THE CRUSTACEA OF NEW JERSEY. 359 



First perseopods very elongate, rather slender, in males. Hand 

 long, slightly compressed, surface punctate, slender. Inner palm 

 edge a little less than fingers, nearly straight, with row of small 

 wide-set and inconspicuous tubercles. Outer palm edge smooth, 

 rounded, not carinated. Fingers about equal palm in length, 

 their edges almost entirely approximated. Fingers punctate over 

 surfaces, sometimes slightly hairy towards ends. Fingers with 

 slight tooth usually at each tip and several similar teeth scattered 

 along edges, which more or less finely setaceous. Ridges or 

 grooves usually obsolete on fingers. Carpus nearly twice as long 

 as wide, shorter than palm, sometimes rather deep longitudinal 

 groove above, obsolete in males, and inner edge with strong 

 hooked spine directed slightly forward. Sometimes another 

 spine at upper front edge of carpus and one or several on lower 

 front edge. Lower surface of carpus more or less tubercular. 

 Merus mostly smooth, with two spines on upper edge anteriorly, 

 and lower edge with two rather regular rows of small tubercle- 

 like spines, these gradually smaller posteriorly. Ischium of third 

 and fourth peraeopods hooked in male. 



First pleopods in male moderately long, reach hind edge of 

 coxa of third peraeopods, without basal articulations, formed of 

 two subequal joints, curved sharply forward to form into right 

 angle with basal portion, not twisted. Outer part compressed 

 falciform, end pointed, with small posterior accessory tooth or 

 point. Annulus ventralis of female transversely rhomboid. 



Color usually olivaceous, paler below and on ends of feet. 

 Length 90 mm. 



Remarks. — This species ranges along the Atlantic Coastal 

 Plain northwards to New Jersey at least, and New York. South- 

 ward its distribution is given as Georgia, according to Faxon, 

 and it seems to have been of southern or Carolinian origin. 

 Blanding's crawfish lives in still water, often in the masses of 

 aquatic vegetation of our lowlands. , It loves sluggish waters,, 

 often near the sea, or in muddy and grassy ditches, and is even 

 said to be able to live in salt water. 



In New Jersey I have obtained it in tributaries of Crosswicks 

 Creek near Trenton, Repaupo Creek near Repaupo, and ^lantua 



