MUEKAT— DEPOSIT-SAMPLES. 379 



"So. 3. May 19, 1905. 

 Lat. 5° 3' S., Long. 71° 11' E.; depth, 2023 fathoms. 



(a) Bottom of sounding-tube. 



GLOBIGE'RINA OOZE : light fawn colour, mottled darker in places. 



Calciom Carbonate : 64'39 per cent., pelagic and bottom-living Foraminifera, Coceoliths. 



Residue : 35"61 per cent. : — 



Siliceous Organisms (5 per cent.) : Sponge spicules, Radiolaria, arenaceous Foraminifera, 



Diatoms. 

 Minerals (traces) : only one or two glassy particles observed, and one angular particle of 



felspar. 

 Fine Washings (30"61 per cent.) : amorphous clayey matter with siliceous fragments. 



(b) Top of sounding-tube. 



Microscopic examination revealed little difference in the relative proportions of the 

 constituents in this deposit, except that fewer bottom-living Foraminifera were re- 

 cognised in this upper portion. Analysis gave a higher percentage of calcium carbonate, 

 viz. 75-59. 



No. 4. June 19, 1905. 

 Lat. 5° 29' 50" S., Long. 71° 51' 20" E., 4 miles S. of Peros; depth, 760 fathoms. 



GLOBIGERINA OOZE : greyish white. 



Calcium Carbonate : 88'26 per cent., pelagic and bottom-living Foraminifera, Pteropod fragments, 

 Echinoid spines, Gasteropods, Heteropod fragments, Coral fragments, Tunicate spicules, Fish 

 otoliths, Laraellibranchs, Coceoliths, Rhabdoliths. 

 Residue : 11'74 per cent. : — 



Siliceous Organisms (I per cent.) : Sponge spicules, Radiolaria, fragments of arenaceous 



Foramiuiferaj Diatoms. 

 Minerals (trace) : one or two glassy particles. 

 Fine Washings (10'74 per cent.) : amorphous clayey matter. 



No. 5. June 19, 1905. 

 Lat. 5° 37' 20" S., Long. 71° 51' 50" E., 11 miles S. of Peros; depth, 810 fathoms. 



GLOBIGERINA OOZE : dirty grey, slightly coherent. 



Calcium Carbonate : 7060 per cent., pelagic and bottom-living Foraminifera (the pelagic forms 

 including many primordial cells and young individuals), Ostracodes, Tunicate spicules, Echinoid 

 spines, a few small Coceoliths, Cephalopod beak. 

 Residue : 29"40 per cent. : — 



Siliceous Organisms (5 per cent.) : Radiolaria, Diatoms, Sponge spicules, fragments of 



arenaceous Foraminifera. 

 Minerals (traces) : only one or two glassy particles observed. 



Fine Washings (24-40 per cent.) : amorphous clayey matter with fragments of siliceous 

 organisms. 

 SECOND SERIES. — ZOOLOGY, VOL. XIII. 51 



