5M 



INDEX 



Ependymal 



cells, 211, 219, 304, 381, 382 

 primary, 387 



zone, 304 



primary, 318, 322 

 Ephemeridce, 363 

 Epiglandol, 424, 426 

 Epiphyses of long bones, premature union, 



428 

 Epiphysis, 3, 180 



absence of in Crocodilia, 240 



accessory, 213, 214, 215 



of Agamidce, 273 



of Birds, 294 



of Bos taurus, 317 



of Chelofiia, 250 



of Coccothraustis, 295 



distal segment, 281 



of Gallus domesticus, 296 



of Iguanidce, 275 



lateral buds of, 281 



of Necturus larva, 224 



nerve of, 232, 246 



of Ophidia, 250, 251, 284 



of Passer, 291 



pigmentation of, 68 



proximal segment of, 281 



of Rana, 228, 232 



separation from roof of brain, 272 



structure of, in Anura, 234 



of Testudo geometrica, 252 



of Tropidonotus, 285 



of Zoarces vivipara, 294 



I, or anterior epiphysis, 181, 184 



II, or posterior epiphysis, 181, 184 

 Epithelial 



body, 165 



cords, 308, 312 



vesicles, of pineal organ, 288 

 Epithelium, 



body, 50 



corneal, 49 



cutaneous, 48 



degeneration of, 288 



deric, 474 



ependymal, 287, 288 



pigmented, 48, 49, 50 

 Equilibrating organs, types of, 82 

 Eryops megacephalus, 236 

 Esox Indus, 220 

 Euglena viridis, 66 

 Eunice, single pair of ocelli of, 100 

 Euphausia Midleria, accessory eyes of, 23 

 Eurypterida, 123, 135, 328, 345, 473 

 Eurypterus, 133, 359, 472 

 Euscorpius italicus, 132, 366 

 Evolution, 



divergence of types, 472, 473 



preservation of certain resemblances, 



473 

 Exoskeleton, 

 chitinous, 474 

 dermal bony, 340, 341, 472 

 origin of, 342 

 External limiting membrane, disappear- 

 ance of, 297, 313, 3145 318 



Eye(s), 



absence of, in earthworms, 97, 99, 238 



in fixed animals, 97 



in parasitic worms, 97, 238 



in right member of a pair, 100 



in certain Trilobites, 136 

 accessory, 22, 23, 177 

 aggregated, 21, 137 

 ascidian, 175 

 branchial, 66 

 camera type, 147, 152 

 compound faceted, 14, III, 116 

 compound, non-faceted, 16 

 composite (aggregated), 21, 111, 136, 



137 



cyclops, 29-47 



degeneration of in deep-sea fishes, 238 



burrowing animals, 99, 238 

 development of in Cardium, 358 

 diplostichous, 371 

 ectoparietal, 362, 377 

 effects of disuse, 238 

 entomostracan, 358, 360 

 entoparietal, 362, 377 

 of Euchorda, 168 

 of Eurypterida;, 473 

 faceted, 52, 111, 116, 136, 137 

 false, 77 

 frontal, 26 

 fusion of, 21, 26-47 

 glabellar impressions of trilobites, 142 

 of Hemichorda, 168 

 highly differentiated, 16, 50, 52, 149 

 holochroal, 137, 349 

 inverted, 12 

 lateral, invertebrate, no, 124 



absence of in early larva, 363 



of Euscorpius, 132 



of Limulus, 124, 134 



of Petromyzon, 187 



of Pterygotus, 135 



of spiders, 123, 126 



of vertebrates, 15 

 loss of conjugate movement, 449 

 loss of upward movement, 449, 452, 463 

 marginal, 25, 81, 148, 149 

 median, of Apus, 103, 104 



of Arthropoda, 359 



of blow-fly, 14 



of Carididce, 144 



of Cyclops, 109 



of Cypris, 108 



of Euscorpius, 133 



of invertebrates, 347, 471 



of Lepidurus, 106 



of Limulus, 108, 125 



of Petromyzon, 51 



of Phyllosoma, no 



of Pterygotus, 135 



of spiders, 123, 128 



of Tabanus, 26 



of Trilobites, 136-140 



of vertebrates, 471 



relation to lateral, 352 

 mobility of, 22, in 

 of Nautilus, 162 



