400 MEMOIRS OF THE CARNEGIE MUSEUM 
hand and carpopodite pale vinaceous-pink (lighter than IV, 21). Basal joints of 
antenne cyanine-blue; flagellum annulated dahlha-purple (VIII, 2) and very pale 
lilac (lighter than VIII, 19). Pereiopods pale-blue, upper edges shading to china-blue, 
near the bases white. Lower side of body whitish, on the abdomen suffused with 
china-blue and pale-blue. 
These brilliant colors fade more or less in old specimens, but the marine-blue 
always remains the ground-color. A brownish or blackish deposit of mud often 
obscures the colors, and such specimens often appear blackish-blue all over. 
Young individuals are semitransparent, with a distinct pale-blue hue on the 
abdomen and chele, and heliotrope-purple (VIII, 18) on the carapace. 
Distinct color varieties are rare, and the few observed will be mentioned below. 
The color of the newly laid eggs is hazel (LV, 12) or ochraceous (V, 7); later on 
they are vinaceous-buff (V, 15) on one side, pinkish-white on the other. 
The Carnegie Museum possesses two hundred and seventy-nine specimens of this 
species, two hundred and thirty-six of which are from Pennsylvania, and forty-three 
from West Virginia. 
DISTRIBUTION. 
LOCALITIES REPRESENTED IN THE CARNEGIE MUSEUM. 
PreNNsYLVANIA: Westmoreland County, Hill, (opposite Leechburg); Braeburn ; 
Dundale; Jeanette; Allegheny County, south of Logan’s Ferry, (C. V. Hartman 
coll.) ; Hulton, (R. Dornberger coll.) ; Wilkinsburg, (D. A. Atkinson coll.) ; Edge- 
wood Park, (type locality); Nine-Mile Run, Pittsburgh ; Fern-Hollow, Pittsburgh ; 
Schenley Park, Pittsburgh ; Squaw-Run, near Aspinwall, (D. A. Atkinson) ; North 
Versailles Township, (opposite Stewart); Jack’s Run and Long Run, South Ver- 
sailles Township ; Boston, (D. A. Atkinson); Thompson’s Run, Kennywood, (F. E. 
Kelley coll.); Carnegie, (D. A. Atkinson); Moon Township, (A. T. Shafer coll.) ; 
Lashell’s Hollow, Moon Township: Beaver County, Doctor Heights, Monaca ; Wash- 
ington County, Francis Mine near Burgettstown ; Taylorstown; Monongahela City ; 
West Brownsville; Hayette County, Smithfield; Cheat Haven; Greene County, Deer 
Lick. 
West Vireinia: Hancock County, Congo; Hollidays Cove; Brooke County, Col- 
liers; Ohio County, Elm Grove; Marshall County, Cameron; Nuss; Monongalia 
County, Morgantown. 
PREVIOUS RECORDS. 
The only previous records are those given by Williamson (as C. dubius), 
Schenley Park and Fern Hollow, Pittsburgh, and Moon Township, Allegheny 
County. 
