on THE HALL OF SHELLS. 
now consigned to animal kingdom. Have been variously 
classified, and the old classifications abandoned or giving 
place to those relating more particularly to structure and 
development. 
Alge draw their sustenance from the water, loving 
best the quiet seas of temperate zones, and depending 
upon light for their coloring. Find authority for the 
story in studies upon the ancient art of Venetian point 
lace. 
To secure and preserve the most delicate varieties of 
seaweed, slip a paper under them while floating in the sea 
ora dish of water, raise carefully, arranging any imper- 
fect points with fine camel’s-hair brush or the point of a 
pin. Kelp must be pressed between oiled paper or pieces 
of muslin on account of the glue it contains. A gatherer 
of seaweeds when questioned regarding many varieties 
replied, ““Oh, nobody knows!” Here, then, is a realm 
waiting and luring investigation. 
CHAPTER X.—Argonaut and nautilus—both cephalo- 
pods—are quite unlike in many points, yet their names 
have been indiscriminately used. There is a similarity in 
the form of their shells; that of the argonaut is, however, 
thin and {brittle, while the shell of the nautilus is thick 
and strong. This latter is divided into chambers, hence 
called the chambered nautilus. It is interesting to study 
the fossil species of these shells. 
CHAPTER XI.—The family Veneride contains many 
beauties long ago dedicated to Venus. Varieties of these 
shells are numerous, but all more or less beautifully seulp- 
tured and pictured. The value the aborigines attached to 
the round clam of the Atlantic coast has been preserved 
in its name Venus mercenaria. Clams may be studied in 
salt and fresh waters, the number and character of the 
teeth in their hinges observed. ‘The nervous system can 
be, with care and patience, worked out in the clam or 
fresh water mussel.” 
The family Chitonide are curiously constructed, en- 
