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. -184 PDF (2.0 MB)
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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