424 
Proceedings of Eoyal Society of Edinburgh. 
S.S. ‘Britannia/ No. 45, 8th November 1897. Lat. 20° 38' 12" N., 
long. 72° 9' 3" W., 2308 fathoms. 
BLUE MUD, of a green-grey colour. 
Calcium Carbonate [11 *34%], a few fragments of pelagic 
Foraminifera (one perfect specimen of Globigerina con- 
globata observed) and Pteropods, coccoliths, rhabdoliths. 
Residue [88*66%], 
Minerals (60%), m.di. 04 mm., augite, quartz, mica, and 
glassy particles. 
Siliceous Organisms (1%), Sponge spicules. 
Fine Washings (27*66%), amorphous clayey matter with many 
minute mineral particles. 
S.S. ‘ Britannia/ No. 49, 8th November 1897. Lat. 20° 27' 12" N., 
long. 72° 40' 39" W., 2293 fathoms. 
This deposit is very peculiar, consisting of two distinct kinds of 
material : (1) a fine yellow mud or ooze with many pelagic 
Foraminifera, and (2) a green volcanic sandy mud with many 
mica flakes. 
VOLCANIC MUD, yellow and greenish, partly granular, partly 
coherent. 
Calcium Carbonate [1 9*70%), pelagic Foraminifera ( Pulvinu - 
lina menardii , tumida , and micheliniana , Candeina nitida , 
Globigerina rubra , bulloides , conglobata , dubia , and cequi- 
lateralis), bottom-living Foraminifera, Pteropod fragments, 
Tunicate spicules, coccoliths, rhabdoliths. 
Residue [80*30%], 
Minerals (50%), angular, m.di. 0‘08 mm., volcanic particles 
(green olivine being most conspicuous), mica, felspar, 
quartz, glassy particles. 
Siliceous Organisms (1%), Sponge spicules. 
Fine Washings (29*3%), amorphous clayey matter with minute 
mineral particles. 
There was also a little black vegetable matter. 
