96 BARNARD 



PLATE 1 



Fig. A. Abundance of chelurids and limnoriids on test blocks sus- 

 pended in the harbor on Sept. 29, 1951, and retrieved every 

 28 days thereafter for 7 intervals. California Yacht Harbor. 



B. Percentage of adult and juvenile chelurids on the same test 

 blocks as in fig. A. Black portions of the histograms repre- 

 resent adults; clear portions, juveniles. Above the histo- 

 grams is a curve representing the average length of the 

 animals from each collection. 



C. Chelurid furrows after one month of exposure in the labora- 

 tory; cross section, x 2. 



D. The same furrovps as in fig. C after 3 months exposure. 



E. Another block of wood exposed to chelurids for five months, 

 showing a different orientation of the grain, x 2. 



F. Oblique view of the same chelurid furrows seen in fig. C. 



PLATE 2 

 Fig. A. Limnoriid infested wood from Los Angeles Harbor, x '/s- 



B. Limnoriid infested wood exposed for 16 months in the lab- 

 oratory, X y2. 



C. Limnoriid-chelurid infested wood exposed for 12 months in 

 Los Angeles Harbor, x Y^. 



D. Limnoriid-chelurid infested wood exposed for 16 months 

 in the laboratory, x Y%. 



E. Chelurid furrows produced in the laboratory after exposure 

 for three months, x ^. 



F. Another block with chelurid furrows produced in the lab- 

 oratory after exposure for three months, x Y%. 



