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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 180

180     Wisconsib Academy of Sciences, Arts, and Letters.
  II.- Dorsal areola none. C. ol)esus.
  Cambarus acutus (Girard) has been found in Racine county by
Dr. Hoy. It occurs also in marsh ditches near Sauk City in com-
pany with C. obesus.
  C. stygus (Bundy). Bulletin No. 1, Ill. Mus. Nat. list., 1876.
  A number of small crawfish were sent me by Dr. P. R. Hoy,
by whom they were found on the shore of Lake Michigan at
Racine, having been washed ashore during a storm. Proving to
be a new species, they were described under the above name.
The rostrum is long and pointed, smooth above, foveolate at base;
cephalothorax slightly compressed, smooth or slightly punctate
above and finely granulate on sides. The dorsal area is narrow
and the lateral spines acute, antennal plates wide, truncate, with
short apical teeth; epistoma rounded in front, twice as wide as
long; third maxillipedes hairy on inner and lower sides; hands
short, smooth, serrate on inner margins, fingers short, near
straight, ribbed and punctate above, with contiguous margins t
berculate, outer one hairy; third segment of third (and probab
fourth) thoracic legs of male hooked. (The specimens were
badly mutilated during the transfer through the mail that I cou
not determine this point, not one of the three males sent me ha
ing the fourth legs remaining.)  The first abdominal legs of ma
are short, truncate, with three short obtuse teeth directed ox
ward from posterior margins of apex, leaving a smooth groo
passing up on outer surface between these teeth and the anteri
margin. The ventral ring of female is flat, transversely elliptic,
with posterior margin slightly elevated.  This species resembl
C. acutus, but can be instantly separated by the short hands ai
non-tuberculate annulus of female. The color of these spe,
mens when caught was a dark cream, darker along sutures.
alcohol they changed to a purplish black, not confined to t
exoskeleton, but extending to the adjacent soft tissues.
  C. viriles (Hagen) is our most abundant species. It will doul
less be found in all the streams of the state.
   A male in my collection, taken on a fisherman's net at Jeff,
son, belongs to Hagen's variety A. It is the largest crawfisl
have seen, measuring 61 inches from  tin of telon to that of r,

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