3 io 



INDEX 



Rat, viruses, 243 



white, 230 

 Ratitae, 178 



Rattler, timber and mouse, 156 

 Rattlesnake, deaths from, 156 



head of, 154 



oil, 170, see Snake. 

 Rattus norvegicus, see Brown rat. 



rattus alexandrinus, see Roof rat 



rattus, see Black rat. 

 Ray, iio-i2 



electric, 112 



sting, in 

 Red ants, in tropics, 103 



control, 103 

 Red bat, 211 

 Red fox skins, 213, 216 

 Red rockfish, 113 



Red squirrels as destroyers of birds, 198 

 Redia, 29 



Reed, Dr. Walter, 9 

 Reindeer and Eskimos, 273 



European, 272 



groups of, 272 



herds, 272 



in Labrador, 274 



numbers in Alaska, 273 

 Reptilia, 108, 135-76 



characteristics, 135 



classification, 135 



Mesozoic, 135 



number of living species, 135 



orders of living, 135-36 



relation to birds, 135 

 Rheas, 180 

 Rhinoceros, 264 



as food, 268 

 Rhizopoda, 123 

 Rhynchocephalia, 126 

 Ricketts, H. T., 157 

 Roaches, methods of control, 102 

 Rock crab, 77 



lobster, see Lobster, spiny. 

 Rockefeller Hookworm Commission, 36 

 Rodentia, 227 



characteristics, 227 



Rodentia, families, 227-28 



as food, 259 



most destructive group, 228 



number of species, 227 



teeth, 227 

 Roof rat, 229 

 Ross, Ronald, 6 

 Rotifers, 26 

 Rough skeleton prepared by carrion 



crows, 189 



Round-horn deer, 270 

 Round worms, 31 

 Rumen, 264 

 Ruminants, 264 



Sable mink skin, 221 



Sacred clam shells, formation of, 61 



Sage, Mrs. Russell, 203 



Salamanders, 126 



Salientia, 124-26 



Salmonidea, 116 



Salmon, breeding habits, 117 



canneries, 113 



derivation of name, 116 



value of industry, 117 

 Salt-water mussel, 57, 58 

 Sand and oysters, 50 

 Sarcoptes scapici, 83 

 Sardine, annual output of France, 116 



in California and Maine, 116 



origin of name, 116 

 Sauropsida, 135 



Scale insects and ladybird beetles, 106 

 Scallop, 56 



collection, 56 



distribution, 56 



perishability, 56 



shells for cultch, 48 



size and value, 56 

 Scalopus aquaticus, 209, see Mole. 

 Scaphopoda, 45, 66, 67 

 Sceloporus spinosus, 151 



undulatus, 151 

 Sciuridae, 228 



