x NOTICE. 
plete than had been anticipated, very few descriptions 
having been finished except in the genus Helix, and 
none of the generic descriptions except those of the 
Limacidne. Many new species have also been added 
from the collections which he had caused to be made 
in the South-western States and Texas, but which 
his health had not permitted him to examine. The 
passages for which I am responsible are indicated 
by the annexation of the letter " g." A number of the 
plates also remained to be designed or engraved. It 
was the intention to have had the work issued very soon 
after the decease of Dr. Binney ; but the scattered state 
of the materials, at various places in this country and in 
Europe, and the difficulty of procuring suitable artists, 
have caused most perplexing delays. 
I cannot hope to have produced the work such as he 
would have made it. My comparative ignorance of a 
subject to which he had given so much of the attention of 
a mind deeply in love with his subject, and thoroughly 
prepared for a full and philosophical treatment of it, 
would forbid this. Nor can I pride myself on possessing 
that delicate artistical taste with which he was so well 
endowed, and which is so necessary in the details of 
such a publication. But so far as a general knowledge 
of his design, together with a sincere wish to do justice 
to the memory of a friend, could avail, they have been 
given to the work. 
A. A. GOULD. 
Boston, 1850. 
