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Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume V (1877-1881)

Bundy, Will F.
A list of the crustacea of Wisconsin,   pp. [177]-184 PDF (2.0 MB)


Page 183


              A List of the Crustacea of Wisconsin.        183
  Dr. IHoy found it burrowing in low grounds on the prairies,
emerging from its holes at nightfall and after rains.
  C. obesus (ilagen).
  This is one of our largest and most abundant crawfish. Unlike
most other species, it prefers stagnant water, frequenting ponds
and meadow ditches, often wandering far from bodies of surface
water, burrowing in wet fields and swales.
  It is pre eminently our burrowing species, sometimes extending
its hole to considerable depths. I once followed a burrow twelve
feet without unearthing its occupant or reaching the bottom of
the hole.
  This species is easily identified. The rostrum is short, tooth-
less, depressed, concave above; areola wanting; first abdominal
legs of male bifid, with two short, thick, abruptly recurved teeth.
  The annulus of female is transversely elliptical, symmetrical,
anterior and posterior margins bituberculate; fossa 8 shaped, con-
stricted in middle by anterior and posterier tubercles; lateral
angles rounded.
  C. bartonii. (Erichson.)
  I do not think this species has been found in the interior of the
state. It occurs in Lake Superior.
  It is similar to C. obesus. The rostrum is not so much de-
pressed, is less excavated above and the areola is very wide.
  The female annulus has the posterior border elevated and the
lateral angles acute.
  iljysas relicta. (Loven.)
  This occurs in the Great'Lak-es.  It has not been found in the
interior waters of the state.
  Orchestes dentatus. (Smith.)
  With the exception of Gainmnarus fasciatus this is the most
abundant species in the interior waters of the state.
  Pontoporeia hoyzi. (Smith.)
  P. filicornas. (Smith.)
  Both of these species inhabit the deep waters of Lake Michigan.
They have never been found in the interior waters of the state,
but their occurrence in the deeper lakes is probable.
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