CONTENTS 



XI 



Chapteb VII 

 The Systematic Anatomy of Invertebrate Eyes 

 The Structural Variability of Invertebrate Eyes 

 I. Protozoa .... 

 II. Parazoa (Porifera : Sponges) 

 III. Invertebrate Metazoa . 



1. Coelenterata 



(a) Cnidaria . 



Hydrozoa ; Scyphozoa ; Anthozoa 



(b) Acnidaria : Ctenophora 



2. Echinodermata ..... 



Holothuroidea, 184 ; Echinoidea, 185 ; Asteroidea, 185 



3. Worms .... 



(a) Unsegmented Worms 



(i) Platyhelminthes 



Turbellaria, 188 ; Trematoda, 189 ; Cestoda, 189 

 (ii) Nemertea 

 (iii) Nematoda 

 (6) Segmented Worms : Annelida 

 (i) Oligochpeta . 

 (ii) Polycheeta 

 (iii) Archiannelida 

 (iv) Hirudinea : Leeches 



4. Chgetognatha : Arrow-worms 

 6. Rotifera . 



6. Polyzoa : Bryozoa 



7. Brachiopoda : Lamp Shells 



8. Mollusca ... 



(a) Placophora 



(b) Solenogastres . 



(c) Seaphopoda 



(d) Gastropoda 



(e) Lamellibranchiata 

 (/) Cephalopoda 



9. Arthropoda 



(a) Onychophora . 

 Crustacea . 

 Myriapoda 

 Arachnida 



Scorpionidea, 211 ; Xiphosura, 212 ; Araneida, 213 

 Pseudoscorpionidea, 214 ; Pedipalpi, 214 ; Phalangida 

 215 ; Solifugae, 216 ; Acarina, 216 ; Pycnogonida, 21' 

 Insecta ....... 



(i) The Stemmata of Larval or Pupal Forms 

 (ii) The Dorsal Ocelli of Adults . 

 (iii) The Compound Eyes of Adults 



(b) 

 (c) 

 (d) 



{e) 



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Chapter VIII 

 The Eyes of Proto-chordates 



1. Hemichordata ....... 



2. Tunicata : Urochordata ...... 



3. Cephalochordata : Lancelots ..... 



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