TABLE OF CONTENTS 



Introduction 7 



Acknowledgment? 9 



Materials 10 



Head-capsule 16 



Epicranial suture 17 



Vertex 20 



Occipital suture 21 



Occiput 21 



Compound eyes . . ~~ 



Oculata 22 



Supratentorina 22 



Ocelli 23 



Antennaria 2,? 



Antacoria 23 



.\ntacava . 23 



Pretentorina -^ 



Front 24 



Clypeus 25 



Postcl>-peus 25 



Clypealia 25 



Mandibularia . 26 



Precl>'peus ....,,. 26 



Labrum 26 



Occipital foramen 27 



Submentum 27 



Metatentorina 28 



Cervix 29 



Cervical sderites . 29 



Odontoidea . 30 



Postgena 30 



Gula '. '2 



Epicraniura 34 



Paracoila 34 



Postcoila 34 



Precoila 34 



Tentorium 35 



Pretentorium. .. 36 



Metatcntorium. . . 37 



Corpotentorium . . 37 



Laminatentorium. . 38 



Supratentorium 39 



Some Phylogenetic Considerations 40 



Summarj' 48 



Bibliography 50 



