J. Murray on Sea-bottom Deposits. 267 
sandy particles, ranning over their surfaces. These belong to 
a Rhizopodal organism. The sarcode which fills these tubes 
contains many large brown pigment-cells, and small bioplasts 
are collected in clumps at distances along the length of the 
tube, or are scattered throughout it. 
ubes of a similar nature, but composed of pieces of Globi- 
gerina, Radiolaria, ete., would appear to be rather abundant on 
some of the oozes, and to run irregularly over the bottom. 
_ In the clays we always get some arenaceous forms of Foram- 
inifera when there has been a successful haul with the trawl. 
Their shells are made up of pieces of manganese, clay, and small 
mineral particles, and they contain the same kind of sarcodic 
substance as the tubes above referred to. 
ent precipitated with different quantities of spirit and when 
treated with coloring solutions. ‘The precipitate was also ex- 
amined alone and mixed up with some of the ooze. The ooze 
Was examined at the same time, and in the same a 
without having been treated with spirit. The results were 
briefly these : rae 
(2.) When sea-water is treated with twice its volumes spirit 
th less, nearly the whole of the amorphous precipit assumes 
-“€ crystalline form in a short time. f 
f 
* See a paragraph from Mr. Buchanan's report on the — page. 
“ 
a 
