542 



EEPORT — 1893. 



but at last found tbat picric acid ammoniac controlled by picrocarmine 

 was very suitable for the tissue. The picrocarmine having a slightly 

 fixing effect could be used in larger or smaller proportions, according to 

 the nature of the tissue. It at the same time afforded a good muscular 

 stain. For cilia I found tbat a few minutes' exposure to vapour of osmic 

 acid before dissociation gave good results. By these means I was able to 

 isolate cells of neural epithelium gills and glands, &c. 



Though some of the results of my work here have been negative rather 

 than positive I have reason to be satisfied, more especially with the 

 physiological facts ascertained. The material I have collected will be 

 used for the working out of further anatomical details, and the wbole will 

 form the subject of a future publication. 



Not among the least of the advantages which my stay at the Station 

 has afforded me was the opportunity of making the personal acquaintance 

 of other naturalists working in the same territory. I found our inter- 

 change of ideas and criticism invaluable. 



I have to express my gratitude to the Bi-itish Association for the 

 opportunity, which I could not otherwise have had, of completing my 

 work and making it more than a mere collection of anatomical details. 

 My thanks are also due to the authorities at the Station for their unex- 

 ceptionable kindness. 



III. A List of Naturalists ivho have worJced at the Zoological Station from 

 the end of Jim e 1892 to the end of Jvne 1893. 



