[Herbert C. Kraft et al. (1994)] Invertebrates Crassostrea virginica, or the Eastern Oyster, is the dominant bivalved shellfish species in shell-matrix sites of the Lower Hudson River (Table 3). Visually, the oyster constitutes 100% of the matrix in the southern part of the Dogan Point Site, while quantitatively it constitutes much less of the total weight of the column sample. For example, in Column 4 on the western side of the deposit, shell in general comprises 74% of the weight of all constituents including dirt, 95.69% excluding dirt, and 99.91 % of the weight of shelled species. The salinity requirements for the species thought to best represent the immediate environment of Dogan Point suggest a salinity of 18-22 ppt 5500 years ago. The relative quantity of small and large Cliona sponge bore holes in the oyster shells indicate an aquatic habitat where the salinity was occasionally below 15 ppt and was above 20 ppt for onequarter to one-half of the year. The customary place to harvest the oysters found in Dogan Point was mixed muddy sand. Brennan made much of the large oysters he saw in several of the lower Hudson valley oyster sites and the so called "giant oyster" deposit was the main attraction to Dogan Point for Brennan. Using a mean umbo height of 1.22 cm, 71 proveniences were designated as "GO" although these shells are actually on the small side. There are few differences between the GO and SO shell levels in terms of bore holes, clustering, or height-length ratios.