298 



INDEX 



Crinoidea, 22, 25 

 Crinoid deposits, 24 

 Crocodile, 136 



African, 176 



salt water, 176 

 Crocodilia, 170 



characteristics of, 136 



dangerous to man, 176 

 Crocodilus niloticus, 176 



porosus, 176 



Crotalus adamanteus, 161, 162 

 Crow, American, 195 



fish, 195 



Crows and jays as bird destroyers, 190 

 Crustacea, 68, 71 



characteristics of, 68, 69 



molting of, 72 



Cryptobranchus allegheniensis, 125, 126 

 Ctenophora, 16 

 Culex, 6, 83, 86, 87, 89 

 Cultch for oysters, 47 

 Cuttle-bone, 67 

 Cuttlefish, 45 

 Cyanocitta cristata, 195 

 Cyclophis aestivus, 167 

 Cyclops, 68 



as host of guinea- worm, 38 

 Cyclostomata, characteristics of, 108-10 

 Cyclura carinata, 152 

 Cyprus, sponges of, 12 

 Cysticerci, 27, 28 



D 



Darwin, Chas., 41 

 Dasypodidae, see Armadillo. 

 Dasypus novemcinctus texanus, 262 



sexcinctus, 26 

 Day mosquito, 84 

 Deer, 264, 268-74 



former importance of, 268 



hides and horns, 269 



raising on waste lands, 269 

 profits of, 269 



reason for domestication, 269 



Virginia, 272 



age at maturity, 272 



Deer, Viriginia, domestication of, 272 

 food of, 272 



gestation period of, 272 

 Delphinus delphis, 276 

 Demodex folliculorum, 83 

 Dengue fever, 10 



Dentalium, see Elephant's tusk shell. 

 Devil-fish, 65 

 Dew itch, 35 

 Diadem spider, 80 

 Diamond-back terrapin, 139-44 



breeding habits of, 143 



bulls, cows and heifers of, 140 



carapace of, 140 



counts, halves and quarters, 141 



crawls, 141, 142 



demand for, 141 



farm, 140-44 



as food, 139-44 



food of, 141 



hibernation of, 139 



incubation period, 143 



incubator for, 143 



intelligence, 144 



propagation of, 140-44 



size and value, 139, 143 



stew, cost of, 141 



substitutes for, 141 

 Diatomes, 10 

 Dick, J. F., 157 

 Didelphis virginiana, 207 

 Digger ground squirrel, see Ground 



squirrel. 



Diphtheria and flies, 92 

 Dipnoans, 113 

 Dirt-eating habit, 34 

 Distoma, 29 

 Distomiasis, 29 

 Ditmars, R. L., 154 

 Dog as rat-killer, 243-44 



family, 212 

 Dolphins, 274, 276-77 

 Domestic animals as rat destroyers, . 243 

 Dracunculus, see Guinea-worm, 38 

 Dragon-flies as mosquito destroyers, 88, 

 106 



