U. S. Bureau of Fisheries, 1937 
Bulletin No. 23 
Figure 22. — Photographs of special spat collectors bearing oysters about 1 year old. Collector as a whole is shown above in 
upside-down position. Lack of spat on bottom due to soft ground on which it was placed. Lower photograph shows an 
under horizontal surface. Total length about 12 inches. 
