612 



INDEX. 



Prionus, 588. 

 Procrustes, 590. 

 Proglottisofcestoda,326. 



Proleg, 519. 

 Pronucleus, 109. 

 Prosoponiscus, 451. 

 Prosorochmus, 340, 341. 

 Prostate, 99. 

 Prostomum,311, 312,314. 

 Protaster, 21)2. 

 Proterosaurus, 177. 

 Prothorax, 525. 

 Protodrilus, 365, 375. 

 Protolepas, 446. 

 Protoplasm, 12. 

 Prototracheata, 512. 

 Protozoa, 182. 

 Protula, 372, 382. 

 Proventriculus, 530. 

 Pselaphus, 590. 

 PseudonavicelliE, 208. 

 Pseudophyllidte, 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, 5S4. 

 Psychidpe, 581. 

 Psychoda, 578. 

 1'sylla, 570. 

 Psylltdre, 570. 

 Psyllodes, 570. 

 J'teraster railitaris, 284. 

 Pterodactylidsc, 175. 

 Pteromalus, 594. 

 Pterunarcys, 561. 

 I'terophorus, 5Sii. 

 Pteroptus, 495. 

 Pterygotus, 480. 

 Ptinus, 589. 

 Ptychoptera, 578. 

 Pulex, 579. 

 Pupa, 5 is. 



Pupa coarcta 1 a. 55 1 , 574. 

 Pupa lilicra, 551. 

 Pupa obtecta, 551, 574, 



575. 



Pupa of Cirrpedia, 443. 

 Pupil, 88. 



Pupipara, 542, 575. 

 Purple, visual, 87. 

 Pygidium, 484. 

 Pygidium of Colcoptera, 



586. 



Pygnogonida, 495. 

 Pygocephalus, 4U9. 

 1'yralis, 582. 

 1'yrophorus, 589. 

 Pyrrhocoris, 571'. 



Quadrilatera, 4 78. 



Radial vessels, 272. 



Radiata, 2H6. 



lladii of Echinodermata, 



267. 



Radiolaria, 189. 

 Radius, 528. 

 llami commuuicantes, 



82. 



Eanatra, 534, 572. 

 Randwanzen, 572. 

 Rapacia, 379. 

 llaphidia, 563. 

 Raubfliegen, 576 

 Ray, 134. 

 Reaumur, 133. 

 Receptaculum seminis, 



99. 



Redi, 133. 

 Kcdia, 129, 319. 

 Reduvidae, 572. 

 Regeubremse, 577. 

 Renilla, 231. 

 Reptiles, Vascular sys- 

 tem of, 66. 



Respiration, Renewal of 

 external medium, 72. 

 Respiratory organs, 67. 



Respiratory trees, 277. 

 lleticular connective 



tissue, 38. 

 Reticularia, 186. 

 Retina, 87. 



Retinacula of Acantho- 

 cephala, 359. 



Retinulse, 88. 



Rhabditis, 344, 349, 357. 



Rhabdocoela, 311, 313. 



Rhabdonema. 346, 350. 



Rhabdosoma, 455. 



Rhachis, 483. 



Rhipidius, 589. 



Rhipidogorgia, 231. 



Rhipiphorus, 5s;). 



Rhizocephala, 146. 



Rhizncriims, 2s 1 .). 



Rlii/.oglyphus. 11)2. 



Rhi/.npoda, isi. 



Rhixostoma, 261. 



Rhi/nstomefc, 261. 



Rhizostomidae, 252. 



l.'hi/.otrogus, 5'.H). 



Rhodites, 594. 



Rhopaloccra, 582. 584. 



Rhopalonema, 242. 



Rhyaeophila, 565. 



Rhynchocoela, 339. 



Rhynchodesinus, 315 

 316. 



Rhynchota, 566. 



Rhyncobdellidae, 399. 



Ribs, 528. 



Riaderbremse. 577. 



Root-lice, 127.' 



Rosel von Rosenhof, 133. 



Rosette of Echinoidea. 

 296. 



Rostellum of Cestoda, 

 327. 



Rotalia, 187. 



Rotate ria, 400. 



Rotifer, 404. 



Rotifera, 400. 



Rotula, 297. 



Roux, Breeding experi- 

 ments, 142. 



Riickenschwimmcr, 572. 



Rudimentary organs, 

 Meaning of, 156. 



Rugosa, 2: in. 



Rlitimeyer, on origin of 

 ox, 143. 



Sabella. 382. 

 Sabellaria, 382. 

 Sac-bearers, 5S2. 

 Saccharomyces, 206. 

 Saccocirrus, 3S1. 

 Sacconereis, 372, 379. 

 Sacculina, 447. 

 Saenurus, 385. 

 Sagartia, 225. 

 Sagitta, 357. 

 Sagittal plane of Ctcno- 



phora. 2(ii'. 

 Salivary gland, 58. 

 Salpingceca, I'.Ni. 

 Saltatoria, 557. 

 Salticus, 504. 

 Saltigradas, 501. 

 Sapphirina, 4)!6. 

 Sarcode, 19, 22. 

 Sarcolcmma, 45. 

 Sarcophaira. 576. 



Barcopsylla, 579. 

 Sarcoptida>, 492. 

 Sargus, 577. 

 Sarsia prolit'era, 239. 

 Satin-ilia, 5S4. 

 Sal yrus. 5S.5. 

 Saw-flies, 594. 

 Scalpellum, 445. 

 Scaphognathite of Dcca- 



poda, 476. 

 Scatophnga, 570. 



