NO. I FORAMINIFERA IN LONG ISLAND SOUND BUZAS 13 



temperature than the more restricted waters of L.I.S. On the aver- 

 age, stations in L.I.S. have fewer species and greater dominance by a 

 single species than the more open-ocean waters of Block Island 

 Sound. 



In the total population 10 species were found in traverse 1, 13 in 

 traverse 2, 14 in traverse 3, and 19 in traverse 4. In the living 

 population the number of species in the traverses are 8, 10, 12, and 

 14 respectively. The increase of species to the east is probably due 

 to two factors, namely, migration into L.I.S. by open-ocean species 

 would take place from that direction, and there is an increase in 

 salinity of 3-5 % from west to east. 



Distribution of the Living Population 



Frequency distributions were drawn for the percent of all the com- 

 mon species, but only the distributions for Elphidium clavatum, Buc- 

 cella friglda, and Eggerella advena show a consistent pattern. Trav- 

 erse 3 was sampled at seven different times, and the three abundant 

 species show the same pattern over and over again. In order to 

 present the data concisely, the 88 seasonal stations taken in traverse 

 3 were grouped into 13 "grand" stations. Table 4 (page 80) shows 

 the correlation of the seasonal stations with the grand stations. The 

 number of individuals of each species from the seasonal stations in a 

 grand station were added and the percent distribution calculated. 



Figure 2 shows the distribution of B. frigida, E. advena, and E. 

 clavatum in percent of the living population for the 13 grand stations 

 of traverse 3. Station 1, which is composed of coarse sand (Md 

 0.8), is about \\ nautical miles off the Long Island shore. It was 

 sampled three times and yielded only five foraminifers. The remain- 

 ing stations (2-13) are about 1 nautical mile apart in a northerly 

 direction. It should be emphasized that the same pattern shown in 

 figure 2 was observed each time traverse 3 was sampled. 



Traverse 2 is about 10 nautical miles west of traverse 3. Stations 

 114-124 are located about 1 nautical mile apart from south to north 

 respectively. No sample was obtained at station 115. The same 

 pattern observed in traverse 3 is repeated in traverse 2 and is shown 

 in figure 3. 



Traverse 4 is located about 14 nautical miles east of traverse 3. 

 Stations 34-48 are located about 1 nautical mile apart from north to 

 south respectively. Figure 4 shows the distribution of the abundant 

 species. 



Traverses 2, 3, and 4 all show the same general pattern. The north- 



