624 



INDEX 



horus of, 21. 

 oyster and its allies, observations made 



upon, Jackson, 237. 

 oysters, spiny, 23. 



Packard, A. S., appendages in embryo 

 of Limidus, 209. 

 cause of spines in Scbizurai, 80. 

 geological development of Trilo- 

 bita, Brachiopoda, and Ammo- 

 noidea, 98. 

 mimicry in caterpillar of Schizui-a, 



62. 

 origin of spines, etc., in caterpillars, 



55. 

 protective spines and tubercles in 

 caterpillars of certain moths, 65. 

 results of hypertrophy in Crustacea, 



38. 

 spines on larvae of geometrid 

 moths, 46. 

 Paget, James, results of pressure on an 



organism, 28. 

 Pakemon, embryos of, 192. 

 Pala;ocarida, 114. 

 Palceopyge, 142. 

 palm, climbing, length of stems in, 



Kerner, 88. 

 palms, spiniferous, 72. 

 Paludina Ilarnesi, differentiation in, 

 66. 



Neumayri, 66. 



Slavonian, differentiation of, in 

 Lower Pliocene, Neumayr and 

 Paul, 66. 

 Panderia, 146, 147. 



position of eyes in, 147. 

 Paraholina, 142, 145. 

 Parabolinella, 142, 145. 

 Paradoxides, 113, 142, 143, 144, 154, 

 178. 

 Cambrian, 183. 



free thoracic segments in, 183. 

 glabella in, 180. 

 large eyes in, 183. 

 pygidium in, 143. 



spinosus, spiuiform pleural exten- 

 sions of, 79. 

 young, 142. 



Paradoxina;, 143. 

 paragerontic stage, 248, 270. 

 Paramajcia, 231. 



parasitic organisms, life history of, 40. 

 Parodiceras discoideum, differences in, 

 436. 



(Goniatites) discoideum, 436. 

 Paterina, 233, 267, 286. 

 lahradorica, 233. 

 new genus, 232. 

 stage, 233, 267, 268. 

 the prototype of brachiopods, 286. 

 valves of, 233. 

 Patenda, 243. 



pear, loss of spines of, by cultivation, 

 74. 

 spiniforra branches of neglected, 

 75. 

 termination of .stems of, 10. 

 Peckham, E. G., protective mimetic 



features in Madagascar spider, 61. 

 Pecten, 23. 



development of spines in many 



species of, 14. 

 -like stage of Spondi/his, 20, 21. 

 Pedicle-opening, development of, Clarke, 

 240. 

 -openings, characters of, Deslong- 

 champs, 240. 



of Brachiopoda, 38. 

 types of, 240. 

 Pelec}TDoda, 230, 255. 



larval shell of, 19, 20. 

 phylogeny of, Jackson, 23. 

 prodissocouch of, 19, 20, 23, 122. 

 Jackson, 231. 

 pelecypods, spines on post-umbonal 



slope of, 45. 

 Peltura, 142, 145. 

 Peneus, 187, 188. 

 eyes in, 117. 

 Peniafjonia, 246. 

 Pentamerella, 245. 

 Pentaments, 257. 

 PeregrineUa, 246. 

 Perforata, ancestry for, 425. 

 periconch, smooth, of Mollusca, 18. 

 Phacopidae, 129, 131, 152, 153. 

 defined, 156. 

 schizocro.al eyes in, 157. 

 Phacopini, 152. 

 Phacops, 113, 129, 143, 156, 222. 



