XIV CONTENTS. 



Page 



Principles governing the Formation of Animals 203 



Methods of examining the progress of the Chick in the Egg 206 



Of the Membranes of the Chick 207 



Of their use 210 



Of the Formation of the parts of the Chick 211 



Of the Blood's Motion in the Chick 212 



Of the peculiar Arteries in the Chick 213 



Of the peculiar Veins in the Chick 213 



Of the Brain and Spinal Marrow 214 



Of the Formation of the Intestine 214 



Of the Vivification of the Embryo 216 



Generation of Fish and Shell-fish. 



Generation of the Eel 216 



Generation of the Lamprey 218 



Generation of the Limnea stagnates 221 



Generation of the Paludina vivipara 221 



Generation of the Anodon cygneus 221 



Generation of the Ostrea edulis 222 



Generation of Insects. 



Of the Parts of Generation 223 



Male parts of a large Moth 223 



Male parts of the Rose-beetle \Cetonia aurata] 223 



Of the Laying of the Eggs of Moths 224 



Longevity of Insects according to period of Oviposition 224 



Two-fold Birth of Flying Insects 226 



Notes and Queries on Insect-metamorphosis 227 



Notes and Queries on Generation. 



Relation of Generative Parts to Grade of Species 227 



Influence of the Male on Gestation, in sexes of different species 228 



Relation of size of offspring to number produced and mode of develop- 

 ment 229 



Different proportions of parts in Young and Old Animals 230 



Of the Breast 230 



Relation of Nipples to the Number of Offspring 233 



Query, On the Suckling of the Whale-tribe 234 



Effects of Castration and Spaying 234 



Case of Testes not influencing the Constitution . , 237 



Enlargement of the Breasts in the Male 238 



On Monsters. 

 Introduction 239 



the chick, and is preserved with them in the Royal College of Surgeons : it is printed 

 with my notes in the Physiological Catalogue, vol. v.] 



