320 



1NDLX. 



Lereboullet on development of Lymneus, 



294. 

 Mellusca, 



294. 



Lerneans, 274. 

 Life, limits of manifestation of, 95. 



lowest condition of, in the egg, 28, 



31. 



origin of, 3. 

 organic, 8. 

 principle of, 7. 

 Linguatula, 268, 272. 

 Lithocampe, 49, 156. 

 Loligopsis, 206. 

 Longitudinal axis of Sea-anemone, 179. 



Starfishes, 183. 

 repetition of parts in Artic- 



ulata, 215. 



Lowest kinds of animals, 9. 

 Lydella, 274. 



Lymneus, development of, 294. 

 native, young of, 297. 



M. 



Madreporic canal, 185, 191. 



in young Holothurian, 



293. 



Madreporiform hody, 185, 191. 

 Mammalia, 230. 

 Mammary gland, 235. 

 Mantle of Mollusca, 201, 208. 

 Medulla oblongata, 234. 

 Medusa of Coryne, 77. 

 Medusae developed directly from the 



egg, 75. 



Meduso-genitalia, 75. 

 Menobranchus, 263. 

 Method in the operations of the Creator, 



103. 



Metridium, 57, 84, 178, 247. 

 Milne Edwards on self-division of worms, 



81. 



Mimetic forms, 248. 

 Mites, 274. 

 Mollusca, 118, 195. 



development of, 294. 

 and Protozoa, relations of, 243. 

 Monads, 18. 



Monomerous, the type, 195. 

 Monostroma, 155. 

 Monstrosities, 86. 

 Motile decomposing cells, 98. 

 Motory nerves, 234. 

 Mould, blue, 21. 



white, 21. 



Mulberry state of the egg, 285. 

 Miiller on self-division of worms, 81. 

 Multiple self-division, 80. 

 Muscle, decomposition of, 95. 

 Myrianida, 80, 215. 

 Mystacides, development of, 298. 

 Myxine, 125, 253. 

 Myzostoma, 275. 



N. 



" Natural Theology " of Paley, 104. 

 Nautilus, 213. 



position of shell of, 212. 

 Necrophorus, 221. 

 Nervous collar, 125, 225. 



system, correspondence of, in 

 the grand divisions, 125. 



system of Stentor, 64. 

 Note on scientific property, 37, 304. 

 Notochord, 229. 

 Nucleolus, 32. 

 Nucleus, 20. 



Nutrient organ of the Vertebrate embryo, 

 312. 



0. 



Oblique or spiral type, 160. 

 Omne vivuin ex ovo, 85. 

 One-celled animals, 99. 

 Opalina, 174, 245. 

 Order of things, 264. 

 Organic affinity, 7. 



and inorganic bodies, difference 

 between, 48. 



life, 8. 



Ornithorhynclius, 53, 279. 

 Oscillatoria, 25. 

 Ostrea, 200. 

 Ovary, 225. 

 Oviduct, 225. 

 Owen on Amphioxus, 229. 



Archeopteryx, 278. 

 secondary causes, 102. 

 Oyster, 199. 



P. 



" Paley 's Philosophy," 5 

 Paramecium, 163. 



development of, 286. 

 Parasites of Hydra, Agassiz on, 174. 

 Parentage, common, of species, 277. 

 Pectinatella, 1%, 243. 

 Pelagia, 75. 

 Pentatremites, 183. 



Physical agency in the development of 

 animals, 53. 



forces, 3. 



force, relation of the egg to, 

 100, 102. 



laws, 3. 



Physicists, older, laws of, 5. 

 Phytozoa, 156. 



Planaria, artificial division of, 92. 

 Planariaj, 275. 



Planarians, articulate character of, 263. 

 Plane of the axis of Zoophyta, 243. 

 Protozoa, 243. 



Plan of creation, original, 106. 

 Plant-animals, 156. 

 Planula of Aurelia, 242. 

 Pleuronema, 148, 156, 170. 



