REPORT OF COMMISSIONERS OF INLAND FISHERIES. 41 
old. Compare with those remaining on the shore until August 
29. Photograph life-size. 
17. Specimens selected to represent the average size of clams 
taken on July 7, 1899, from a marked area on Cornelius Island, 
Wickford, R. I., and reared in a sand-box at the house-boat until 
September 8. These specimens are, probably, about fourteen 
weeks old. Compare with those remaining on the shore until 
September 7. Photograph life-size. 
18. Specimens selected to represent the average size of clams 
taken on July 7, 1899, from a marked area on Cornelius Island, 
Wickford, R. I., and reared in a sand-box at the house-boat until 
Septemper 19. These specimens are, probably, about sixteen 
weeks old. Compare with those remaining on the shore until 
September 30. Photograph life-size. 
19. The large specimen was taken on September 18 from a 
land-tile set in the mud on the shore (Wickford), at low-water 
mark. It was placed in the land-tile on July 22, when it was the 
size of the smaller specimen. The difference in size represents 
two months’ growth. Photograph life-size. 
20. These specimens represent the average size of the larger 
of the clams at low-water mark in a certain locality on the shore 
at Wickford on September 7. (Compare with those from the 
same locality at half-tide mark.) Photograph life-size. 
21. These specimens represent the average size of the larger 
clams at half-tide mark in a certain locality at Wickford on Sep- 
tember 7. (Compare with those from the same locality at Jow- 
water mark.) 
22. These specimens were found among the barnacles clinging 
-7 
to the outside of the house-boat on September 7. They have 
never been covered with sand or soil of any kind, and are stubby 
and thick-shelled. Photograph life-size. 
23. These specimens were taken on September 7, from the 
side of the sand-box in the house-boat, and show how the clams 
of considerable size may remain anchored to ‘various objects, or 
6 
