42 



whole the young growth over 1 inch in length is numerically more 

 than double that under 1 inch. 



The following table exhibits the data obtained from the several 

 examinations made: 



Details of Examination op Wreck Shoal Rock. 



Station 

 num- 

 ber. 



Date of ex- 

 amination. 



Mean 

 depth 

 of wa- 

 ter. 



Character of growth. 



Oyst 



srs caught per 



square yard. 



Spat. 



Culls. 



Counts. 



0.0 



16.7 



10.3 



7.1 



30.3 



.0 



2.5 



24.6 



3.8 



23.7 



34.6 



.4 



17.9 



69.2 



5.0 



18.3 



28.6 



1.4 



21.8 



44.6 



3.6 



9.5 



57.7 



.0 



26.7 



46.9 



.3 



43.0 



45.0 



.4 



15.8 



18.9 



4.2 



12.7 



31.8 



2.3 



3.6 



30.0 



2.7 



38.1 



41.2 



.8 



27.7 



60.0 



1.2 



9.5 



30.9 



.4 



Estimated 



quantity 



oysters per 



acre. 



193 

 194 

 195 

 196 

 197 

 201 

 202 

 203 

 204 

 205 

 206 

 209 

 428 

 429 

 430 

 431 



Aug. 19,190 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



do 



Aug. 31,1909 



do 



do 



do 



Feet. 

 12.0 

 9.0 

 8.0 

 9.0 

 6.5 

 12.0 

 11.0 

 11.0 

 10.0 

 7.0 

 11.5 

 14.5 

 15.0 

 6.5 

 8.5 

 16.5 



Dense. 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 

 ....do 



Bushels. 

 195 

 191 

 178 

 301 

 497 

 254 

 379 

 343 

 379 

 456 

 222 

 252 

 200 

 413 

 460 

 210 



DRY SHOALS ROCKS. 



These are 5 small rocks lying west of the preceding on and about 

 shoals which ebb nearly or quite bare. They are in general isolated 

 and surrounded by deep water, though two of them are connected by 

 narrow ridges of depleted bottom with Swash Eock and Mulberry 

 Swash Rock, respectively. 



Their present condition and extent are shown in the following 

 table : 



Oyster Growth on Dry Shoals Rocks. . 



Character of growth. 



Area. 



Oysters 

 per acre. 



Estimated 

 total con- 

 tent of 

 oysters. 



Dense 



A arcs. 



126 



18 



9 



21 



Bushels. 



244 



124 



85 



20 



Bushels. 

 30, 766 



Scattering 



2,232 



Very scattering 



765 



Depleted 



420 







Total 



174 





34,183 









Four of these rocks are composed wholly or in major part of bot- 

 tom bearing a dense growth of oysters, while the fifth, the smallest, 

 bears a scattering growth exclusively. . The dense growth in its daily 

 yield to the tonger varies, with the locality, between 13 and 59 bushels, 

 the average density over the entire area being sufficient to permit a 



