SEA-FISHERIES LABORATORY. 151 
‘the developmental stages of the clam, the rate of 
‘“‘erowth of the scallops, the causes of mortality of 
‘‘lobster fry, and the pathogenic bacteria infesting fish. 
“With the co-operation of the Marine Biological 
‘“‘ Laboratory, it is proposed to make a series of syn- 
‘“‘chronous observations on the temperature and floating 
“fauna of Vineyard Sound. The combined vessels of 
“the two laboratories provide a sufficiently large fleet 
‘“‘to make these observations of special interest. It is 
‘‘also proposed to resume again the deep-sea work 
“beoun by the Commission many years ago, though the 
‘temporary use of the ‘ Fish Hawk’ by the United States 
‘““navy will prevent the work from being undertaken 
“the present season. 
Mr. Andrew Scott’s work at the Piel Laboratory and 
Hatchery has consisted in the hatching of young food fish 
and lobsters, and certain experiments in their rearing, in 
the examination of tow-nettings taken by the bailiffs along 
the coast, and in carrying on observations for me in regard 
to the conditions under which oysters and other shell-fish 
become green. A little further on (p. 163) will be found 
Mr. Scott’s own report upon the hatching operations, but 
I desire to make a few remarks here as to the conclusions 
to be drawn from the experiments. 
In the first place, hatching must be carefully distin- 
guished from rearing. So far as regards the hatching out of 
a very large proportion of the ova supplied to the tanks, the 
operations at Piel have been entirely successful. 
Out of about four million of healthy fertilised ova sup- 
plied, a total of 3,319,000 larvee were hatched and set free 
in suitable localities on the off-shore grounds. 
In the case of lobsters, the ova on 13 berried females 
were, with almost no loss, retained in a healthy condition 
