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TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
in several tanks and fully maintained the interest shown by 
the visitors of previous years in our economic work. The 
lobster larvae also excited much interest. The display of sea- 
anemones in the table tanks never fails to attract attention ; 
and to these Miss E. C. Herdman, at the latter end of the season, 
added a number of interesting species—Czona wntestinalis, 
Sabella pavona, Hols rufibranchialis, Doto fragilis, Idotea 
marina (both sexes and young), Antedon bifida and others. 
A group of specimens of the sand anemone, Haleampa crysan- 
thellum, inhabit a small glass dish filled with sand, and afford 
a remarkable example of the very close resemblance, in colour 
and markings, of many marine animals to their surroundings. 
The disk and tentacles of Halcampa present the same speckled 
appearance as the sand on which the latter are allowed to rest 
when the animal is fully expanded, and are not easy to detect, 
even to the practised eye. A large specimen of the Mollusc 
Pleurobranchus membranaceus was one day seen to swim 
voluntarily round and round the table tank in which it lived 
for some time during the summer. Swimming was effected 
by the lateral margins of the foot, which, with graceful curva- 
ture, were flapped dorsally and ventrally in much the same 
way as a Skate or ray uses its lateral ‘ wings.’ The animal was 
under observation for about twenty minutes, durmg which 
time it swam actively, with only two or three brief intervals 
of rest. Less than an hour before this it deposited a large coil 
of spawn on the gravel at the bottom of the tank. 
General. 
“The occurrence of various Invertebrates, especially - 
medusz, in our spawning ponds has been recorded from time 
to time in our Annual Reports. This year a species of Sarsia 
appeared in large numbers during the plaice hatching season. 
Mr. EK. T. Browne, to whom specimens were submitted for 
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