434 



INDEX — GLOSSARY 



old world, 399 ; spider, 399 ; squirrel, 

 399- 



Monocotyledones, 78-79 ; see mono- 

 cotyledons. 



Monocotyledons, 78-79 ; early flora of, 

 77 ; fossil, 78, 79 ; geologic range of, 

 408 ; less primitive than dicotyledons, 

 80. 



Monograptus, 120; M. clintonensis , 120. 



Monotremata, 378 ; egg-laying, 374 ; 

 geologic range of, 378; relation to the 

 anomodonts, 356. 



Monotremes, the Monotremata. 



Monotypic, containing but one repre- 

 sentative. 



Monticules, 179. 



Monticulipora, 178-179; M. arborea, 

 178 ; corallites of, 178 ; diaphragms of, 

 178, 179; tabulae of, 178. 



Moose, arrival in North America, 375 ; 

 stag, 383. 



Mosasaurs, pythonomorphs somewhat 

 like Mosasaurus, 337, 367. 



Mosasaurus, 367. 



Moss, hair-cap, 42, 43. 



Mosses, 44 ; fossil, 44 ; geologic range of, 

 408. 



Moths, 78, 319. 



Mountain goat, arrival in North America, 

 375- 



Movement, of A moeba, 85 ; of Protozoa, 

 8S. 



Mucus-secreting glands of Amphibia, 

 349- 



Mud-fish, 343, 347. 



Mud-flows, fossil, 21. 



Muensteroceras, 264; M. oweni, 263. 



Multituberculata, 378. 



Mural pores, 133, 137. 



Murex, 243. 



Mus, 382. 



Musci, 44 ; see mosses. 



Muscles, adductor, of Estheria, 302 ; 

 adductor, of pelecypods, 20Q, 210, 211, 

 214; adductor of phyllopods, 302; 

 annular, 232, 254; annulus, 254; 

 aponeurotic bands, 254; circular, of 

 eye, 334; columellar, 238; derivation 

 in the cat, 329; derivation in mam- 

 mals, 329; determination of size 

 in fossils, 329; diaphragm, 330, 331; 

 dorsal, in crustaceans, 278; extensor. 



in crustaceans, 278, 27Q ; fibers of, 

 329; flexor, in crustaceans, 278, 27 g; 

 foot, of pelecypods, 20Q, 211, 214; in 

 Hydrozoa, no; involuntary, 329, 331 ; 

 mantle, in pelecypods, 20Q, 213; of 

 cat, compared to those of man, 329; 

 protractor, 214; radial, of eye, 334; 

 retractor, anterior, 20Q, 210, 211, 214; 

 retractor, posterior, 20Q, 211, 214; 

 siphonal, in pelecypods, 209, 214; 

 ventral, in crustaceans, 278; volun- 

 tary, 329, 331. 



Mushrooms, 40. 



Musk-ox, arrival in North America, 375. 



Muskrat, habitat of, 374. 



Mussels, 151 ; river, 228. 



Mustelus, 339. 



Mycelium, 40, 41. 



Myomeres, 329. 



Myriopoda, 275, 309; 5ee myriopods. 



Myriopods, 275, 309; evolution of , 274; 

 famous locahties for fossil, 318; 

 geologic range of, 309, 409. 



Myrmecophagidae, 382. 



Mysidacea, 306, 307. 



My sis, 285. 



Mytilus ediilis, 25. 



Myxomycetae, 33 ; geologic range of, 408. 



Myxospongida, 97, 98, 107. 



Naming of organisms, 24. 



Naples formation, fossils from, 264 ; geo- 

 logic age of, 264. 



Narwhals, 399. 



Nasal bone, in reptiles, 367. 



Nassa, smell in, 242. 



Natica, 240; N . heros, smell in, 242. 



Nauplius, the larval form in which many 

 crustaceans hatch from the egg; its 

 body is small, oval, unsegmented, with 

 three pairs of limbs corresponding to 

 antennules, antennae, and mandibles 

 of the adult, but now all are used for 

 swimming. A more or less definite 

 carapace is present. Eye is simple 

 and median. Nauplius larvae, similar 

 in all essentials, are present in the 

 Phyllopoda, Copepoda, Cirripedia, 

 and some Malacostraca. 



NaupHus stage, 283, 285, 294, 305, 306; 

 absence of in merostomes and scor- 

 pions, 311. 



