THE PELAGIC STAGES OF YOUNG FISHES. 



We propose in this memoir to continue the papers on the Young Stages 

 of Osseous Fishes commenced by Mr. Agassiz in 1877- We shall take up in 

 succession different points of interest in the development of the bony fishes, 

 devoting the successive numbers of this investigation to limited subjects. 

 The first part of Mr. Agassiz's papers treated of the Development of the 

 Tail.* The second part was devoted to the Development of Flounders,! 

 mainly to the changes of form they undergo while passing from a sym- 

 metrical to an asymmetrical stage. The third part J gave a number of 

 sketches of the changes undergone after hatching by some of the more com- 

 mon of the marine fishes of the southern coast of New England. The fourth 

 part of these investigations, by Agassiz and Whitman, § was devoted to a 

 preliminary notice on the early stages of some of the pelagic fish eggs of 

 Newport Bay. || 



* A. Agassiz. On the Young Stages of some Osseous Fishes. I. Development of the Tail. Proc. 

 Am. Acad., Kin., 1S77, p. 117. 



■\ A. Agassiz. Development of the Flounders. Proc. Am. Acad.. XIV., 1878, p. 1. 

 % A. Agassiz. On the Young Stages of some Osseous Fishes. III. Proc. Am. Acad., XVII., 18S2, 

 p. 271. 



§ A. Agassiz and (' Whitman. On the Development of some Pelagic Fish Eggs. Preliminary 

 Notice. Proc. Am. Acad., XX., 1884, p. 23. 



|| The following papers treating of lish eggs arc referred to in iliis memoir: — 

 Malm, A. W. Svenska Vetensk. Akad. Handl., VII., 1867 and 1868. 

 Sars, G. 0. Indberetninger til Departmentel for det Indre. Christ iania, 1S69. 

 Haeckel, E. Die Gastrula u. die Eifurchung. Jena. Zeits., IX., 1S75. 

 Van Beneden, E. Quart. Journ. Mic. Sci., 1878, p. 41. 

 Kupffer, C. Archie !'. Mikr. Anal . L868, p. 209. 

 Ryder, J. A Bull. U. S Fish. Com., I., p. 136, 1881. 

 Agassiz, A. Proc Am. Acad., XIV . 1878, p. 1 ; XVII., 1882, p. 27. 

 Emery, C. Fierasfer. Arbeit aus d. Zool. Station zu Neapel. 



Kingsley, J. S., and H. W. C inn. Mem. B iston S \ it. Eist., ITT., No. VI., 18S3. 



Hensen, V. Berichl der Com zuv wiss. UStersuch. d. Deiitschen Meere, [V. Kiel, 1883. 

 Brook, Geo. Lin,,. Soc Journal, XVIII., 1884, p. 274; XVIII., 1885, p. 299. 



Quart. Journ. Mic. Sci., 1885. 

 Mcintosh. Nature, XXXI., No. 806, p. 534, and No. mi;, p . 555, 1885. 



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