268 



INDEX 



Natrix lacertina, 208 



Natrix vulgaris, 152 



natrix (Tropidonotus), 152 



Neck, 9 



Nematoda, 11 1 



Nerodia, 152 



Nervous system, 73 



neumayeri (Coelopeltis monspessu- 



lana, var.), 210 

 niger (Coluber longissimus, var), 



188 

 nigrescens (Tropidonotus tessellatus, 



var.), 162 

 Nocturnal Snakes, 93 

 Northern Viper, 230 

 Nostrils, 13, 74 



GEsophagus, 79 

 Olfactory organ, 73 

 Ophidia. 1 



Opisth glyph a, 4, 151 

 Organs of a sixth sense, 75 

 Orsini's Viper, 221 

 Oviparous Snakes, 86 

 Oviposition, 85 

 Ovoviviparous Snakes, 85 



Pairing, 84 



Pallas's Pit-Viper, 262 



Parasites, 107 



Peli as berus, 221 



Pelias dorsalis, 234 



Pelvic arch, 52 



persa (Tropidonotus natrix, var.), 



154 

 persicus (Zamenis gemonensis, 



var.), 172 

 picturatus (Tropidonotus natrix, 



var.), 155 

 Pit-Vipers, 75, 262 

 Poison apparatus, 62 

 Poison fangs, 55, 62 

 Poison glands, 62 

 Poisons, 66 

 prester (Vipera), 235 

 Proteroglypha, 4, 151 

 Protozoa, 112 

 pseudaspis (Vipera berus, var.), 



236 



Pupil, 12 

 Pythonina, 4 



quadrilineatus (Coluber), 191 

 quaterradiatus (Coluber), 182 

 quatuorlineatus (Coluber), 182 



Rattle. 20 



Rattlesnakes. 20, 103 



Rattling, 103 



Reflex movements, 106 



Relation to man, 133 



Renard's Viper, 227 



renardi (Vipera). 227 



Replacement teeth, 55 



Reproduction, 82 



Reptation, 93 



Rep tili a, 1 



Rhiptoglossa, 1 



riccioli (Coluber), 202 



Ring-Snake, 152 



romanus (Coluber longissimus, 

 var.), 188 



rubens (Coluber) , 204 



rubvo-maculosus (Tropidonotus tes- 

 sellatus, var.), 162 



Rustling, 102 



Sand-Boa, 147 



Sand-Snakes, 91 



Sand-Viper, 249 



sardus (Zamenis), 172 



sauromates (Coluber), 183 



scalaris (Coluber), 194 



scalaris (Coronella austriaca, var.), 



199 

 Scales, 14 • 



schwoederi (Coluber leopardinus, 



var.), 193 

 scutatus (Tropidonotus natrix, 



var.), 155 

 semimaculata (Contia modesta, 



var.), 207 

 Sense organs, 73 

 seoanei (Vipera berus, var.), 235 

 Serotherapy, 66, 134 

 Serum treatment. 67 

 Shedding of the epidermis, 20 

 Shields, 14 



