INDEX 



603 



batrachians, horned, position of, in de 

 fence, 54. 



snake-like, external limbs of, 76. 

 Bavarilla, 142. 

 beetle, stag, horns in, 60. 

 beetles, Hercules, horns in some, Bate- 

 son, 59. 



Bellinurus, 222. 

 Berberis vulgaris, disappearance of 

 spines on, 74. 



indirect growth of spines in, 12. 

 Bergeronia, 142. 

 Bernard, H. M., affinities of trilobites, 



110. 



cranidium in trilobites, 181. 

 development of crustacean head, 



123. 



dorsal shield of trilobites, 193. 

 hypostoma in trilobites, 188. 

 phyllopod affinities of Trilobita, 



210. 



Btfida, 245. 

 Bignonia argyroviolacea, leaves in, Ker- 



ner, 89, 90. 

 Billings, E., diagnosis of the genus 



Eichwaldia, 336. 

 Bilobites, 245, 399, 405. 

 acutilobus, 404. 

 bilobus, 315, 400, 404. 



early neanic condition of, 270. 

 var. Verneuilianus, 400, 401. 

 development of, 399. 

 gerontic development of, 270. 

 various, 400, 401. 



developmental changes in, 402. 

 nepionic shell in, 404. 

 obsolescence of bilobed form 



of shell in, 270. 

 ontogeny of, 404. 

 Verneuilianus, 404. 



early neanic condition of, 270. 

 bird, wingless, of New Zealand, vestiges 



of wings in, 85. 

 birds, spur on legs and wings of, 9. 



spurs on, 59. 



blackberry, prickles on, 9. 

 blastosphere, 248. 

 Boeclcia, 142, 145. 

 Bohemilla, 132. 

 Bohemillidae, 132. 

 Bolbocephalus, 146. 

 Bolivina robusta, single spine in, 44. 



Bouchardia, 245, 288, 294, 295, 301, 303, 

 308. 

 hinge-plates and muscular fulcra in, 



305. 



plectolophus stage in, 281. 

 bouchardiform stage, 292. 

 box-fish, spiny, 70. 



protective spines in, 55. 

 brachia, morphology of, 274. 

 brachial structures, classification of, 276. 

 brachidium in Terebratulacea and Spi- 

 riferacea, 274. 



of brachiopods, 274. 

 Brachiopoda, 230, 247, 327. 

 affinities of, 232. 

 alternating cirri in adult lopho- 



phore of, Hancock, 275. 

 application of law of radial sym- 

 metry to, 236. 



beginning of lophophore in, 277. 

 brachidium of, 274. 

 classification of, 305. 



Dall, Deslongchamps, Gray, 



Waagen, 290. 

 of stages of growth and decline 



of, 246. 



comparisons and homologies in, 253. 

 compound spines in, 68. 

 correlations of ontogeny and phy- 



logeny in, 286. 



deltidium in, Deslongchamps, 391. 

 development of, 229. 

 development of some Silurian, 310. 

 spines in shells of, 13, 14. 

 spinose forms of, Hall and 



Clarke, 24, 25. 

 difference in valves in, 234. 

 dorsal foramen in some, King, Hall, 



GEhlert, 264. 

 embryonic stages of, 247. 



Waldron, 313. 

 ephebic period in, 269. 

 evolution of, 30, 31. 

 families of, CEhlert, 243. 

 genesis of form in, 238. 

 genetic sequence in forms of, 24. 

 geological development of, Pack- 

 ard, 98. 

 gerontic period in, Clarke, 269. 



stages in, 398. 

 largest species of, 96. 

 larval stages of, 250. 



