608 



INDEX 



crinoids, Waldron, 313. 

 Crioceras, 96. 



Cristellaria calcar, spines in, 49. 

 Cromus, 153. 



Crotalocephalus, 153, 155, 156. 

 fourth annulation in, 127. 

 Crotalurus, 148. 



Crucibulum spinosum, spines in, 51. 

 Crustacea, 157, 167, 168, 169, 170, 187, 

 188, 189, 190, 193, 194, 202, 209, 210, 

 215, 219. 



anal segment of, 216, 217. 

 aquatic, suppression of appendages 



in, 83. 



evolution among, 36. 

 intimate relationship of trilobites 



with, 110. 

 modern, 186. 

 nauplius of, 170, 205. 

 Claus, 190. 

 modern higher, 121. 

 principle of cephalization in, Dana, 



83. 



protective spines, in, 55. 

 protonauplius form of, 121. 

 rank of trilobites in, 114. 

 reduction in limbs of, 83. 

 results of hypertrophy in, Packard, 



38. 

 second theoretical head segment in, 



119. 



spineless nauplius of, 19. 

 spine production in, 13. 

 spines in, 10. 



in larval stages of, 19. 

 spiniferous ridges on, 52. 

 spinous prominences on test of, 9. 

 stalked eyes in, 117, 119. 

 structures in higher, 117. 

 Trilobita the earliest forms of, 185. 

 trilobites an appendage to, Lang, 

 114. 



a sub-class of, Kingsley, 114. 

 classed with, 109. 

 crustacean, form of original, 189. 



head, development of, 123. 

 crustaceans, amphipod, found in lakes 

 Baikal and Titicaca, 64. 



Waldron, 313. 

 Crypkceus, 156. 



plain cephalon in, 157. 

 Cryptondla, 245, 291, 305, 307. 



Cryptonymus, 146. 

 Cryptopora, 231, 245. 



protegulum in, 234. 

 Ctenocephalus, 140, 153, 178. 



glabella in, 141, 182. 



(Hartelld) Matihewi, small cephalon 



of, Matthew, 178. 

 Ctenopyge, 142. 

 Cumacea, 200. 

 cuticles in embryonic stages of insects, 



19. 



Cyathaxonia cynodon, spinules in, 50. 

 Cyathophycus reticulatus, 49. 

 Cybele, 153. 



eye-line in, 154. 



pygidium in, 223. 

 Cyclognathus, 142. 

 Cyclops, 189. 



fourth pair of limbs of, 192. 



nauplius of, 164. 

 Cydopyge, 146, 188. 

 Cyphaspis, 113, 141, 148. 



eyes in, 148. 



fixed-cheeks in, 148. 



glabella in, 137. 

 Cyphoniscus, 133. 

 Cypris, 36. 



bivalve shell in, 193. 



nauplius in, 192. 

 Cyrtia, 385. 

 tiyrtina, 245, 385. 

 Cyrtometopus, 155. 



direct line from, Reed, 156. 



pentamerous lobation of glabella in, 



155. 



Cystoidea, smooth surface in early, 25. 

 Cytisus spinosus, spiniform branches of, 

 75. 



Dcemonorops hygrophilus, leaf of, 89. 

 Daikaulia, 242. 



Dall, W. H., characters of Thecidium, 

 256. 



classification of Brachiopoda, 290. 

 earliest stages of development of 



Terebratalia obsoleta, 297. 

 loop in Leiothyrtna cubensis, 396. 

 Terebratella occidentalis, var. obso- 

 leta, 406. 

 Dallina, 288, 297, 299, 301, 303, 306, 308. 



