5o6 



INDEX. 



Moulds, 413 — 429 



Mouth,' Crayfish, 175, 202 ; Earth- 

 worm, 249; Frog, 9, 44, 48; 

 Hydra, 343, 348; Mussel, 306, 

 3 r 7> 3", 33 8 ; Snail, 274, 281; 

 Tadpole, 161, 163. 



Mucor, 420; Torula of, 424 



Multinucleate cells, 417 



Multipolar nerve-cell, 141 



Muscles, abdominal, Crayfish, 205, 

 207 ; adductor, Mussel, 306, 

 315. 337; anal » 2I 5! of body 

 wall, Earthworm, 265 ; of buc- 

 cal mass, 286 : columellar, 282 ; 

 constrictor laryngis, 50 ; of eye, 

 33,-113; of eyestalk, 233; of 

 hind limb, Frog, 74 — 80 ; of 

 hyoid, 50; limb, Crayfish, 204; 

 mandibular, 205, 207; mylo- 

 hyoid, 37; oblique of trunk, 38 ; 

 pallial, 315; pectoral, 37; pe- 

 dal, Mussel, 315, 339; of seta, 

 Earthworm, 266; of stomach, 

 Crayfish, 178, 213; transver- 

 salis, 38 



Muscle, histology, striped, 133; 

 unstriped, 132; physiology, 156 



Muscular system, Crayfish, 204; 

 Frog, 24 



Mussel, 305 — 341 



Mycelium, 416, 422, 425 



Myelon (see Spinal cord) 



Myophan layer, 364 



N. 



Nares, 2, 9, 48, in 



Nasal, 60 



Nematocysts, 344, 346, 350; his- 

 tology and development of, 354 



Nephridium (see Segmental organ), 

 blood plexus of, 258 



Nephrostome, Earthworm, 244, 

 256. 257 ; Frog, 54 



Nerve, histology of, Crayfish, 229 ; 

 Earthworm, 264; Frog, 136; 

 physiology, 156 



Nerve-cells, Crayfish, 230; Earth- 



worm, 246, 264, Frog, 139; 

 Hydra, 346, 355 



Nerves, 1st Cranial (olfactory) 27, 

 105 ; 2nd Cranial (optic) 27, 

 105 ; 3rd Cranial (oculomotor) 

 27, 105, 114, 116'; 4th Cranial 

 (pathetic), 28, 114, 116; 5th 

 Cranial (trigeminal), 28, 105 ; 

 6th Cranial (abducent) 29, 115, 

 1 16; 7th Cranial (facial), 29, 100, 



' 109; 8th Cranial (auditory), 29, 

 107; 9th Cranial (glossopharyn- 

 geal), 30, 104, 106; 1 oth Cranial 

 (vagus or pneumogastric), 30, 1 06, 

 108 ; antennary, 228 ; anten- 

 nulary, 228; buccal, 276, 298; 

 ganglionic, Earthworm, 263, 

 Crayfish, 227; hypoglossal, 31, 

 103; interganglionic, Earth- 

 worm, 263 ; Crayfish, 227; la- 

 bial, Snail, 299; maxillo-man- 

 dibular, 105 ; ophthalmic, 105 ; 

 optic, Crayfish, 228; Snail, 300; 

 pallial, Mussel, 329 ; Snail, 297 ; 

 palatine, 106; recurrent laryn- 

 geal, no; spinal, 31, 96, 102; 

 splanchnic, 107, no; sympa- 

 thetic, 32, 107; tentacular, 

 299 ; vaso-motor, 108 ; visceral, 

 Crayfish, 229 ; Earthworm, 263 ; 

 Snail, 297, 298 ; viscero-motor, 

 108 



Nervous system, Crayfish, 184, 

 227; Earthworm, 246, 262; 

 Frog, 10, 24, 95 ; Mussel, 312; 

 Snail, 276, 296; sheath of, 

 Earthworm, 263; Snail, 296 



Nettle, 442 



Neural arch, 56; canal, 56, 59; 

 cavity, 10, 41 ; folds and plate, 

 160, 168 



Neurochord, 246, 263 



Neurosensiferous apparatus, Hy- 

 dra, 346 



Nitella, 436, 440 



Nitrogen, 379, 403 



Nodal cell, 432 



Node, Bean, 460, 473 ; Chara, 

 430 ; Fern, 444 



