60 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



The Hebridean Green Syntethys (Diazona violacea). 



It will be remembered that in last year's report we 

 described a rare and interesting compound Ascidian colony 

 which is bright green when alive and becomes of a beautiful 

 violet mauve tint when preserved in alcohol. I am probably 

 correct in saying that until last year only two specimens of 



Fig. 18. — Pennatula phosphorea, alive in a jar of sea-water : natural size. 



[Photo, by Prof. E. Newstead. 



this rare animal from the Hebrides were known to science, the 

 first one found by Prof. Edward Forbes off the Croulin Islands 

 in 1850, and a second dredged by the late Duke of Argyll off 

 the North of Mull in 1884. We got one good colony in the 

 summer of 1912 off Barra Head, in the open Atlantic, and 

 some small fragments further north, in the Minch. This year 



