NO. I FORAMINIFERA IN LONG ISLAND SOUND — BUZAS 17 



ern end of a traverse always has a very high percentage of E. clavatum, 

 which diminishes as B. frigida becomes more abundant and reaches 

 a maximum 4 or 5 nautical miles from the Connecticut shore. As the 

 percent of B. frigida decreases, E. advena increases and dominates the 

 central area. At the southern end of the traverses there is a sugges- 

 tion of another increase in the relative abundance of B. frigida and 

 E. clavatum, but symmetry is not achieved. E. advena is not nearly 

 as well developed in traverse 4 as it is in the other two traverses. 



Traverse 5 is located about 12 nautical miles east of traverse 4. It 

 includes stations 51-57 from south to north respectively. Foramini- 

 f era are very rare in this traverse. A few living individuals belonging 

 to the species Trochammina squamata and Poroeponides lateralis 

 were observed. 



Traverse 1 is located about 14 nautical miles west of traverse 2. 

 It consists of stations 110 and 111. Table 3 (page 72) shows that 

 these stations have a percentage distribution of species similar to the 

 stations in the central areas of the other traverses. 



The areal distribution of Elphidium clavatum in percent of the 

 living populations is shown in figure 5. About 3 to 4 nautical miles 

 from shore at depths of less than 20 m., E. clavatum usually comprises 

 over 70 percent of the living population. In very shallow water the 

 abundance of this species increases to over 90 percent. E. clavatum 

 is abundant in near-shore areas on both sides of the Sound but is not 

 found in the near-shore area of Long Island east of longitude 73° 10'. 

 This latter area is composed of coarse quartz sand, and almost no 

 foraminifers were found there except at station 50. In the central 

 areas of L.I.S., E. clavatum occurs with much lower frequencies. 

 In traverse 2 its minimum occurs farther south than in traverse 3 

 and 4. 



The areal distribution of Buccella frigida in percent of the living 

 population is shown in figure 6. In traverses 1 and 2 its maximum is 

 confined to a narrow band north of center. In traverse 3, however, 

 this species becomes more abundant, and farther east in traverse 4 it 

 commonly comprises over 20 percent of the living population. 



The areal distribution of Eggerella advena in percent of the living 

 population is shown in figure 7. This species has an almost sym- 

 metrical distribution pattern. It reaches a maximum of over 70 per- 

 cent in the central area and decreases in relative abundance toward 

 the north and south. In traverse 4, E. advena occurs with very low 

 frequencies south of its maximum. This species is absent from many 

 of the near-shore stations. 



