Table 4.6 —-INVERTEBRATE SAMPLES WITH HIGHEST ACTIVITY, PRETEST Activity, Organism Tissue or organ Snail, Nerita polita Sponge Sea hare, Dolabrifera Soft parts Entire Gut with much sand Urchin, Echinometra Gut and contents Snail, Polinices Locality d/m/g (x 1000)* Runit Engebi, outer Engebi, outer 80 48 22 Engebi, outer 18 Egg collar, mostly sand Runit, dredge 17 Worm, sipunculid Entire Runit 17 Snail, Cymatium Sponge, black Soft parts Entire Engebi, outer Bogombogo 16 16 Snail, Strombus maculatus Soft parts Engebi, outer Clam, Pinna Clam, Pinna Shell and byssus Soft parts 15 Engebi, outer Engebi, outer 14 9 *Wet sample. Table 4.7 - FREQUENCIES OF INVERTEBRATE ASHED-SAMPLE COUNTS BY MAGNITUDES,. PRE- AND POSTTEST* Magnitude, d/m/g (x 1000), wet sample Aomon and Japtan Igurin Rigili Bogombogo Engebi Aaraanbiru Runit 9 2 23 17 6 6 2 15 9 3 1 18 11 2 Pretest Background 0.01-0.1 0.1-1 1-10 10-100 44 1 4 15 6 2 11: 8 13 1 11 3 20 11 1 Posttest Background 0.01-0.1 01-1 1-10 10-100 100-1000 1,000 -10,000 10,000 —-100,000 13 21 15 1 2 34 25 4 5 34 37 14 5 14 4 8 9 3 1 9 9 4 2 3 20 24 3 * Frequencies are for major collecting localities, exclusive of dredged material. Table 4.7 also serves to demonstrate that the frequency of distribution of logarithms of counts in the posttest series is approximately of the normal form, whereas the distribution of the observed counts would.be strongly skewed. In the pretest series the distribution of the logarithms of the counts is normal only in the hotter areas and then only if background counts are excluded. 33 UNCLASSIFIED