174 THE ATLANTIC. [CHAP. mI. 
having a specific gravity of 1:02619 at 20°°5 C. The dredge 
was put over at 5 p.m. with 8400 fathoms of line, and was kept 
down till 1 o’clock a.m. on the following morning, the ship drift- 
ing slowly. Our position at noon on the 21st was about 500 
miles S.W. of Teneriffe, lat. 24° 22’ N., long. 24° 11’ W., Som- 
brero Island 8. 58, W. 2220, miles. Work began early on the 
Fie. 39.—Area (sp.). (No. 5.) 
22d, and the dredge, which had begun its ascent at 1.15 a.m., 
came up at 5.45 half full of a yellowish ooze, which was not so 
tenacious as usual, and on the whole singularly poor in higher 
living things. A careful and laborious sifting of the whole 
mass gave us three small living mollusks, referred to the genera 
Fra. 40.—Limopsis (sp.). (No. 5.) 
Arca (Fig. 89), Limopsis (Fig. 40), and Leda (Fig: 41); and two 
bryozoa apparently undescribed. Foraminifera were abundant, 
many examples of miliolines being of unusually large size. 
Some beautiful radiolarians were sifted out of the mud. These 
may have been taken into the dredge on its way up; or, more 
probably, they may have lived on the surface or in intermedi- 
ate water, and have sunk to the bottom after death, since they 
consist of continuous fenestrated shells of silica. 
