576. 

 Ray, 134. 

 Reaumur, 133. 

 Receptaculum seminis, 



99. 



Redi, 133. 

 Redia, 129, 319. 

 ReduvidEe, 572. 

 Regeubremse, 577. 

 Renilla, 231. 

 Reptiles, Vascular sys- 

 tem of, 66. 

 Respiration, Renewal of 



external medium, 72. 

 Respiratory organs, 67. 

 Respiratory trees, 277. 

 Kcticular connective 



tissue, 38. 

 Reticularia, 186. 

 Retina, 87. 

 Retinacula of Acantho- 



cephala. 359. 

 RetimdsB/88. 

 Rhabditis, 344, 349, 357. 

 Rhabdoeoela, 311, 313. 

 Rhabdonema. 346, 350. 

 Bhabdosoma, 455. 

 Rhachis, 483. 

 Rhipidius, 589. 

 Rhipidogorgia, 231. 

 Rhipiphorus, 589. 

 Rhizocephala, 44<>. 

 Rhizocriuus, 289. 

 Rhizoglyphus, 492. 

 Rhizopoda, 181. 

 Rhizostoma, 261. 

 Ehizostomese, 261. 

 Rhizostomidrtj. 252. 

 Rhizotrogus, 590. 

 Rhodites. 594. 

 Rb.opaloe.era. 582. 584. 



Rhopalonema, 242. 



Rhyacophila, 565. 



Uhyuchoccela, 339. 



Rhynchodesmus, 315, 

 316. 



Rhynchota, 566. 



Rhyncobdellidie. 399. 



Ribs, 528. 



Rinderbremse, 577. 



Root-lice, 127. 



Rosel von Roseuhof, 133. 



Rosette of Echinoidea, 

 296. 



Rostellum of Cestoda, 

 327. 



Rotalia, 187. 



Rotatoria, 400. 



Rotifer, 404. 



Rotifera, 400. 



Rotula, 297. 



Roux, Breeding experi- 

 ments, 142. 



Riickenschwimmcr. 572. 



Rudimentary organs, 

 Meaning of, 156. 



Rugosa. 230. 



Riitimeyer, on oijgin 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. 

 Salpingoeca. 196. 

 Saltatoria, 557. 

 Salticus, 504. 

 Saltigradae, 504. 

 Sapphiiina, 436. 

 Sarcode, 19, 22. 

 Sarcolemma, 45. 

 Sarcophaga, 576. 

 Sarcopsylla, 579. 

 Sarcoptidae, 492. 

 Sargus, 577. 

 Sarsia prolifera, 23!). 

 Saturnia, 584. 

 Satyrus, 585. 

 Saw-flies, 594. 

 Scalpellum, 445. 

 Scaphognathite of Deca- 



poda, 476. 

 Scatophaga, 576. 



