REPORT OF COMMISSIONERS OF INLAND FISHERIES. 33 
4 indicates that the record for the specimen photographed is not 
exceptional or accidental. 
Another experiment made to ascertain the rate of growth of in- 
dividual clams was tried at the house-boat. On July 19 sev- 
eral specimens were carefully measured and placed in small flower- 
pots which were filled with sand. These were kept continuously 
under water, and the clams measured again on September 10. 
The measurements on the two dates, as given below, show that 
the clams had grown during seven and a half weeks to two or 
three times their original length. 
Record of Growth of Clams in Pots at House- Boat. 
Number. July 19. September 10. 
(7 aay eee ot 11-11 (2 specimens). 96-23 
(RE Ae 9.2 22 
(3) De ree 7.5 — 
(ne 8.1 27 
(S00 See 12D 28 
(Co ee ee a 10.9 30 
Wills; ative nhac lawak So: Akiba 25 
(Cc) ha Seda ae 8.9 30 
(3) eae Pare 10.5 22 (shell only). 
UL) ee ate ses cra § 11.5 20 (shell only). 
Gas .. Lid 27 
(1D) are Ber ae 9.0 26 
The following will give an idea of the relative increase in bulk 
‘of the clams at the house-boat as compared with those on the shore. 
On August 9 the clams on the point of shore to which we have 
several times referred were measured by the pint and counted. 
The average number to the pint was about 1,200. The clams which 
were taken from the same locality on July 7 and 9, and which had 
been kept in a box of sand at the house-boat since that date, now 
measured about 400 to the pint. The clams at the house-boat, 
therefore, appeared to have so far outstripped those on the shore 
5 
