~-119- AECD-3446 Section X INVERTEBRATES by Kelshaw Bonham etIdeally the basis for evaluation of intensity of activity at the various ities from invertebrate tissue counts would consist of a comparison of the he'species from all the localities. Since it was not feasible to collect identi- pecies from all localities, the comparison was madeon the basis of available * Identification of sponges and sea cucumbers was undertaken by Margaret E. Dunn whoisolated the microscopic skeletal elements by dision of soft parts. Sponges were identified at least as to order and someto Most of the sea cucumbers were identified as to species. uy one or portions of one were used. Mostof the Numbers of specimensas identified for hing are tabulated by stations in Table 1. Invertebrate samples were ashed in September, 1949, and in accordance the policy of counting control area samples first, the ashed Likiep invertees and algae were plated and counted from November 22 to December9, 1949, e the invertebrates and algae from other localities were counted from February o March 10, 1950. Counting was done in the Nucleometers as described earlier™ the report. Counts per minute per gram of ash above background plus 3 stand- rd deviations were corrected back to wet tissue for each sample m/g)to obtain the average count for the area. and averaged Average c/m/g were converted to usintegrations per minute per gram (d/m/g) by using a factor of 1.5. Values ven are for entire organisms unless otherwise stated. The averages for different alities are based upon various species and numbers of specimensandinclude all ed samples (see Table 2). The distribution of radioactivity of ashed inverte- rates among the localities sampled was much as would be expected, being greatest UNIVERSITY 3APCUIVES UNLV, OF WW