278 



INVERTEBRATE ZOOLOGY 



Protohydra, 90 

 Protomastigina, 56 

 Protomerite, 43 

 Protomonadina, 56 

 Protoneinertini, 126 

 Protonephridia, 74, 105, 148 

 Protopodite, 205 

 Protozoa, 20 

 Protura, 232, 234 

 Provisional setae, 151 

 Psammon^TC vulcanis, 42 

 Pseudocoel, 128 

 Pseudolamellibranchia, 201 

 Pseudophyllidea, 122, 126 

 Pseiidopodia, 34, 38 

 Pseudoscolex, 118 

 Pseudoscorpionida, 229, 234 

 Psolus, 178, 182 

 Pterodina, 143 

 Pteropoda, 192, 195 

 Pterygotus, 234 

 Ptilosarcus, 103 

 Pulmonata, 195, 196, 201 

 Pulsella, 31 

 Pupa, Insecta, 236 



Molhisca, 197, 201 

 Pycnogonida, 205, 230, 234 

 Pycnogonum, 234 

 Pycnopodia, 174, 182 



Quadrula, 201 



Q 



R 



Rachis, 176 



Radial canals, 90 



Radial chambers, 83 



Radial symmetry, 88, 165 



Radial vessels, 166 



Radials, 180 



Radiata, 88 



Radiolaria, 39, 40, 57 



Radius, 243 



Radula, 184, 194 



Rattulus, 143 



Recapitulation theory, 59, 255 



Receptaculum seniinis, 76, 114 



Reciprocal fertilization, 18, 153 



Redia, 115 



Redi, 6 



Regeneration, 84, 106, 173, 218 



Regularia, 182 



Relapsing fever, 38 



Relationships, phylogenetic, 2, 4, 253 



Renilla, 103 



Reproduction, 6 



asexual, 7 



sexual, 7, 8 

 Reproductive system, 75 

 Respiration, 72 

 Respiratory system, 72 

 Respiratory trees, 179 

 Retina, 63, 79, 198 

 Rhabditis, 131, 133, 136 

 Rhabdocoelida, 110, 125 

 Rhabdomes, 79 

 Rhipidoglossa, 196 

 Rhizocrinus, 182 

 Rhizoplast, 31 

 Rhizopoda, 41, 57 

 Rhizostomae, 96, 103 

 Rhopalura, 60 

 Rhyncheta, 58 

 Rhynchobdellida, 155, 157 

 Ring canal, 166 

 Rocky Mountain fever, 55 

 Rossia, 201 

 Rostellum, 122 

 Rostnmi, 229 

 Rotalia, 57 

 Rotifer, 143 

 Rotifera, 138, 143 

 Roundworms, 128 



S 



Sabellaria, 157 

 Sacculina, 216 

 Sagartia, 103 

 Sagitta, 147, 157 

 Sand dollars, 165, 175 

 Sandfleas, 216 

 Saprophytic habit, 24 

 Saprozoic, 34 

 Sarcocystis, 49, 57 

 Sarcodina, 29, 38, 56 



