INDEX 



199 



Haemadipsidae, 22, 32, 111, 113, 



136 

 Haem enter ia {see also Placobdella), 



29, 110, 140 

 Haemoglobin, 54, 59, 60 

 Haemogregarina, 1 43 

 Haemopis 



anaerobiosis, 60 



behaviour, 85, 89 



breeding, 110 



chromosomes, 1 34 



co-ordination, 75 



feeding, 41, 136, 140 



habits, 32 



muscle, 67, 68 



nerve, 70-72 



parasites, 141 



salt uptake, 51 



water relations, 52 

 Heat, reaction to, 92 

 Helobdella 



anaerobiosis, 60 



appearance, 28 



behaviour, 83-55, 88, 91, 93- 

 96, 100 



breeding, 101 



ecology, U6-138, 140, 144, 145 



oxygen consumption, 57, 58 

 Hemibdella soleae, 139 

 Hemiclepsis 



appearance, 28 



behaviour, 83-88, 90, 93-98, 

 100 



breeding, 110 



chromosomes, 1 34 



ecology, 137-140 



food, 27 



locomotion, 94 



parasites, 143 

 Hirudidae, 22, 32, 48, 104, 110, 



111, 113 

 Hirudin, 36, 137 

 Hiriidinaria, 32, 50, 64, 104, 140 

 Hirudo 



anaerobiosis, 60, 62 



behaviour, 83-55, 89, 92-98, 

 100 



blood system, 15 



breeding, 110 



circulation, 5J-56 



cocoon, 113 



colour vision, 91 



digestion, 38-41 



embryology, 130 



excretion, 46, 47 



excretory system, 12, 49, 50 



external characters, 5, 6 



eye, 19, 81, 82 



feeding, 36, 37, 139, 140 



gut, 8,9 



habits, 32 



histology, 16, i 7 



locomotion, 73, 75 



metabolism, 43 



muscle, 68 



nervous system, 13, 14, 69-71 



reproductive system, 9, 10, 11 



sense organs, 80, 81 



water relations, 52 

 Hirudoin, 113 

 Hirudonine, 48 

 Histamine, 37 

 Hosts (of leeches), 139 

 Hosts (leeches as), 141 

 Hymenolepis parvida, 143, 144 

 Hypoxanthine, 44 



Ichthyobdellidae, 22 



Intestine, P, 10, 21, 24, 25, JO, 39, 



133 

 Iron metabolism, 47 



Jaw, 8, 9, 20, 21 



l^arva, 129, 133 

 Life history 



Erpobdella octoculata, 102, 146 

 Erpobdella testacea, 103 

 Glossiphonia complanata, 102, 



146 

 Helobdella stagnalis, 103, 104, 

 146 



