158 LIVERPOOL BIOLOGICAL SOCIETY. 
Dendronotus arborescens. 
A. Shanny Tank :— 
Dendronotus 1.—Seized at once by the large shanny and 
kept in mouth, half the nudibranch projecting. 
This shanny was pursued by others, one of which 
caught the projecting end of the prey, and in the 
ensuing struggle tore half the body off and eat 
it. The large shanny at once retreated with the 
remainder to the back of the tank; came out 
shortly afterwards with the Dendronotus still in 
mouth, and was again pursued and retreated to 
the back, appearing again soon without the nudi- 
branch. 
C. Table Tank :— 
Dendronotus 1.—Pounced upon at once by three bullheads 
which made rapid dabs at it successively, until 
one secured it and carried it off to a quiet place 
where he seized 1t in his mouth and rejected 1% 
nine times in succession, each time taking it 
half into the mouth and keeping it there for 
some seconds, then spitting it out and at once 
pouncing upon it again. Finally the now some- 
what mangled remains of the Dendronotus were 
taken out and put into tank A, where one of 
the shannies at once seized and swallowed it. 
The Dendronotus was large. It was larger than 
the head of the Cottus, and caused the mouth 
cavity to bulge out greatly when half taken in. 
The general impression was that the Cottus found 
the Dendronotus desirable food but an uncom- 
fortably large mouthful and was trying to worry 
it to pieces. 
