Nachdruck verboten. 

 Uebersetzwn/srecht vorbehalten. 



Development of the Excretory Organs of a Myxinoid, 

 Bdellostoma stouti Lockington. 



By 



Gr. C. Price, 



Assistant Professor of Zoology in Leland Stanford Junior University, 

 Stanford University, California, U. S. A. 



With plates 16—17, 



The followlDg work has been done for the most part in the 

 Histological Laboratory of the University of München, and it gives 

 me pleasure to here express my thanks to the director, Professor 

 VON KuPFFER, for the privileges of the laboratory, which have been 

 so freely extended, and also for the many acts of kindness which he 

 has shown me. My thanks are also due to Dr. A. A. Böhm for 

 valuable assistance and constant kindness. 



The Myxinoids are usually regarded as the lowest or most gene- 

 ralized representatives of the Craniota. They are quite widely distri- 

 buted, and the adults can be obtained without difficulty. Since the 

 publication of Johannes Müller's great work ('36 — '45), the anatomy 

 of the group has been well knoAvn. Morphologists have quite natu- 

 rally supposed that the embryology of so low a representative of the 

 Vertebrates might present facts of more than ordinary interest, and 

 great etibrts have been put forth to obtain embryological material, 

 but heretofore all such etibrts have proved unsuccessful. 



While at the Hopkins Seaside Laboratory at Pacific Grove, Cali- 

 fornia, I was so fortunate as to obtain a few embryos of the Cali- 

 fornia representative of the group, Bdellostoma stouti. For a part of 

 this material, I am under obligations to my friends, Mr. C. J. Pierson 

 and Mr. R. C. Wilbur. In two recent preliminary papers (Price '96^, 



Zool. Jahrb. X. Abth. f. Morph. 14 



