THE CRUSTACEA OE NEW JERSEY. 335 



with short peduncle, not extending forward far as that of ex- 

 ternal antennae, and with two subequal flagellae not quite equal 

 to one and one-half rostral lengths, if latter measured from hind 

 edge of orbital socket. External antennae with peduncle almost 

 cylindrical, and very long flagellum depressible back very 

 slightly beyond end of telson. Eyes rounded, their diameter less 

 than that of stalk. Abdomen partly cylindrical, segments 

 smooth, and terminate on each side in strong triangular flat 

 plate. Tail quite broad, outer plates well divided about outer 

 fourth, and two strong denticles at common base of two outer 

 lamina. Anterior legs greatly enlarged, unequal in size and 

 dissimilar in shape, much larger than other legs. Very strong 

 tubercles on chelipeds of first legs along inner edge, also several 

 on carpus. Other legs weak, second and third pairs weakly 

 chelate and fourth and fifth pairs with simple dactyls. 



Color very variable. R. Rathbun says it is generally yellow or 

 yellowish-red, with spots or mottlings of green, rarely blue. 

 Mottlings most numerous and dense dorsally, while sides and 

 lower surfaces of claws with yellow predominating. Along 

 lower edge of carapace each side broad band of blue or bluish 

 also extends short distance up hind edge of carapace. Just above 

 this band yellow begins, where uniform or immediately varie- 

 gated Avith dark blotches. Green color often replaced by blue 

 shades. Sometimes entire carapace reddish. Rostrum olive- 

 green, its spines deep rich red. Abdomen with markings cor- 

 responding to carapace. Distinct line down back of carapace 

 usually dark green. Tail-flaps edged posteriorly by dark olive- 

 brown band. Upper surface of anterior large claws reddish or 

 orange shade, deeper towards ends where very bright red, fading 

 whitish at tips. Over this general color outer edge of claw with 

 broad dark olive-brown or black banding, and numerous large 

 spots of same color cover more or less of remaining surface. 

 Under surface of these claws mostly always of variable orange 

 tints, terminal joints more intense than inner ones, which more 

 or less marked with green or blue. Other legs much lighter 

 below than large claws, with green or blue markings, especially 

 above and at ends of joints. Tips end in deep orange-red, while 



