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_ obtain specimens for examination. Professor Harxer finds 
two species inhabiting the mud, one selecting decayed vegeta- 
_ tion, and another very active and handsome, dwelling in the 
_ eolonies of Spirogyra and Vaucheria in canals and lakes. He 
- described at some length the anatomy of the species. He then 
described his experiments and observations made on the worms 
when kept in tanks in the laboratory of the College at Ciren- 
cester. The result of his experiments led him to conclude that 
_ the Tubifex rivulorum does not make tubes of any kind, though 
all writers on the subject, notably Donner, Lamarcr, and 
D’Upexem have described it as a tube maker. He explained in 
detail his reasons for arriving at this conclusion. The life- 
history of these small annelids is, owing to their habits, a 
_ matter of some difficulty ; indeed, the investigations can hardly 
be carried on by continuous observations under natural con- 
ditions. Professor Harxrr stated that he had caused some 
tanks to be fitted up, with a view to carry on such observations, 
and he hoped to have some further remarks to communicate to 
the Club on a subsequent occasion. 
— Mr Wircuett exhibited a nodule from the Inferior Oolite 
of the neighbourhood of Stroud, which, on being fractured, 
revealed the ink-bog of a Sepia. 
THE FOURTH WINTER MEETING 
of the Club for the season was held on Tuesday, March 31st, in 
GLOUCESTER, 
when a paper was read by Mr Francis Day, F.L.S., entitled, 
Notes on the Breeding of the Salmonide.”’ Mr Day observed 
that although he had been favoured with permission to visit 
regularly the experiments in fish culture now being conducted 
at  Howietoun, N.B., he had arrived at the conclusion that he 
might, with very simple apparatus, carry out additional experi- 
ments of his own at Cheltenham. The object of his experi- 
nents was to ascertain—(l.) Can Salmon spawn in the sea? 
(2.) Are the eggs of fishes of the same species identical in size, 
no matter the age and weight of the parent, and if they differ, 
s 2 
