CONTENTS. 



Chapter XIX. CRUSTACEA— continued. 

 G. Anomura 



Zoaea and Metazoaea of the Anomura 

 Larva of Porcellana (Lonchophorus) 

 Larvae of the Hippidae 

 H. Brachyura . 



Zoaea of the Brachyura 



Metazoaea 



Megalopa 



Abbreviated development of some Brachyura 



11. Metamorphosis of the Stomatopoda 



Erich thoidina stage 



Erich thus stage . 



Alima stage 



Connection of the larval forms with definite genera 



12. Metamorphosis of the Cumacea 



13. Metamorphosis of the Anisopoda 



14. Metamorphosis of the Isopoda 



Larvae of the Anceidae 

 Larvae of the Bopyridae . 

 Larvae of the Entoniscidae 



15. Metamorphosis of the Amphipoda 



16. General considerations regarding the development of the 



Crustacea 

 Phylogenetic significance of the Zoaea 

 Phylogenetic significance of the Nauplius 

 Hypothetical derivation of the Crustacea from the Annelida 

 Relations of the Protostraca to the Palaeostraca, Pantopoda, 



and Peripatus . 

 Characteristics of the primitive Phyllopoda 

 Relationships of the Entomostraca . 

 Relationships of the Malacostraca 

 Significance of Nebalia 

 Literature of the metamorphoses of the Crustacea 



Chapter XX. PALAEOSTRACA. By K. Heider 

 General considerations regarding the Palaeostraca 

 I. Metamorphosis of the Trilobita 

 II. Development of the Xiphosura 



1. Oviposition, cleavage, and formation of the germ-layers in 



Limulus 



2. Development of the external form of the body 



Trilobite stage of Limulus 



3. Formation of the organs 



A. Nervous system and sensory organs 



B. Alimentary canal 



C. Formation of the mesoderm 

 D. Respiratory organs . , 



4. General considerations regarding the Palaeostraca 



Relations of the Palaeostraca to the Arachnida 

 Literature of the Palaeostraca 



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