20 BULLETIN 55, UNITED STATES NATIONAL MUSEUM. 



nodule, originalh^ about 25 millimeters in diameter, probably broken 

 by concussion of the sinker. Nucleus of the nodule is a porous, straw- 

 colored fragment of pumice. 



Station 1^78. — 2,708 fathoms. Red cla3^ Dark brown. No foram- 

 inifera. A few radiolaria. Washed sediment mostly volcanic glass. 



Station Jf98. — 3,185 fathoms. Red cla}^. Numerous manganese 

 concretions, crystals and nodules of phillipsite. No organic remains. 



Station 506. — 2,169 fathoms. Globigerina ooze. Color, brownish- 

 white. Shells much broken. Foraminif era mostlj^ pelagic; individual 

 specimen of Lagena gracilis. A few coccoliths and rhabdoliths. Sev- 

 eral rather large manganese nodules, 10 millimeters in diameter. 



Station 5^1. — 3,356 fathoms. Red clay. Chocolate color. No 

 organic remains. Washed sediment consists of tine sand containing 

 small manganese nodules, aggregated crystals of phillipsite, volcanic 

 glass, and other minerals. 



Station 530. — 3,118 fathoms. Red clay. Brown mud. No organ- 

 isms. Nodules of manganese and of phillipsite; decomposing pumice. 



Station 5^i.— 1,846 fathoms. Globigerina ooze. Creamy white. 

 Foraminifera mostly pelagic. Nonionina noted. Very few mineral 

 particles. 



Station 559. — 3,658 fathoms. Diatom ooze. Fine, light-brown 

 mud. Relatively small quantity of clayey matter. Sediment com- 

 posed of fragments of large diatoms; {Coscinodisous rex Wallich) 

 radiolaria in abundance. Volcanic ashes. 



Station 575. — 4,563 fathoms. Red clay. A fine, brown mud with 

 a large percentage of clayey matter, and notable for the absence of 

 manganese concretions. Washed sediment principally clear, trans- 

 parent fragments of volcanic g'lass. 



Station 591. — 4,204 fathoms. Red clay. No organic remains. 

 Mineral matter rather coarse volcanic fragments. Very few manga- 

 nese concretions. 



StationGOO. — 2,536 fathoms. Volcanic mud. Grayish- brown. No 

 foraminifera; no effervescence with acid; a few radiolaria. Sediment 

 consists of volcanic debris, with very little fine washings. Numerous 

 manganese concretions, yellow-brown to red-brown particles of pala- 

 gonite, and vitreous fragments. 



Statio7i 603. — 1,745 fathoms. Volcanic mud. Gray, granular mud. 

 About 25 per cent of the sediment consists of pelagic foraminifera; 

 the remainder is a rather fine volcanic sand containing manganese con- 

 cretions, palagonite, and vitreous fragments in large proportions. 

 Many magnetic particles. 



Station 613. — 1,072 fathoms. Pure globigerina ooze. Pelagic 

 foraminifera with few exceptions. One Lagena glohosa and one 

 Gaudryina j^ujyoides noted. 



