CONTENTS. 



I. iDtrodiictioii. 

 11. The life history of Stenopiis hispiiliis. 



Scc-tioii 1. Nutiiral history of .Steuopiis. 

 Section 2. Sogmeiitiilion uiiil the early staf;e». 

 Section 3. Metamorphosis of the larva. 

 Section 4. The adult. 

 Remarks. 

 List of species. 

 Literature of Stonopus. 

 IlL The habits and metamorphosis of Gouodactylus chi- 

 raj^ra. 



Section 1. The structure and habits of the adult. 

 Section 2. Metamorphosis. 



IV. The metamorphosis of Alpheus. 



Section 1. The metamorphosis of Alpbeus minos. 

 Section 2. The metamorphosis of Alpheus hete- 



rochelis iu the Bahama Isl.iuds. 

 Sections. The metamorphosis of Alpheus bete- 



rochelis at Beaufort, North Carolina. 

 Section 4. The metamorphosis of Alpheus hote- 



rochelis at I^ey West, Florida. 

 Section .'>. The larval development of Alpheus 



saulcyi. 



V. Alpheus : A study in the development of the Crus- 



tacea. 

 Introduction. 

 Methods. 

 I'AitT First. 



Section 1. The habits and color variations of 

 Alpheus. 



[With fifty 



I'aut Fir.st — Continued. 



Section 'i. Variations in Alpheus heterochelis. 



Section :i. The abbreviated development of 

 Alpheus and its relation to the environment. 



Section 4. The adult. 



Section 5. Variations from the specific type. 



Section (>. MeasHrements. 



Section 7. The causes and significance of varia- 

 tion in Alpheus saulcyi. 

 Part Second. 



Development of Alpheus. 



Section 1. Structure of the larva of Alpheus 

 saulcyi. 



Section 2. The origin of ovarian eggs in Al|theus, 

 Homarus, and Paliuurus. 



Section '3. Segmentation in Alpheus mines. 



Section 4. The embryology o^ Alpheus. Stages 

 1-13. 



Section .'i. Notes on the segmentation of Crusta- 

 cea. 



Section G. Cell degeneration.' 



Section 7. The origin and history of wandering 

 cells iu Alpheus. 



Section 8. The development of the nervous sys- 

 tem. 



Section 9. The eyes. 



Section 10. Summary. 



Section 11. References. 

 Explanation of figures (accompanying each plate). 



-seven plates.] 



323 



