Botany and Zoology. 133 
ticipated from the fact that many burrowing annelids, crustacea, 
and shells, which are rarely if ever exposed to the light, are bril- 
liantly colored, 
Therefore the presence of color-markings on fossil shells is not 
' an evidence of their shallow-water origin, as believed by Forbes 
and others. The finely colored specimens of Voluta Junonia, 
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oe The enerally Pipa ried that the temperature of the 
Water at great depths i everywhere the same, in all latitudes, viz: 
that at which aca wats has its ifteabon density, formerly said by 
Herschel and others to be 39°, but more recently shown to be that 
of the freezing g point of sea-water (25°°4 to 27°°4 Fahr.), is not true, 
- Tage for depths down to 700 fathoms, as shown by the observa- 
- of Thomson ssi peace . 
: “b “The ¢ same observ 
fusorial mud. e last fauna, ‘or at least some of its species, ex- 
tends over a region of vast extent, both in latitude and longitude 
Some of the from Florida t Pe jess the Aretic 
nee z 
a living representative of the “ Rugosa” group of co s, up 
b Jeffre = Lacuna tenelia and 
* Other re: markable instances are mentioned oy ys: ee pea ingeees 
_ astalk-eyed crab from 808 fathoms; us 
from 1230 als % iz stalk-eye crustacean | re 476 — a large athe Fu- 
from 1207 f athoms; . sa tuncian aa a Octopus coceo 
+ The P f which are said to have well developed cig “ 
; oreupine ex expedition obtained a number speci 
es om only y from the Tertiary (Coralline Crag and Red Cra 2). 
* 
shells previously 
