EXPLANATION OF PLATES. 



Plate I. 



Fig. 1. Station 385. 720 fathoms. Coarse Globigerina Ooze. 



Orhulina nnii«reod'Orbigny, Globigerina conglobataBrsidj, Sphseroidina huUoides 

 d'Orbigny, Candeina nitida d'Orbigny, Pulvinulina menardii d'Orbigny, 

 P. tumida Brady, P. micheliana d'Orbigny. 

 Magnified 15 diameters. 

 Fig. 2. Station 385. 720 fathoms. Fine (irlobigerina Ooze. 



Mostly Globigerina bulloides d'Orbigny, with fragments of Orbulina universa 



d' Orbigny. 

 Magnified 15 diameters. 



Plate II. 



Fig. 1. Station 645. 1,102 fathoms. 



Silicons casts of foraminifera, after treatment with hydrochloric acid. 



Magnified 15 diameters. 

 Fig. 2. Red Clay Sediment. 



Manganese concretions, volcanic sand, crystals of phillipsite, tooth from the 

 lingual ribbon of a moUusk. 



Magnified 15 diameters. 



Plate III. 



Fig. 1. Station 688. 1,346 fathoms. 



Manganese-iron concretions. 



Magnified 15 diameters. 

 Fig. 2. Station 338. 2,128 fathoms. 



Stellate crystals and spherules of phillipsite. 



Magnified 15 diameters. 



Plate IV. 



Fig. 1. Station 670. 1,376 fathoms. 



Dark brown, translucent glass, from volcanic mud. 



Magnified 15 diameters. 

 Fig. 2. Station 995. 2,091 fathoms. 



Filamentous, colorless volcanic glass. 



Magnified 15 diameters. 



Plate V. 



Fig. 1. Station 746. 2,788 fathoms. Diatom Ooze. 

 Coscinodiscus rex Wallich. 

 Magnified 15 diameters. 61 



