THE CRUSTACEA OF NEW JERSEY. 347 



Color usually little varied, greener in young and browner in 

 old exanii)les. Carapace and abdomen olive-green to tawny-olive, 

 chestnut and burnt-umber. Edges of rostrum in browner ex- 

 amples ferruginous. Distal third of fingers rufous or tawny. 

 Tubercles of cutting-edges of fingers ochraceous-buff, and in 

 brown examples usually some green on chelae. Length 90 mm. 



Rcnuirks. — This species ranges from Canada in New Bruns- 

 wick and Quebec southward to North Carolina, Tennessee, Ken- 

 tucky and southern Indiana. Westward it is represented by 

 the allied Cainbarus bartonii robustus (Girard). The present 

 species does not appear to be a feature of the Atlantic Coastal 

 Plain. According to Ortmann, also from whom the above 

 description is somewhat elaborated, it is a mountain-loving 

 species, where it lives in the rough, rocky highland streams or 

 brooks, and is usually absent from the large river-basins. It 

 is sometimes found in the uppennost waters of tlie brook, the 

 very headwaters, or even in springs, where it lives under stones 

 or often in burrows. These latter are holes frequently a foot 

 or over in depth, and are made along the banks, the aperture 

 often above water. Accordingly as the weather may be wet 

 or dry the burrows are of less or greater depth, and in the 

 latter case the so-called "chimneys" are found, at times ecjualling 

 those of the typical chimney-building crawfishes. It is also fre- 

 quently found associated with other species of crawfishes. In 

 large rivers it occurs usually at the mouths of small streams 

 or at places where springs may occur along the banks. 



Air. W. T. Davis writes that it is "still to be found in some of 

 the Staten Island brooks. I kept one in an aquarium for some 

 time, and he made a burrow for himself in the sand, etc., about 

 the roots of a small pond-lily. I noticed him coming out of the 

 burrow every now and then, always laden with an armful of 

 small pebbles, which he deposited at a short distance. He would 

 hold his two claws against his body and thus managed to carry 

 a good deal of material. As he came out of the burrow, he al- 

 ways stopped and looked about before going to a distance. When 

 I ran water into the aquarium the crawfish would place himself 

 at the mouth of the hose so as to receive the stream of fresh wa- 



