Birds and Nature Vol. 09 No. 4 [April 1901]Various
History
Birds and Nature Vol. 09 No. 4 [April 1901]
Various
Birds -- Periodicals; Natural history -- Periodicals
Look closer, as the angels can,
And you will see the fairy work—
The ruby specks, the azure veins,
That in the tiniest hollow lurk.
—Walter Thornbury, “Shells.”
SNAILS OF THE OCEAN.
Many of my readers have doubtless spent some of the vacation months at
the sea shore and have wandered over the beach at low tide picking up
shells and other objects left by the receding ocean. They have also, I
am sure, peered into the little pools of water left on the beach and
have watched with interest the captives imprisoned therein, hermit
crabs, fiddler crabs, sea anemones, sea worms and snail shells. It is
with the latter that the present article will deal.
The stretch of beach which is uncovered twice a day by the receding of
the water is called “between tides,” and is inhabited by a host of
animate creatures, chief among which are the mollusks. The marine snails
outnumber all of those which we discussed in the last article, and their
shells are far more beautiful, those found in the tropics having the
most gaudy colors imaginable. The animals are formed on the same plan as
those of the fresh-water snails, although each family has some
peculiarity not shared by its relatives. All live in the water and
breathe air through that medium by means of gills, similar to the second
class of fresh water snails mentioned in the last number. They are found
in all parts of the world, those of the tropics, however, being the most
brilliantly colored. While the majority of species live either between
tides or near low water, there are not a few which live in the abysses
of the ocean, and have been dredged from the bottom of the sea at a
depth of two thousand, seven hundred and forty fathoms, or, to put it
more plainly, over three miles. The average depth at which mollusks are
found in any number is about one thousand fathoms. The variability of
marine snails is so great that we shall be able to call attention to but
a limited number of typical forms.
Among the best known of the marine snails are the Tritons, a family of
mollusks living in tropical seas. Their shells are generally large and
highly-colored and variously ornamented with short spines and knobs. One
species, the Triton tritonis, is among the largest of mollusks,
measuring eighteen inches in length. One of the smaller Tritons is
pictured on the plate. Another shell familiar to those who have visited
Florida is the Fasciolaria or banded snail, which attains a length of
three inches and is very prettily banded and dashed with color. A near
relative of this species is the giant banded shell (Fasciolaria
gigantea), which is the largest of all marine snails, growing to a
length of nearly two feet. This species is found plentifully on the
southern Atlantic coast of the United States, being particularly
abundant about the coral reefs of the Florida Keys.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account