100 B. IV. Kunkel, 



provided with short setae on inner margins and apex ; third uropods 

 with short conical rami armed apically with hook-Uke spines, ex- 

 tending beyond other uropods. 



Telson small, entire, thick, subtriangular, about as long as broad. 



In the alcoholic specimens represented in the collection by 2 

 males and 2 females, the epimera, terga, and proximal joints of the 

 antennae and uropods were marked with irregular spots of a dark 

 flesh color. Length of males, 10 mm.; of females, 18 mm. 



Ericthonius braziliensis (Dana, 1853) Stebbing, 1906. 



1853. J. D. Dana, Pyctilns braziliensis. U. S. Explor. Exped., 



vol. 13 II, p. 976; pi. 67, fig 5. 



1906. Stebbing, Ericthonius braziliensis. Das Tierreich, Lief 21, 



p. 671. 



Eyes compound, with ocelli very closely crowded together, situated 

 on basal portion of very prominent interantennal lobes. 



Antennae subequal and more than half as long as body. 



Mandibles with all parts well developed ; palp stout, 3-jointed ; 

 first joint broader than long, narrower at base than apically ; second 

 joint longer and stouter than first, armed with long slender 

 setae on inner margin ; third joint nearly 8 times as long as broad, 

 with rounded apex, armed with setae along inner margin, more 

 numerous on distal half and apex, outer margin with fascicles of 

 setae at middle ; cutting edge short, divided into 4 or 5 teeth, of 

 which the second is the largest; secondary cutting plate expanded 

 distally and cutting edge ver}^ oblique, composed of 4 rather sharply 

 pointed teeth, diminishing in size from the anterior one ; 5 plumose 

 spines on spine row ; molar tubercle moderatel}' large. Lower lip 

 with outer plates having anterior margin entire, inner plates mod- 

 erately developed. First maxillae with inner plate small, triangular, 

 with 2 setae on inner margin ; outer plate moderately broad, taper- 

 ing slightl}-, with 7 forked spine teeth on distal margin; palp 2- 

 jomted, curved ; first joint broader than long : second about as long 

 as wide with apex truncate, armed with 4 stout setae and several 

 smaller ones. Second maxillae with broad plates rounded distally ; 

 outer plate longer than inner one and with setae on apex ; inner plate 

 with spines on apex and diagonally on surface. Maxillipeds with 

 long, 4-jointed palp ; fourth joint cylindrical, about twice as long 

 as broad, with 4 apical setae, of which the 2 outer are longer than 

 segment ; third joint stout, twice as long as broad with numerous 

 long setae on distal portion ; second joint broader and longer than 

 third and armed with long setae on inner margin ; first joint slightlX 



