XIV CONTENTS. 



CHAPTER XIX. CRUSTACEA continued. PAGE 



Caligidae (Chalirnus stage) . ... 239 



Lernaeidae . . ... 240 



Lernaeopodidae . . ... 241 



C. Branchiura . . . ... 244 



7. General considerations regarding the segmentation of the body 



and the metamorphoses of the Malacostraca . .246 



Segmentation of the body . ... 246 



Typical form of the limbs . ... 247 



Metamorphoses of the Malacostraca . . . 247 



The Nauplius stage . . . . 249 



The Metanauplius stage . . ... 249 



The Protozoaea stage . . . . 249 



The Zoaea stage . . ... 249 



The Mysis and Metazoaea stages . ... 250 



Final stages of metamorphosis (Mastigopus, Megalopa) . 251 



Abbreviation of metamorphosis . ... 251 



Metamorphosis of the Schizopoda and Stomatopoda . . 252 



8. Metamorphosis of the Leptostraca . ... 252 



9. Metamorphosis of the Schizopoda . . . . 253 



Nauplius and Metanauplius of the Euphausiidae . . 253 



Calyptopis stages . . ... 255 



Furcilia and Cyrtopia stages . ... 256 



Development of the Mysidae and Lophogastridae . . 257 



10. Metamorphosis of the Decapoda . ... 257 



A. Sergestidae . . . ... 257 



Metanauplius of Lucifer . ... 258 

 Protozoaea and Zoaea of Lucifer . . .259 

 Mysis and Mastigopus larvae of Lucifer . .261 



Metamorphosis of Sergestes . ... 263 



Elaphocaris (Zoaea of Sergestes) . . . 265 



Acanthosoma (Mysis larva of Sergestes) . . 265 



Metamorphosis of other Sergestidae . . . 266 



B. Penaeidae . . . ... 267 



Metamorphosis of Penaeus . . . 267 



Ceratapsis . . . . 271 



Metamorphosis of Stenopus . . . 271 



(7. Caridea . . . , 271 



Abbreviated development of some Caridea . . 274 



Ainphion . . ... 275 



D. Astacidea . . . .... 275 



Homarus . . . . . 276 



Nephrops . . . . . 277 

 Astacus and Cambarus . . . .277 



E. Loricata . . . . . 278 



Embryos of Scyllarus . . . 278 



Structure of the Phyllosoma . . . 281 



Metamorphosis of the Phyllosoma . . . 281 



F. Thalassinidea . . . . 284 



Metamorphosis of Gebia . ... 284 



Larva of Calliaxis (Trachelifer) . . 285 



