INDEX. 



553 



Lumbricus, 56. See Earthworm. 

 Lymnseus, 81 ; lung, 228 



Mactra, 80 



Malacostraca, 69 



Mallophaga; gnathites, 133 



Mammalia, 98 ; teeth, 148 ; tongue, 

 157 ; salivary glands, 159 ; sto- 

 mach, 165 ; intestine, 170 ; caeca, 

 171 ; liver, 173 ; blood-corpuscles, 

 182 ; heart, 198 ; arterial arches, 

 205 ; jugulars, 208 ; lungs, 240, 

 246 ; kidney, 261 ; bladder, 263 ; 

 vertebral column, 316 ; skull, 

 332 ; jaws, 342 ; hairs, 368 ; nails, 

 331 ; flying organs, 383 ; larynx, 

 392 ; brain, 425 ; spinal cord, 

 430; sensory organs, 437, 443, 

 456, 471 ; gonads, 507 ; placenta, 

 514 ; vagina, 517 ; penis, 520 ; 

 teats, 521 



Mandibulata, 76 



Manis, 99 ; vertebrae, 317 



Macrolyristes ; vocal organ, 388 



Marsupials ; respiration, 243 ; 

 bladder, 263 ; lower jaw, 342 



Medusae ; gastro-vascular canals, 

 110 ; nervous system, 395 ; eyes, 

 444 ; ear, 459 ; gonads, 484 



Meuobranchus, 93 ; gills, 236 



Menopoma, 93 ; gill clefts, 236 



Mesostomum, 49 ; digestion in, 107 



Metatheria, 99 



Metazou, 31 



Millepora, 40 ; coral, 283 



Mole ; sternum, 348 



Mollusca, 77 ; odoutophore, 134 ; 

 parasitic, 180; intestine, sali- 

 vary glands, 136; heart, 191 ; 

 respiration, 219 ; lungs, 228 ; 

 renal organ, 254; byssus, 268; 

 skull, 304; foot, 380; nervous 

 system, 410 ; sensory organs, 

 439, 447. 449 ; gouads, 501 



Monera, 27 



Monocrelis ; nephridia, 248 



Monodelphia, 99 



Mouotremata ; retia mirabilia, 

 209 ; bladder, 263 



Musk-deer ; feet, 355 ; brain, 427 j 

 cloaca, 517 



Mussel ; gills, 219 ; organ of 

 Bojanus, 255 ; byssus, 268 



Mya ; figure, 80 



Myodora, 79 



Myriopoda, 74 ; gnathites, 127 ; 

 heart, 189 ; respiration, 216 ; 

 appendages, 377 : gonads, 499 



Myxiue, 88, 181 



M.yxospongiae, 35 ; ova, 483 

 Myzostomum, 102 



Nais, 56 



Nautilus; figure, 83; gills, 221; 



shell, 308; funnel. 381 

 Nematoids, 50 ; digestion, 114, 



178; respiration, 211; gouads, 



488 

 Nemertinea, 84 ; blood-vessels, 



186 ; respiration, 213 ; gonads, 489 

 Neomeuiidae, 81 

 Nepa ; gnathites, 132 

 Nereis, 54 

 Neuroptera, 77 ; gnathites, 131 ; 



stomach, 133 

 Notacanthus, 92 

 Nudibranchs ; respiration, 222 

 Nummulites, 27, 28 ; test, 276 



Oceania. 40 

 Octactiuiae, 43 

 Odontopteryx ; jaw, 146 

 Odoutornithes, 98 ; teeth, 146 

 Oligocheeta, 56 

 Opalina ; digestion in, 104 

 Ophideres; proboscis, 132 

 Ophidia ; vertebrae, 314 ; skull, 



337 ; scales, 355 ; oviducts, 513 

 Ophiocephalus, 92 

 Ophiocoma, 63 

 Ophiothrix, 63 

 Ophiuroidea, 63 ; respiration, 



218 ; skeleton, 295 ; gonads, 491 

 Orchesella, 75 

 Ornithodelphia, 98 

 Oruithorhynchus, 98 ; heart, 198 ; 



pelvic arch, 350 

 Orthoptera, 76; guathites, 129; 



vocal organs, 388 

 Orycteropus, 99 

 Ostracoda, 69 

 Oyster, 79; foot, 380; gonads, 501 



Paludina, 82 ; gill, 228 



Pangonia ; proboscis, 132 



Paramoacium ; figure, 29 



Parrots ; tongue, 157 ; skull, 340 



Patella, 81 ; gill, 221 



Peachia ; mouth of, 112 



Peccary ; stomach, 165 



Pedipalpi, 74 



Pelmatozoa, 63 



Peltogaster, 69 



Pennatula, 70 ; phosphorescence, 

 270 



Pentacrinus ; figure, 60, 63 ; skele- 

 ton, 293 



Peutastomum ; hooks, 180 



