. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 92 RICHARD E. LEE in this zone; whereas several organisms (Echinarachnicits parma, Unciola irrorata, Scolopolos fragilis) were also found in the coarse sand bottom of Zone 1, at much shallower depths. DISTRIBUTION OF AMPELISCA MACROCEPHALA. rORNICATA. AND CLYMENELLA SP. 20 LITERS Or SAMPLE. OVER IO CLYMENELLA OVER IOO CLYMENELLA OVER IO AMPELISCA OVER 50 AMPELISCA OVER 10 CREPIDULA OVER IOO CHEPIDULA CHART 4. The distribution of the three most numerous invertebrate animals in Menemsha Bight. The regions in which a common org
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 92 RICHARD E. LEE in this zone; whereas several organisms (Echinarachnicits parma, Unciola irrorata, Scolopolos fragilis) were also found in the coarse sand bottom of Zone 1, at much shallower depths. DISTRIBUTION OF AMPELISCA MACROCEPHALA. rORNICATA. AND CLYMENELLA SP. 20 LITERS Or SAMPLE. OVER IO CLYMENELLA OVER IOO CLYMENELLA OVER IO AMPELISCA OVER 50 AMPELISCA OVER 10 CREPIDULA OVER IOO CHEPIDULA CHART 4. The distribution of the three most numerous invertebrate animals in Menemsha Bight. The regions in which a common organism is most abundant are likewise characterized by a relatively greater number of different species (cf. Chart 3). Zone 4 In the region about stations 89 and 90, a patch of medium grained white sand was discovered. There was little qualitative difference between the fauna of this zone and that found in Zone 3 (Table II). There was a slight quantitative differ- ence, however, for the catches from Zone 3 were somewhat greater than those ob- tained from Zone 4 (Table III). Zone 5 This zone was found between the 10- and the 14-meter depth contours along the eastern shoreline of the Bight (Chart 2). The bottom material of this region was of a soft fine clay, containing stones of walnut size and a considerable amount of nitrogenous matter near its surface. Mr. H. C. Stetson 5 informs me that this bottom deposit is probably of glacial origin, and contains very little marine sedi- 5 The author is indebted to Mr. Henry Stetson, Marine Geologist at the Oceanographic In- stitution, for his identification of the bottom material in the major zones of Menemsha 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. ). Annu
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