INDEX 



(Italics indicate illustrations) 



As the Appendixes A and B are arranged for easy reference they are not covered by the index 



Abranchus, 140 

 Absorption (of food), 41 

 Acanthobdella, 2, 22, 23, 134 

 Acclimatization, 58-60 

 Acetylcholine, 55, 56, 67, 68, 72 

 Adipose cells, 42, 47 

 Adrenalin, 55, 56 

 Aerial respiration, 62 

 Albumen glands, 12 

 Alimentary canal, 8 

 Allolobophora caliginosa, 45 

 Amoebocytes, 48 

 Anaerobiosis, 61, 62 

 Annular receptors, 8 

 Annuli, 6, 7, 127, 135 

 Anticoagulant, 10, 36, 37 

 Anus, 7, 10, 25 

 Apatemon gracilis, 143 

 Arenicola, 59 

 Arhynchobdellae, 22 

 Atrium, 10, 105, 106, 109, 127 



Batracobdella, 140, 143 

 Behaviour, 79, 82-100 

 Bimastus, 121 

 Blood, 46, 53 

 Blood system, 15, 53 

 Blood vessels, 27, 53, 126 

 Botryoidal tissue, 17, 18, 20, 21, 



44, 47, 49 

 Brain, 1, 76-78, 130 

 Branchellion, 29, 30, 42, 54, 140 

 Breeding, 101-116, 139 

 Brood care, 101,110 



Callobdella lophii, 108,139 



Chaetae, 2 



Chemical substances, reaction to, 



97-100 

 Chemoreceptors, 80, 97, 100 

 Chloragogen tissue, 44, 45 

 Chromatophore, 89-92 

 Chromosome number, 134 

 Circulation, 53-56 

 Classification, 2, 22, {see appendix) 

 Cleavage (of eggs), 116, 117, 119- 



122, 127, 128, 131, 133, 134 

 Clitellum, 2, 5, 7, 110 

 Cocoon, nO-114, 119, 133, 134, 



139 

 Coelom, 1, 53, 77, 126, 111 

 Coelomic corpuscle, 45, 48, 49 

 Coelomic fluid, 1 , 3, 44-46, 53, 54 

 Coelomic sinuses, 3, 15, 27 y 53, 



54, 101, 108 

 Colour change, 89 

 Colour vision, 91 

 Conducting tissue, 108, 109 

 Connective tissue, 18 

 Co-ordination, 75 

 Copulation, 104, 107 

 Copulatory area, 108, 109 

 Corynebacterium, 50 

 Cotylurus cornutus, 143 

 Courtship, 104 

 Creeping, 73, 74 

 Crop, 9, 10, 21, 24, 25, 29, 30, 39, 



125, 133 

 Cuticle, \6-18 

 Cystobranchus, 42, 109, 112, 113, 



140 



197 



