348 The Naturalist of Cumbrae. 



the few forms that inhabit comparatively shallow 

 water, and it is to deep-sea dredging in the North 

 Atlantic during the past twelve or fourteen years 

 that we owe the discovery of nearly all the more 

 important members of the group." 



It may be thought that all this, however interest- 

 ing in itself, has not much to do with the life of 

 Robertsoii) but it was necessary, by way of introduc- 

 tion to what follows, for when Mr. Brady comes to 

 discuss the above-mentioned genus, Dendrophrya, he 

 writes as follows ; 



" For twenty years the genus appears to have 

 remained entirely unnoticed by rhizopodists. As the 

 subject appeared to be one of some importance, and 

 there were many points concerning which additional 

 information was required, I called the attention of 

 my friend, Mr. David Robertson, F.G.S., to the 

 original paper, thinking it possible that he might 

 have met with the organism during his long and 

 varied experience in shore collecting. This did not 

 prove to be the case, but the subject was one that 

 interested him so much that he made a visit to the 

 recorded locality, Old Granton Quarry, near Edin- 

 burgh, in the hope that the species might still be 

 found there. Unfortunately, on that occasion the 

 search was unsuccessful ; but ere long I received 

 from him a number of specimens gathered from 

 similar localities on the west coast of Scotland, 

 amongst which it was not difficult to recognize 

 Dendrophrya radiata. In company with it was an 

 erect branching modification of the same type, which, 

 though it does not agree in all points with the figure 



