234 University of California Publications in Zoology. [Vol.4 



which is concaved, margin with a few setae ; carpus equal in 

 length to the ischium, irregularly pear-shaped, the base one-third 

 as wide as the apex of the merus, bearing two rows each of about 

 six curved stout spines, the margins with a few setae; propodus 

 as long as the merus, five and one-half times as long as broad, 

 distinctly arced, the hind margin with a few minute setae and 

 two small teeth at apex; dactyl simple, rather stout, scarcely more 

 than a third as long as the propodus. 



Fifth peraeopod (pi. 10, fig. 17) nearly twice the length of 

 the third, slender; the basal joint stout, a little longer than the 

 succeeding two united, half as broad as long, fringed on both 

 margins with sparse setae, from half to three-fourths as long as 

 the segment; ischium slightly longer than broad, a few setae on 

 the outer margin ; merus more than twice as long as the ischium, 

 one-third as broad as long, not widened at apex, both margins of 

 this and of the succeeding segments armed with groups of long 

 setae ; carpus oblong, twice as long as the ischium and more than 

 three times as long as broad, the base about equal to the width of 

 the apex of the merus ; propodus one-half longer than the merus, 

 over eight times as long as broad, scarcely arced, with two minute 

 teeth at apex within ; dactyl simple, a little more than one-third 

 as long as the propodus. 



First uropods (pi. 10, fig. 19) extending beyond the others; 

 ramr-half the length of the peduncle, the latter fringed on the 

 outer side with setae, a short spine on either side at apex, outer 

 ramus with a long terminal spine, and with its outer edge bear- 

 ing about twelve spines; inner ramus bearing three terminal 

 spines, its inner edge bearing seven spines. Peduncle of the 

 second uropod twice as broad as long, one-third as long again as 

 its inner ramus; this slender, bearing a long and a short apical 

 spine, and one at the middle of the inner margin ; the outer ramus 

 broader, truncate, with a terminal spine, and a few setae along 

 the outer margin. Peduncle of third uropod quadrate, ramus 

 ovate, one and one-half times as long as broad, the margins fur- 

 nished with long setae. 



In alcoholic specimens the ground coloi- is yellow, the antennae 

 and face above marked with brown, and there is a brown band on 

 the base of each dorsal segment. 



