page_0002

length in two minutes. So a "snails pace" is
30 inches an hour. I am not at all sure I am correct
as to the name of this species. Mr Lapham could
not name it, but it looks like an imperfect specimen
of M. Canaliculata given me by Dr Kirtland.
[page torn] send you a hundred specimens or so.

[page torn] did not find Lynnia ^{Paludina ponderosa} so abundant
[page torn] I have sometimes seen it in spring. There were
twenty of the melania to one of P. ponderosa. I believe
the latter is very abundant in all the tributaries of
the Illinois in this region.

Plarorbis trivolvis (I suppose it to be) but you'll know by
the specimens) is abundant in this river - it is
also very abundant in our prairie sloughs - but
I found few specimens to day and none containing
the living animal I think.

I found the empty shells of cyclas similis in
great abundance, but I think I found no living
specimens at all. this species is very abundant
in our prairie sloughs.

This summer I found Lymnea jugularis (true)
[page torn] abundance in a prairie stre small prairie
stream made of spring water. I do not
remember to have seen it in the river (into which
this stream empties) nor in the prairie sloughs
- from Dr Kirtlands observations I had supposed
it an inhabitant of stagnant water. -
However, upon second thoughts I remember
that though the creek in which I observed