746 General Notes. [ December, 
endeavored to give the entire list of mollusks then known to inhabit 
Colorado, and also all within the Great Plains on the east and the crests 
of the Sierra Nevada range on the west, these being the limits assigned 
by Mr. W. G. Binney to his “ Central Province.” “Tabulating the 
sum of the information open to me, and including my own summer's 
work, I found that one hundred and thirty-eight nominal: species had 
been recorded as occurring in this inter-montanic region. Of these 
forty-nine were also Californian species ; fifteen occurred also in the 
Eastern United States; eight hailed from the Colorado Desert; seven 
were found all over the continent, eight all over the world, and three 
belonged in the Eastern Province west of the Alleghanies only. This 
left forty-seven nominal species whose range, so far as yet known, is 
confined to the Central Province.” To this list I am now able to add 
six new names, as follows: ? Limnea lepida Gld. ? Physa inflata Lea. 
Planorbis bicarinatus Say. Goniobasis pulchella Anth. Goniobasis li- 
vescens Menke. Anodonta ? 
All of these are new not only to Colorado, but to the whole province, 
so far as I can ascertain, except Planorbis bicarinatus, which has been 
reported from the Yellowstone. It will be observed that all of these 
are Eastern forms, except the Anodon, which may turn out’ to be new, or 
related to Californian species. We very much need further collections 
from these mountainous territories, the least of which will cast some light 
upon the geographical distribution of our mollusks over the extensive 
and greatly diversified areas which they inhabit, the conditions which 
determine their being wide-spread or restricted in their range, and the 
variations which may manifest themselves in form or habit. 
Following is given a list of Mrs. Maxwell’s collection, with remarks : 
Zonites arboreus Say. Many specimens. Common in the State. 
Zonites fulvus Drap. Several specimens of this very common shell. 
Patula Cooperi W. G. B. Said to be abundant about Boulder, which 
is the first mention of its occurrence on the eastern slope of the range 
Among the large number of specimens several are marked very distinctly 
from all the rest with “ broader longitudinal and spiral patches of red- 
dish brown,” or burnt umber, as is mentioned in Binney’s original de- 
scription. They are difficult to distinguish from P. solitaria. As usual 
nearly all of the shells were found dead. The species seems to be dying 
out. : 
Patula striatella Anth. Four specimens. 
Helix pulchella Müll. Abundant. 
 Cionella subcylindrica L. A few. 
An exceedingly minute Vertigo with toothed aperture is represented 
by three specimens, but I cannot yet determine it. 
Succinea lineata W. G. B. Several specimens. 
Succinea Nuttalliana Lea, Two examples of a variety differing from 
the type mainly in having a smoother external surface. 
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