2 7 8 



INDEX 



Trematodes, hermaphroditism in, 16 



, heterogenesis of, 12 



, infection by, general effects, 46 



, miracidium of, 10 



, ova, measurements of, 35 



, parasitic in man, 17 



, rediae of, 10 



, sexual organs of, 12, 14 



, spermatheca of, 16 



, sporocyst of, 10 



, vitellaria of, 16 



Trichina larvae, effect of cooking on, 137, 



139 



not killed by freezing, 139 



Trichina spiralis common in mammals, 3 



, hosts of, 137 



, mode of infection by, 137 



Trichinclla, 133 



Trichinosis, geographical distribution of, 



139 



Trichocephalus ', 133 



depressiusculusy 133 



trichiurus, 134 



, diseases attributed to, 135 



7richotrachelid(t, 74, 133 



Triodontophorus, 163 



Tropical anaemia, causes of, 1 56 



Tropidcchis, 252 



Tuberculosis, pulmonary, diagnosis from 



infection by Paragonimus, 23 

 Tumours, formation of, 129 

 Turbellaria, 9 



Jyphlopidcz (blindworm snakes), 227 

 , distinctive characters, 250 



Uropcltida, 250 



, geographical distribution, 229 



VENOM, action and nature of, 255, 258 

 , chemical and physical characters of, 

 238 



Venom, classes of toxic components, 239 

 , effects on animals, 239 

 , how rendered inert, 238 

 , immunity to, 244 



of Thanatophidia, 235 



See also Snake-bite. 

 Venom-apparatus of Thanaiophidia, 235 

 Vermes, 6 



Viper a berus, 255 



, distinctive characters, 253 



latastii, 262 



lebetina, 262 



russellti, 258 



- superciliaris , 262 

 Viperida, distinctive characters, 250 

 , geographical distribution, 235 

 , haunts of, 268 

 , points of distinction from Colubridce, 



234 



, synopsis of, 253 

 , venom of, 238, 241 

 Vipcrina (Asiatic), 258 



(African), 261 



, distinctive characters of, 253 



, subfamily of Viperidce, 248 



, synopsis of genera of, 253 



Viscera, fatty degeneration in ankylo- 



stomiasis, 147 

 Vitellaria of trematodes, 16 



Waltefinnesia^ 252 



Water as vehicle of infection, 184-187 



Watsonius (Cladorchis) rvatsoni, 32, 180 



watsoni) 48 

 Worms, 8 



, expulsion of, 152 



Xtnopeltida, 229 



, distinctive characters, 250 



Yokogawa yokogawa, 31 



JOHN BALK, SONS & DANIELSSON, LTD , 83-91, GREAT TITCHFIELD STREET, LONDON, W. 



