CONTENTS xiii 



Zoaea larval stages The ancestral meaning of the Nauplius larva The develop- 

 ment of the parasitic Copepod, Adheres ambloptitis, and the support which it gives 

 to the recapitulation theory of development The Zoaea larva in Euphausidacea, 

 Penaeidea, Caridea, Anomura, and Brachyura Ancestral meaning of the Zoaea 

 larva The Mysis larval stage : its modification in the Loricata into the Phyllo- 

 soma larva : its modifications among the Crangonidae and Thalassinidae The 

 Megalopa larval stage of Brachyura The brephic stages in Anomura The larval 

 history of Stomatopoda The Metanauplius, Erichthoidina and Erichthus larval 

 stages The Alinia larva The larval history of Portunion as a type of the 

 parasitic Isopoda The development of Agelcna, a type of the Arachnida The 

 development of Limulus : its Trilobite larva and the significance thereof The 

 development of the Scorpion and of some other Arachnida The development of 

 Pantopoda The development of Tardigrada The early development of Donacia 

 as a type of the embryonic development of Insecta The early development of 

 Doryphora The embryonic development of Blatta and the supposed origin of its 

 mid-gut epithelium The development of the genital organs in Phyllodromia 

 The formation of the embryonic membranes in the primitive Aptera (Lepisma and 

 Machilis) The metamorphosis of Galerucella ulmi as type of the larval history of 

 Insecta The development of the wings in Doryphora The development of the 

 compound eye in Dytisciis The metamorphosis in various families of Coleoptera, 

 Diptera, and Lepidoptera The complicated metamorphosis of the Muscidae The 

 meaning of metamorphosis as exemplified by observations on Bomlyx The 

 development of Scolopendra as type of the Myriapoda The development of Julus 

 The ancestral history of Arthropoda . .... Page 169 



CHAPTER IX 

 MOLLUSCA 



The development of Patella as a type of the Mollusca The metamorphoses of Acmaea, 

 Fissurella, and Haliotis Experiments on the eggs of Patella The development 

 of Paludina as type for the formation of the internal organs of Gastropoda The 

 development of Polyplacophora Methods of preserving and staining the eggs of 

 Gastropoda Various modes of the development of the velum in Gastropoda 

 The larval kidneys of Gastropoda and their supposed homologies The develop- 

 ment of Solenogastres The development of Dentalium as type of the Scaphopoda 

 Experiments on the eggs of Dentalium The effect of cutting off the polar lobes of 

 the egg The development of Dreissensia as a type of the Pelecypoda The larval 

 development of the oyster The development of Yoldia as a type of the Proto- 

 branchiata The mode of development of heart and pericardium in Cyclas The 

 development of Unionidae The Glochidium larva The segmentation of the egg 

 of Sepia as a type of Cephalopod egg The development of Loligo as type of the 

 Cephalopoda The development of the eye of Cephalopoda General considerations 

 on the ancestral history of the Mollusca .... Page 291 



CHAPTER X 

 PODAXONIA 



The development of Pfiascolosoma as type of the Sipunculoidea The affinities of 

 Podaxonia The development of Sipunculus The development of Phoronis : 

 various views as to its affinities ..... Page 372 



