14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Sarsiella tricostata Jones (1958a, p. 49, fig. IB) has 3 medium length 

 ventral bristles on the 4th joint; only the outer 2 are annulated. On 

 each of 3 adult females from California that I examined, the inner 

 bristle is always shorter than the outer bristles and, although the 

 annulations on the inner bristle are fainter than on the outer bristles, 

 it is always annulated. 



Second antenna: exopodite with 9 joints decreasing in width distally; 

 2nd-8th joints each with 1 long stout bristle with marginal hairs; 

 9th joint with 1 medium and 1 long bristle, each with marginal hairs; 

 7th and 8th joints each with comb of short spines along distal margins; 

 endopodite 1-jointed with 1 short terminal spine and 2 proximal 

 bristles dorsally (fig. 5.^). 



Cushman (1906, p. 365) described the endopodite of S. zostericola: 

 "The secondary branch of the antenna of the female (pi. 28, fig. 17) 

 is reduced to a single joint having at the tip a stout curved claw and 

 just back from it a small pointed spine." The "stout curved claw" 

 is actually part of the sclerotized framework connecting the endo- 

 podite to the protopodite, and the "small pointed spine" observed by 

 Cushman is one of the proximal bristles. 



Mandible (figs, 5h, i) : coxale with rows of short spines along ventral 

 margin and proximally 1 short ringed medial bristle; dorsal margin 

 of basale with spine near midde and 2 short ringed subterminal 

 bristles; ventral margin with 5 subequal bristles; endopodite has 

 1st joint with 1 short terminal dorsal spine and stout curved ventral 

 claw, medial surface with short spines; 2nd joint with short terminal 

 dorsal spine and stout curved ventral claw; 3rd joint with 1 short 

 dorsal spine, 1 short ventral spine, and 1 long terminal claw, 



Cushman (1906, pi, 28: fig, 18) did not illustrate the spines and 

 bristles on the coxale of S. zostericola. He apparently overlooked 

 the small spines at the bases of the 3 claws on the endopodite and 

 medial spines on the 1st endopodite joint. On the other hand, I did 

 not observe on 3 specimens I studied the 2 short spines proximal to 

 the 5 dorsal bristles on the basale shown in Cushman's illustration. 

 Cushman (1906, p. 363, pi. 27: fig. 4) described the basale of the man- 

 dible of S. americana as having a single bristle. He may have over- 

 looked the smaller spines. Jones (1958a, p. 49, fig. ID) did not de- 

 scribe the coxale of S. tricostata and did not report the medial spines 

 on the 1st endopodite joint or the dorsal spine near the middle of the 

 basale. 



Maxilla (fig. 6a): protopodite with fringe of long hairs and 1 

 short anterior bristle; exopodite with 1 long and 2 short bristles, 

 Basale with bristle close to exopodite; endopodite has 1st joint with 

 terminal spinous alpha and beta bristles and 1 short subterminal 

 spine on anterior margin; 2nd joint with 2 slender a-bristles, 1 short 



