612 



INDEX 



Entomolithis paradoxus, 111. 

 Entomostraca, 114, 115, 202. 



affinities of trilobites with, 164. 

 environment, external stimuli from, 

 31. 

 restraint of, in some Brachiopoda 

 and Trilobita, 39. 

 Epeira spinea, protective mimetic fea- 

 tures in, 62. 

 Epeiridffi, protective mimetic features 



in, 62. 

 ephebic period in Brachiopoda, 269. 

 stage, 248. 



of trilobites, 121. 

 Erinnys, 140. 

 Eryx, 140. 



glabella in, 141. 

 Eucalathis, 291, 307. 



zugolophus stage in, 281. 

 Eucrustacea, 114. 

 Eucyrtldium elegans, terminal spine in, 



44. 

 Eudesella, 245, 284. 



digitata, lophophore in, 280. 

 viayale, lophophore in, 280. 

 Eudesia, 245, 306. 

 Euglypha mucronata, terminal spine on, 



43. 

 Euloma, 142. 

 Eumetria, 245. 

 Eupkausia, 185, 186, 187. 



beginnings of metastoma in, 192. 

 Euphorbiaceas of Africa and southern 

 Asia, leaves of, transformed into 

 spines, 75. 

 Eurycare, 142, 145. 

 Eurypterus, tail spine in, 84. 

 Eutrilobita, Ilaeckel, 112. 

 evolution among Crustacea, 36. 

 general, 3. 



progressive, Agassiz, 28. 

 Cope, 28. 

 exopodites of Trinucleus, 224. 

 eyes, schizocroal, in Phacopidae, 157. 



Fagonia, spiniform stipules of, 74. 

 Favosites, 424, 427, 433. 



budding in, 426. 



buds in, 432. 



Forbesi, var. occidentalis, young 



colony of, 425. 

 mural pores in, 427. 

 origin and development of, 425. 

 size of corallitcs in, 429, 430. 

 spinigerus, spines on, 45. 

 Favositidaj. symmetrical cell develop- 

 ment in, 429. 

 Faxon, W., evolution of Allorchestes in 

 Lake Titicaca, 36. 

 wonderful specific development of 

 Allorchestes in Lake Titicaca, 65. 

 Fewkes, J. W., development of Spiror- 



bis, 253. 

 Fischer, P., and CEhlert, D.-P., brachial 

 supports in Terebrattlla dorsata and 

 Magellania venosa, from Tierra del 

 Fuego, 406. 



Brachiopoda, 290. 

 centronelliforra stage, 298. 

 development of the loop in Terebra- 



tella dorsata, 293. 

 discoid lophophore in Dyscolia, 278. 

 stages in development of Brachiop- 

 oda, 292. 

 fishes, compound spines of, 68. 

 protective characters of, 55. 

 spines of, 9. 



spiniferous lines and ridges on, 52. 

 spiny forms of, 70. 

 flora, desert, 86. 



of arid regions, Ilenslow, 71. 

 Foraminifera, compound spines in, 

 Brady, 68. 

 pelagic forms of, Brady, 66. 

 spines in, 44. 

 Brady, 49. 

 force, bathmic, Cope, 29. 



deficiency of growth, 31, 39, 41. 

 energy of growth, 31, 34, 38. 

 nerve, 32. 

 thought, 32. 

 forces affecting growth, 31. 

 Ford, S. W., development of trilobites, 

 310. 



metamorphoses of trilobites, 166. 

 young of Olenellus asaphoides, 178. 

 form in Brachiopoda, genesis of, 238. 

 Friele, H., brachial supports in Macan- 

 drevia cranium, Dallina septigera, and 

 Muhlfeldtia sanguinea, 406. 



development of Brachiopoda, 290. 



