422 
Proceedings of Royal Society of Edinburgh. [sess. 
S.S. ‘ Britannia,’ No. 3, 5th November 1897. Lat. 21° 26' 52" N., 
long. 71° 10' 22" W., 598 fathoms. 
CORAL MUD, white, chalky. 
Calcium Carbonate [86*04%], small particles of Corals and cal- 
careous Algae, with bottom-living and pelagic Foraminifera 
(including Polytrema and Globigerina rubra), fragments of 
Pteropods, Heteropods, and other pelagic Molluscs, Alcyo- 
narian and Tunicate spicules, Ostracodes, Echini spines, 
Cephalopod beaks, coccoliths. 
Residue [13*96%], 
Minerals (1%), glassy particles, quartz. 
Siliceous Organisms (3%), Sponge spicules, Diatoms, Radio- 
larians, and imperfect casts of calcareous organisms. 
Fine Washings (9*96%), amorphous clayey matter, with very 
minute particles of minerals and siliceous organisms. 
S.S. ‘ Britannia,’ No. 18, 6th November 1897. Lat. 21° 11' 49" N., 
long. 71° 17' 34" W., 836 fathoms. 
The material consists of fragments of Coral or calcareous Algae 
(or Polyzoa'?), fragment of a large Foraminifer ( Orbitolites or 
Carjpenteria ), and fragment of a Gasteropod shell. 
S.S. ‘ Britannia,’ No. 32, 7th November 1897. Lat. 21° 2' 53" N., 
long. 71° 20' 9" W., 224 fathoms. 
The material is similar to No. 18, consisting of fragments of 
Coral or calcareous Algae, of Foraminifera ( Carpenteria ), and of 
Mollusc shells. 
S.S. ‘ Britannia,’ No. 38, 7th November 1897. Lat. 20° 52' 55" N., 
long. 71° 30' 7" W., 260 fathoms. 
PTEROPOD OOZE, cream colour. 
Calcium Carbonate (90%), Pteropods, Heteropods, and other 
pelagic Molluscs and their fragments, pelagic and bottom- 
living Foraminifera, Echini spines, Alcyonarian and Tunicate 
spicules, coccoliths, rhabdoliths. Many of the organisms (or 
