INDEX 



201 



Predators (leeches as), 141 

 Predators (of leeches), 144 

 Prepuce, 29 

 Proboscis, 3, 24, 25, 30 

 Proctodaeum, 1 26 

 Prostate glands, 10, 77 

 Prostomium, 4, 7 

 Protonephridium, 129, 130, 133 

 Pseudomonas hirudinis, 40 

 Pterobdella amaray 31 

 Pulsatile vesicles, 29, 30, 53 

 Purines, 44 



Rana esculenta, 97 



Rana temporaria, 97 



Reactions (to light, heat, gravity, 



etc.) see under subheadings 

 Rectal bladder, 10, 21 

 Rectum, 9, 10, 24, 25, 29, 30 

 Reproduction, 101-116 

 Reproductive organs, 9-11, 25, 



30, 107, 109 

 Respiration, 53, 56-62 

 Respiratory movements, 55 

 Respiratory organs, 54 

 Rhynchobdellae, 3, 22, 135 



Salivary glands, 3, 10, 16, 25, 36 

 Searching movement, 86, 95 

 Segment, 1, 7 

 Segmental nerves, 54, 55, 72, 73, 



79 

 Segmental receptors, 8, 79 

 Segmentation (of body), 3 

 Segmentation (of eggs) see cleavage 

 Semiscolecidae, 22, 35 

 Sense bud, 19 

 Sense cells, 79, 80 

 Sense organs, 73, 79-83 

 Sensillae, 3, S, 79, 80 

 Skeleton, 1 

 Solea, 139 

 Somite, 133 

 Sperm, 101, 108 

 Sperm vesicles, 10 

 Spermatophore, 3, 26, 101, 105- 



110 



Staphylococcus aureus, 40 



Starvation, 38 



Swimming, 66, 73, 75, 78, 88, 95 



Tactile organs, 80 



Testis, 3, 10, 24, 25, 29, 30, 34, 



109, 127 

 Tetracotyles, 143 

 Theromyzon 



appearance, 28 



behaviour, 83-55, 90-95, 100 



breeding, 101, 115, 116 



chromosomes, 134 



copulation, 105 



ecology, 137, 138 



embryology, 1 22 



food, 140 



nephridium, 48, 49 

 Thigmotaxis, 87, 94, 95 

 Tooth, 20 



Trachelobdella, 105, 143 

 Trematobdellidae, 22, 35 

 Triturus, 143 

 Trocheta, 34, 136, 140, 141 

 Trypanosoma, 143 

 Tubifex, 120-122 



Urea, 44, 51 

 Uric acid, 44, 45 

 Urine, 46, 49-51 



Vagina, 11, 12, 110 



Vas deferens, 11, 25, 26, 30, 127 



Vasa efferentia, 10, 24, 127 



Vaso-fibrous tissue, 20, 21, 44, 47 



Velum, 8 



Ventilatory movements, 55, 89, 



116 

 Ventral nerve cord, 9, 11, 13, 27, 



56, 69, 71, 75, 78, 109, 119, 



120, 124, 125, 130 



Water balance, 44,51,52 

 Whitmania laevis, 33 



Xanthine, 44 



