VI. Some Observations on tiie Embryology of tiie Teleosts. 



By J. S. KiNGSLEY AND H. W. CONN. 

 Read March 15, 1S82. 1 



THE following observations on the development of a marine bony fish were made 

 at the Summer Laboratory of the Boston Society of Natural History at Annisquam, Mass., 

 during the months of June, July and August 1881. Most of the facts here recorded have 

 been witnessed by both authors and iu the majority of cases have been repeated many 

 times. The composition of this article is the work of Mr. Kingsley and when the pronoun 

 " we " occurs in the following pages it indicates the fact that both of us are responsible 

 for the statements presented, the phenomena which were witnessed by Mr. Conn alone are 

 indicated by the use of his name, while the " I" which will be frequently met in the course 

 of the article indicates that Mr. Kingsley alone is responsible for the statement or interpre- 

 tation presented. As we separated soon after the conclusion of the observations herein 

 recorded, it has fallen to the lot of Mr. Kingsley to make the comparisons with the work 

 of other authors ; and the whole discussion of previous results, with the exception of a 

 portion of the work of Oellacher, has been done by him. The bibliography which follows 

 has been wholly the compilation of Mr. Kingsley and embraces only those papers which 

 have been consulted during the preparation of this article. Nevertheless it is hoped that 

 it may prove of use to other students of Vertebrate Embryology. I have adopted the 

 method of referring to these various papers which is used by Dr. Mark in his valuable 

 memoir on the Maturation, Impregnation and Segmentation of Limax ; viz : the name of 

 the author followed by the date of the article in full faced type. Where two or more 

 articles by the same author were published in the same year they have the additional 

 letters ", ", c , etc. 



BIBLIOGRAPHY. 



Agassiz, Alexander E. R. ■ 

 76 . The development of Flounders < American Naturalist, x, pp. 705-708 (1876). 

 '77 a . On the young stages of some osseous fishes. I. Development of the tail < Proceedings of the 

 American Academy, xm, pp. 117-127, 2 pis. (1877). 



'77 b . Sur le developpement des Pleuronectes < Journal de Zoologie vi, pp. 193-197' (1877). 



1 Owing to the long delay in the publication of this article for pursuing my investigations I would return thanks to Pro- 



I have had an opportunity to add extensively to it, having fessor Hyatt and Mr. Van Vleck for their kindness and the 



gone over much of the ground again during the summer of facilities afforded me during the two summers spent at 



1882. The additions, however, will all appear as foot-notes Annisquam. 

 each with the date 1882. For the opportunities enjoyed 



