694 



INDEX. 



Radula, 355, 373 



Raia, 571, 572 



Raiidae, 572 



Rail, 615 



Rainey's corpuscles, 218 



Rallus, 615 



Rana, 588 



Ranatra, 489 



Rangifer, 642 



Ranvier, nodes of, 96 



Raptores, 616 



Raptorial foot, 614 



Rasorial foot, 6*4 



Rasor clam, 368 



Rathke, 1 8 



Ratitse, 612 



Rats, 639 



Rat-tail larva, 493 



Rattlesnake, 601 



Ray, 10, 20 



Reamur, 13 



Receptaculum seminis, 120, 471 



Rectrices, 604 



Rectum, 461 



Red coral, 256 



Redia, 276 



Reduviidae, 489 



Regulares, 345 



Reindeer, 642 



;Remak, 18 



Remiges, 604 



Remora, 577 



Renilla, 258, 259 



Reproduction, asexual, 140, 143 



Reproduction, sexual, 142 



Reptilia, 588 



Respiratory organs, 107 



.Respiratory organs of vertebrates, 



547 



Reticularia, 196 

 Reticulum, 642 

 Retina, 129, 131 

 Retina of vertebrates, 540 

 Retinaculum, 494. 

 Retinula, 405 

 Retitelarise, 453 

 Rhabdites, 270 

 Rhabditis, 300 



Rhabdoccelida, 269, 271 

 Rhabdom, 129, 405 

 Rhabdonema, 145, 300 

 Rhabdopleura, 514 

 Rhachiglossa, 380 

 Rhachis, 414 

 Rhamphastos, 616 

 Rhea, 613 

 Rhegmatodes, 242 

 Rhinoceros, 641 

 Rhinocerotidse, 641 

 Rhinoderma. 585 

 Rhizocephala, 426 

 Rhizocrinus, 342 

 Rhizopoda, 187 

 Rhizostomeae, 250 

 Rhopalocephalus, 213 

 Rhopalocera, 495 

 Rhopalonema, 234 

 Rhynchobdellidae, 321 

 Rhynchobothrium, 286 

 Rhynchocephalia, 596 

 Rhynchonella, 325, 328 

 Rhynchophora, 485 

 Rhynchota, 489 

 Rhytina, 645 

 Rib, 517, 518 

 Right whale, 646 

 Ring canal, 331 

 Rocky Mountain sheep, 643 

 Rodentia, 638 

 Rods and cones, 129, 540 

 Root barnacles, 426 

 Rorqual, 646 

 R5sel von Rosenhofen, 13 

 Rossia, 395 

 Rostellum, 280 

 Rostrum, 389, 424, 465 

 Rotalia, 188, 198 

 Rotatoria, 293 

 Rotifera, 293 

 Round worms, 298 

 Rove beetles, 484 

 Rudistidse, 368 

 Rugosa, 258 

 Rumen, 641 

 Ruminantia, 641 

 Rupicapra, 642 



