INDEX — GLOSSARY 



435 



Nautiloidea, 252, 261-262 ; see also 

 Nautilus; geologic range of, 261. 



Nautilus, 89, 206, 251-259, 262, 263, 

 270; N. macromphalus, 253; N. 

 pompilius, 252, 254; .V. umbilicatus, 

 254; body of, 254; creeping, 252-253, 

 253; development of, 258; digestion 

 of, 256-257 ; distribution of, 262 : 

 eggs of, 258; excretion of, 257; eyes 

 of, 332, 233, 257-258; food of, 256; 

 funnel of, 232, 255 ; geologic range of, 

 260; gills of, 255, 256; habitat of, 

 251; hearing of, 258; heart of, 257; 

 hyponome of, 232, 255 ; jaws of, 

 256 ; kidneys of, 257 ; lobes of, 253 ; 

 mantle of, 255; muscles of, 254; 

 nervous system of, 257 ; osphradia of, 

 255, 258; otocysts of, 258; radula of, 

 257; respiration of, 256; saddles of, 

 253 ; sense organs of, 257 ; septa of, 

 251, 232 ; sexes of, 258 ; shell of, 253 ; 

 siphon of, 251-252, 232, 254, 255; 

 smell of, 258; sutures of, 253; ten- 

 tacles of, 255 ; umbilicus of, 254. 



Navicular bone, in the cat, 32^. 



Neanderthal man, 400. 



Neck, see cervical. 



Neck-frilled dinosaur, 364. 



Necturus, 353. 



Nemathelminthes, 140-141 ; fossils of, 

 140, 141 ; geologic range of, 409. 



Nematocysts, 124; ^ee nettle-cells. 



Nematophycus, 36. 



Neolenus serratus, 285. 



Neolimulus, 310, 311, 312. 



Nephridia, in Annulata, 144; in 

 brachiopods, 186; in cephalopods, 

 257; in pelecypods, 213. 



Nereis, 146; N. virens, 142-145, 143; 

 blood of, 144 ; body of, 142 ; digestion 

 of, 144 ; excretion of, 144 ; food of, 

 143; fossils of, 145; muscles of, 143; 

 nervous system of, 145 ; sense organs 

 of, 145 ; sexes of, 145. 



Nerves, in plants, the principal fibro- 

 vascular bundles or ribs in a leaf ; in 

 animals, the whitish fibers which 

 transmit nervous impulses throughout 

 the body ; cranial, m ; in Hydrozoa, 

 no; in plants, 50, 59; spinal, 333- 

 334 ; ventral nerve cord in crusta- 

 ceans, 27Q. 



Nervous system, central, 333 ; connec- 

 tion of, in mammals, 334 ; of A moeha, 

 87 ; of cat, iii ; of mammals, m ; 

 of Protozoa, 87 ; peripheral, 333-334; 

 sympathetic, 334. 



Netted-veined leaves, with ribs or veins 

 branching, the minute branches 

 uniting, thus giving a netlike appear- 

 ance to the leaf, 79. 



Nettle-cells, the poison of some of these 

 cells is believed to be formic acid ; in 

 Coelenterata, 108, no; in corals, 123, 

 124; in Hydrozoa, 1 10; in Sertularia, 

 no. 



Neural arch, 326. 



Neural canal in vertebrae, 326. 



Neural spines in vertebrae, 326, 346, 

 360, 367. 



Neurals, in turtles,- 366. 



Neurocoele, 321. 



Neuroptera, 319. 



Neuropteris, 46, 59; N. hirsuta, 38; 

 N. smithsii, 38. 



Newark beds, 6; fish from, 14; fossils 

 from, 14. 33Q. 



Niagara formation, fossils from, 137, 138, 

 155; geologic age of, 137. 



Niobrara formation, fossils from, 372; 

 geologic age of, 372. 



Nodes, in Calamites stem, 4Q, 50. 



Non-calcarea, 98, 102. 



Notharctidas, 399. 



Notochord, 321 ; in fishes, 346. 



Nucleus, in A mceba, 84, 83 ; in Protozoa, 

 84. 



Nucula, 223, 231 ; N . proxima, 223. 



Nudibranchs, 243 ; absence of shell in, 



243- 

 NuUipores, 37, 38. 

 Nummulites, 88, 91, Q2. 



Oak, 77. 



Ocelli, in Hydrozoa, in; in medusae, 



III. 

 Octocoralla, 135-136. 

 Octopus, 269, 273. 

 Octoseptata, 131. 

 Ocular plate, 167, 169. 

 Ocular tentacles, 232, 233, 258. 

 Odd-toed ungulates, 389-396 ; see peris- 



sodactyls. 

 Odonata, 319. 



