INDEX 



621 



convexa, 431. 



corallites in, 433. 

 intermural cell multiplication 

 in, 430. 

 favosa, spines on, 39. 



spiniform processes on epitheca 

 of, 76, 77. 

 lenticular is, 421, 422. 

 mural pores in, 427. 

 size of corallites in, 429. 

 Micmacca, 142. 

 Microdiscus, 130, 136. 



absence of eyes in, 183. 

 cephalon of, 128. 

 eye-spots lost in, 135. 

 free segments in, 136. 

 protaspis stage of, Matthew, 136. 

 pygidium in, 135. 



speciosus, glabella and pygidium in, 

 136. 

 Milne-Edwards, A., classification of tri- 



lobites. 111, 114. 

 Mimulus, 245, 387. 



waldronensis, 315. 



discussion of, 334. 

 Minot, C. S., growth in guinea pigs, 92. 

 Moina, absence of median eye in, 193. 



nauplius appendages of, 192. 

 Mojsisovics, E., development of fossil 



cephalopods, 310. 

 MoUusca, 247. 



attenuation of form in, 91. 

 compound spines in, 68. 

 development of spines in shells of, 



13. 

 free variation among, 65. 

 initial shell in, 255. 

 ontogeny of spiniferous species of, 



19. 

 smooth early larval shells of, 18. 

 protoconch, periconch, and pro- 

 dissoconch of, 18. 

 spine development in, 14. 

 spines of, 10. 



Jackson, 51. 

 spiniform projections on shells of, 9. 

 spiny forms of, 70. 

 moUusks, mantle of, 255. 



mouth of, 255. 

 Monograptus spinigerus, apcrtural spines 



on, 45. 

 Monomer ella, 243. 



Manor achos, 156. 



accessory lobes in glabella of, 157. 

 moose, antlers as sounding-boards in, 54. 

 morphogenesis, application of law of, 17. 



law of, Hyatt, 229. 

 Morris, C, defence in animals and 



plants, 52, 97. 

 Morse, E. S., arm development in Tere- 

 bratulina, 274. 



comparisons and homologies in 



Brachiopoda, 253, 

 crura in nepionic stages of Terebrat- 



ulina septentrionnlis, 268. 

 development of TerebratuUna, 238. 

 early embryology of brachiopods, 

 246. 



stages of TerebratuUna, 231. 

 growth of loop in TerebratuUna, 291. 

 incipient stage of TerebratuUna, 386. 

 loop in TerebratuUna septentrionaUs, 



396. 

 tentacular multiplication in Tere- 

 bratuUna, 407. 

 moth, early thorn, mimetic features in, 



Poulton, 62. 

 motion primarily rhythmic, Spencer, 67, 

 Miihlfeldtia, 231, 238, 246, 288,303,306, 

 307, 308, 409. 



adult loop in, 291. 

 attachment of loop in, 292. 

 ismeniform stage of, 300. 

 pedicle in, 235. 

 sanguinea, 298, 300. 



adult structure of, 301. 

 brachial supports in, Friele, 

 Deslongchamps, 406, 

 truncata, 298, 299, 300. 

 variations in, 77. 

 var. monstruosa, production of 

 disciuoid characters in, 238. 

 miihlfeldtiform stage, 298. 

 Miiller, F., description of Discinisca, 

 256. 



growth of spiral arms in Dis- 

 cinisca, 282. 

 larval form of Discinisca, 246. 

 O. F., the name NaupUus, 188. 

 Murex, 70. 



compound spines in many species 



of. 68. 

 spineless nepionic stages of spiny, 

 18. 



