INDEX 



461 



Prophase, 4 

 Proserosa, 51, 52, 53 

 Prospective potency, 79 

 Prospective significance, 79 

 Protocephalon, 14, 227 

 Protocerebral somite, 42 

 Proto cerebrum, 103 

 Protocorm, 14, 39, 227 

 Protoplasm, 24 

 Proventriculus, 81 

 Provisional dorsal closure, 56, 195 

 Provisional mid-gut, 199 

 Pseudocoele, 214 

 Pseudoplacenta, 45, 283 

 Pseudoplacento-viviparity, 137 

 Pseudoserosa, 132 

 Pseudovitellus, 139 

 Pteronarcys proteus, 201 

 Punctsubstanz, 21, 98 

 Pyrrhocoris apterns L, 271 



R 



Recapitulation theory, 2 

 Recurrent nerve, 102 

 Reproductive organs, 122 

 Reticulum, 3, 8, 9, 24, 33 

 Retina, 108 

 Rhopalosiphum nymphae, 262 



S 



Salivary glands, 81, 94 

 Sciara coprophila, 361 

 Schizocoele, 112, 214 

 Scolopendra cingulata, 382 

 Scolopendra dalmatica, 382 

 Second ventral groove, 224 

 Secondary cleavage, 35 

 Secondary entoderm, 14, 18, 87 

 Segmentation, 39 

 Segmentation cavity, 65 

 Sense organs, 107 



integumental, 107 

 Serosa, 12, 49, 132 

 Sex cells, 5, 10 

 Sialis lutaria L., 285 

 Silverfish, 185 

 Simple eyes, 107, 109 

 Siphanta acuta, 268 

 Siphonaptera, 356 

 Siphunculata, 252 



Somatic layer, 67, 114 

 Somatic mesoderm, 16 

 Somite, 15, 41, 43, 171, 175, 220 



protocerebral, 42 



tritocerebral, 42 

 Spermatocytes, 6 

 Spermatogonia, 5 

 Spermatogonium, 6 

 Spermatozoa, 7 

 Sperm cysts, 126 

 Sperm tubes, 126 

 Spherules, 35, 197, 199, 201 

 Spiracles, cervical, 96 

 Spireme, 4 



Splanchnic mesoderm, 16, 67, 70, 114 

 Springtail, 165 

 Stem mother, 259 

 Stemmata, 109, 110 

 Stick insect, 219 

 Stigmata, 22 



Stomatogastric nerve, 103 

 Stomatogastric system, 102 

 Stomodaeal invagination, 18 

 Stomodaeum, 71, 81 

 Stone fly, 201 

 Stylops, 287 



Subesophageal body, 19, 121 

 Subesophageal ganglia, 22 

 Subserosa, 62, 309 

 Sucking lice, 252 

 Superficial cleavage, 8, 31 

 Superficial germ band, 50 

 Superlingua, 44 

 SuperUngual segment, 41 

 Symbionts, 138, 139, 141, 262 

 Symbiosis, 138 

 Symphyla, 414 

 Symphylids, 414 

 Synapsis, 6 

 Syncephalon, 358 

 Syncerebrum, 103 

 Synkaryon, 30 



Tanyblastic germ band, 38 

 Telolecithal egg, 8 

 Telophase, 4 

 Telopodites, 47 

 Telson, 40 

 Tentorium, 93 

 Terminal filaments, 124 



