. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ANAEROBIC METABOLISM OF SNAILS 201 ous source of error. In view of this situation we do not present this phase of our experiments in detail. It may be mentioned that the tissues of Australorhis have a considerable alkaline reserve; one gram of tissue liberated upon acidification to pH about 2270 of carbon dioxide. 500 450 - 400 - 350 - to E 250 - cvi O 200 150 - 100 - 50. • Physo gyrina A Helisoma Duryi 8' 12 16 HOURS 20 24 28 FIGURK 1. Carbon dioxide production of Physa gyrina and Hdisown ditryi in relation to the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ANAEROBIC METABOLISM OF SNAILS 201 ous source of error. In view of this situation we do not present this phase of our experiments in detail. It may be mentioned that the tissues of Australorhis have a considerable alkaline reserve; one gram of tissue liberated upon acidification to pH about 2270 of carbon dioxide. 500 450 - 400 - 350 - to E 250 - cvi O 200 150 - 100 - 50. • Physo gyrina A Helisoma Duryi 8' 12 16 HOURS 20 24 28 FIGURK 1. Carbon dioxide production of Physa gyrina and Hdisown ditryi in relation to the length of the anaerobic period. It was established that the snails did not have volatile acids in their tissues before they were subjected to anaerobic conditions. Control determinations with snails taken directly from the aquaria were done with each species and yielded completely negative results. After being exposed to anoxic conditions, on the contrary, signifi- cant amounts of volatile acids were found in every case both in the medium and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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