604 



INDEX 



life histories of, 95. 



list of Waldrou, 314. 



lophopliore iu recent, 274. 



mesembryo of, 248. 



metembryo of, 248. 



modifications from acceleration in, 



233. 

 neanic period in, 268. 

 neoembryo of, 249. 

 nepionic period in development of, 



267. 

 observations on, Lacaze-Duthiers, 



259. 

 pedicle-openings of, 38. 

 phylembryo iu, 254. 

 post-embryonic stages of, 265. 

 protcgulum in, 230. 

 protembryo of, 248. 

 restraint of environment in, 39. 

 revision of families of loop-bearing, 



290. 

 smooth early larval shell in, 18. 

 protegulum of, 18. 

 surface in early, 25. 

 spine development in, 14. 

 spines of, 10. 



Davidson, 51. 

 spiniform structures in, 77, 78. 

 spinose genera of, 70. 

 spinules in. Hall and Clarke, 51. 

 stages in development of, 292. 

 typembryo of, 250. 

 value of stages of growth and de- 

 cline in, Hyatt, Jackson, 229. 

 bracbiopods, initial shell in, 255. 

 mantle of, 255. 

 mouth in, 255. 

 protcgulum in, 122. 

 Wahiron, 313. 

 Brack ijaspis, 146. 

 Brachymetojius, 148. 



Brady, H. B., compound spines in Fora- 

 minifera, 68. 



pelagic forms of Foraminifera, 66. 

 spines in Foraminifera, 44, 49. 

 terminal spiniform processes in In- 

 fusoria, 45. 

 brambles, general spininess of, 88, 

 89. 

 suppression of structures in, 87. 

 Branchipus, first pair of appendages of, 

 191. 



Branco, W., development of fossil 

 cephalopods, 310. 



study of Tornoceras retrorsum, var. 

 ti/j)um, 435. 

 Brouguiart, A., classification of trilo- 



bites, 110, 111. 

 Brongniartia, 154. 



glabella and pygidium in, 155. 

 Bronteidffi, 129, 131, 139. 



defined, 148. 

 Bronteopsis, 146. 

 Bronteus, 113, 129, 149. 



angusticeps, glabella in, 149. 

 campanifer, glabella in, 149. 

 palifer, glabella iu, 149. 

 Brontotheriida;, extinction of, 96. 

 Brooks, W. K., arm development in 

 Glottidia, 274. 

 development of Lingula, 256. 

 growth of spiral arms in Glottidia, 



282. 

 incipient stage of Glottidia, 386. 

 later larval stages of Glottidia, 246. 

 tentacles in Glottidia, 274. 

 tentacular multiplication in Glot- 

 tidia, 407. 

 Bryozoa, spinules of, Hall, 45. 



Waldron, 313. 

 Buch, L. von, study of Tornoceras re- 

 trorsum, 435. 

 Bulimina aculeata, spines in, 49. 

 Bumastus, 146. 



eyes in, 147. 

 Bunodes, free-cheeks in, 118. 

 Burmeister, H., classification of trilo- 



bites. 111, 112. 

 Burmcisteria, 1 54. 



glabella and pygidium in, 155. 

 byssal plug of Anomia, 38. 



Cactacese of America, leaves of, trans- 

 formed into spines, 75. 



cactus, spines in, 74. 



Callaway, C, metamorphoses of trilo- 

 bites, 166. 



young specimen of Ptychoparia 

 monile, 178. 



Callichthijs, male, spines in, Seeley, 

 59. 



Callinectes hastatus, spines on, 47. 



