INDEX-GLOSSARY. 387 



133; Coccygeal, 184, 213; Cranial, 169, 211, 217; Facial (vii.), 171, 



212; Glossopharyiigeal (ix.), 171,213; Hyoid, see Facial; Hyoman- 



dibular, see Facial; Hypoglossal (xii.), 254; Labial, 133; Lateral, 35; 



Lateral line n., 213; Mandibular, see Trigeminal and Facial; Maxillary, 



see Trigeminal; Oculomotor (iii.), 169, 212; Olfactory (i.), 169, 211; 



Ophthalmic, see Trigeminal and Facial; Optic (ii.), 103, 133, 169, 174, 



211, 221; Palatine, see Facial; Pathetic (iv.), 170, 212; Phrenic, 303; 



Pneumogastric (x.) = Vagus, q.v.; Post-spiracular = Hyoid, q.v.; 



Sciatic, 213; Spinal, 171, 213, 217; Spinal accessory (XL), 254; 



Splanchnic, 303; Tentacular, 133; Trigeminal (v.), 171, 212, 253; 



Trochlear (iv.) = Pathetic, q.v.; Unpaired n. (impar), 254; Vagus (x., 



Pneumogastric), 171, 213, 254; Visceral, 101, 103. 

 Nerve-cell, 35, 145, 172, 205. 

 Nerve-cord, 145; ventral n.-c., 66, 81. 

 Nerve-corpuscle, 101. 

 Nerve-fibre, 35, 92, 101, 145, 209, 215. 

 Nerve-ring, 35, 65, 81, 119. 

 Nervous system Development of, 150, 320; Distoma, 34; Tsenia, 43; 



Ascaris, 52; Lumbricus, 65; Hirudo, 81; Astacus, 100; Anodonta, 



Unio, 119; Helix, 132; Amphioxus, 145; Scyllium, 169; Rana, 209 ; 



Columba, 252 ; Lepus, 300 ; Homo, 333 ; Comparison of, 319. 

 Neural arch, 158. 

 Neural fold, 151, 224. 

 Neural groove, 151, 224. 

 Neural plate, 151, 224. 

 Neuroglia (veupov, a nerve; y\/a, glue) The delicate connective- tissue 



framework of the nervous system, 66, 216. 

 New Zealand, 347, 349. 

 Nile, 349. 



Nodes Of Ranvier, 215 ; of Schmidt, 215. 

 Non-chordata, 135. 

 Norway Lobster (Nephrops), 109. 

 Nostrils (see Narea, external). 

 Notochord (VUTOV, the back ; xP^'/, a string), in the Chordata A cellular 



rod which prefigures the vertebral column, 3, 135, 138, 150, 156, 158, 



189, 226, 259, 263, 312. 

 Nucleolus (dim. of nucleus, a nut, a kernel) A dense particle within a 



nucleus, 8. 

 Nucleus (nucleus, a nut, a kernel) A more highly differentiated part of the 



protoplasm occurring in most cells, 8 ; Segmentation n. The nucleus 



of the oosperm, 26, 74. 

 Nutrition Amoeba, 9; Vorticella, 14; Hydra, 23; Distoma, 31; Astacus, 



