28 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
summer, however, when dredging in the straits between 
Puffin and Beaumaris, we brought up one very young 
specimen of Dendronotus, which, if it had any connection 
with the specimens from Hilbre, was only one of their 
descendants, and now we have found another Dendronotus 
of much larger size, but still not quite full grown, close to 
Puffin Island. These are, perhaps, too slender grounds 
for drawing any definite conclusion from, but it is at least 
quite possible that these specimens may be descended 
from those set free in September, 1888, and if so, the 
species 1s probably now established in the neighbourhood 
of Puffin Island, and may be expected to turn up frequently 
in our future operations. 
We collected altogether on this occasion 13 species of 
Nudibranchs, including the rare Holis landsburgi; also a 
very remarkable sponge belonging to the genus Subervtes, 
and another sponge of a dark orange colour—one of the 
Desmacidonidee—which was found by Dr. Hanitsch in one 
of the caves. ‘This will probably turn out to be a very 
rare and interesting sponge as it is in symbiosis with a 
Loophyte. The hydrorhiza of the Zoophyte permeates the 
sponge in all directions and replaces to a certain extent 
the missing spongin fibres. The spicules of the sponge 
are found echinating the hydrorhiza of the Zoophyte. 
The only other notable sponges obtained from Puffin 
during the year were an undetermined species of Des- 
macidon from the caves, and a Chalinopsis found washed 
up, by the keeper, in February. 
The first Puffin was seen by the keeper on the island 
on April 9th, Dr. Hanitsch saw 2 or 3 on April 10th, and 
we all saw several pans on April 12th. 
At the end of June and beginning of July Mr. W. 
Thornely and Mr. F. V. Milward from Cambridge were at 
the station collecting Zoophytes and Polyzoa. Of the 
