INDEX 



331 



Trichodectes latits 313 

 Triton cr (status 300 

 Tubifex gen. et 3 sp. 37, 38 



haemoglobin in blood of 10 

 Tubificida family 36 

 Tympanic membrane 264 



Uncinaria duodenalis 318 



trigonocephala 319 

 Unio, genus, definition of 202 



mnrgaritifer 199, 200, 202 



pictorum ' 202 



tumidiiis 203 



Unionidae, definition of family 202 

 Ureter, frog 275 

 Urinary bladder, frog 277 



Vallonia 242 



Valvatidae fam. gen. et sp. 235 



Vas deferens, frog 278, fig. 47 



Vasa efferentia, frog 277 



Vermiculus ge. et 1 sp. 37 



Vertebras 267-269 



Vertigiuidse 243 



Vertigo gen. et 8 sp. 243, 244 



Vesicula seminalis, frog 279 



Vespa austriaca 160, 161 



antenna-comb 77 



crabro 159 



diagram of nest 147 



gennanica 160 



norwegica 161 



rufa 161 



sylvestris 161 



vulgaris 159, 160 

 Vespida 125 



list of British 159-161 

 Vinegar-eels 321 



Vision of insects 88 

 Vitrea gen. et 8 sp. 240 

 Vitrina pellucida 239 

 Vivipara 222 



gen. et 2 sp. 235 

 Volucella bombylans 157 



inanis 156, 157 



zonaria 156 



Wasps 123 et seq. 



cleansing apparatus 77 



food 141, 154 



genital armature 159 



homing power 152-154 



life-history 139-152 



mimics of 125 



movements of detached abdomen 

 85 



muscles for actuating wings 128 



nest 141-148 



parasites 155-159 



population of nest 148 



sex of larvae 149-151 



sting 134-138 



wings of 126 (figure) 

 Wings, cockroach 72-75 



dragonfly 100, 110, 113, fig. 20 



of wasp, movements of 129, 130 

 Worm-castings, weight of 24 



Xiphidium dorsale 97 



' Yellow cells ' of earthworm 11 



Zonitodes 2 sp. 

 Zonitidae 239 

 Zygopterides 113 

 118-122 



240 



(fig. of wings), 



CAMBBIDGE: PRINTED BY j. AND c. F. CLAY, AT THE UNIVERSITY PRESS. 



