396 MEMOIRS OF THE CARNEGIE MUSEUM 



(luent are a proximal tubercle on the inner margin, and one between tlie two larger 

 spines first mentioned, and another just behind the base of the large spine of the 

 inner margin. 



Merojtodifc smooth, w^ith 1-3 indistinct tul)ercles near the distal end of the upper 

 margin, often entirely oljsolete. Lower side with two rows of spiniform tubercles. 

 The outer row consists of 2-6 (if only 2, they are followed l)y a few undulations 

 produced by punctures); the inner consists of (J-ll tubercles. Outer articular tulier- 

 cle with carpopodite without spine. All spines of the first pereiopods are indistinct 

 in very young specimens. 



Ischiopodite of third pereiopod hooked in the male. Hook of the male of the 

 first form strong, subconical. 



Co.TOpod/te of fourth pereiopod in the male with a prominent, blunt, and slightly 

 compressed subconical tubercle. 



Fivst pleopods of the male (Plate XXXIX, Fig. 9) similar to those of C. hartuni. 



Annuhts veniralis of the female likewise of the type of C. bartoni, but less trans- 

 verse, and the posterior margin more swollen and elevated, while the anterior is 

 hardly elevated at all, l)ut depressed. 



Size. — The largest male of the first furm at hand is from Dunbar, Fayette 

 ( 'ount}', and measures 67 mm. in length. The largest female is from ( Jliiopyle, 

 Fayette County, and measures 80 mm. in length. 



Color (Plate A, Fig. 4). — Whole body rather uniformly orntige-chrome (Ridgway, 

 1886, VII, 13) to chinese-ornnge (VII, 15), very brilliant in fresh shells, shading to 

 orange-ntfons (VII, 12) and crcu'in-color (VI, 20) on the sides. Color most intense 

 on anterior pavt of carapace and on the claws. Abdomen ordiigr-chrome, shading to 

 salnio'ii-color (VII, 17) or fcrrugiiicovs (lY, 10), or odivaccous-hnff (V, 13). (Jhelfe 

 varying from o/'<n/yr-rA/'07rtr to .s7//(/ /•;/-;■('/ (VII, I'i). Legs chincsc-onvngc to solinov- 

 eolnr and fcrrngineous. (Jften a brown or Ijlackish coat of mud covers a gi'eat part 

 of the body, obscuring the colors. The t-olor of young s[)ecimens is semitransparent, 

 with more or less red prevailing, but the rostrum and chehe are always distinctly 

 red. Color of eggs salvion (VII, 17) to salmon-huff (IV, 19). 



There are one hundred and thirty-eight specimens in the ( 'arnegie Museum ; 



ninety-three from Pennsylvania, thirty-six from West Virginia, and nine from 



Maryland. 



DISTRIBUTION. 



LOCALITIES REPRESENTED IN THE CARNEGIE MUSEUM. 

 Pennsylvania: Weslmorcland Count g. Jones Mills; Faijdte Con nig, Dunbar; In- 

 dian Creek; Rainier Park, Ohiopyle ; ISovicrset Count g. Windber; Listie ; Rock- 

 wood ; Myersdale. 



