HAUSTORIIDAE OF NEW ENGLAND — BOUSFIELD 195 



Peraeopod 1: posterior coxal angle acute, richly plumose; segment 

 2 very broad and strong, plumose distally behind; segment 4 convex 

 margins plumose; segment 5: posterior lobe small, circlet of about 18 

 slender spines and 8 plumes; spatulate segment 6 with 11 spines 

 and 9 plumose setae. Peraeopod 2: coxal plate very deep, with deep 

 posterodistal margin deeply incised, posterior process acute; segment 



2 stout, plumose behind ; segment 4 short and powerful, convex margins 

 plumose; segment 5 lobe short, circlet of about 10 slender spines and 

 9 setae, segment 6 with 1 1 spines and 8 setae. 



Peraeopod 3: posterior coxal lobe expanded above and below, 

 lower margin lightly setose; segment 3 orbicular, posterior margin 

 strongly plumose; segment 4: proximal border of posterior lobe 

 incised near base, 2 groups of spines on posterior margin; segment 5 

 nearly as broad as 4, 2 groups of long posterior spines; segment 6 

 longer than width of 5, marginal spines long. Peraeopod 4: coxa 

 broad, slightly expanded above and below; segment 2 much broader 

 than deep, posterior border plumose proximally; segment 4 much 

 longer than wide, 3 rows of facial spines in fanwise clusters of 5-8 

 spines; segment 5 subquadrate, anterior margin convex, extending 

 well forward of border of 4 ; segment 6 moderately long, subspatulate, 

 6 clusters of posterior and terminal spines. Peraeopod 5: coxa 

 moderately deep, broadly acmninate and lightly setose behind; 

 segment 2 very broad, smooth behind; segment 4: posterior lobe 

 elongate, subacute, distal border very short, with 1 spine group; 

 segment 5 slightly expanded, posterior border short, with 1 spine 

 group ; segment 6 slightly shorter, with 4-5 marginal spine groups and 



3 small lateral clusters. 



Pleosome side plate 3 deep, convex below, posterior tooth strong; 

 5-6 groups of lateral plumes setae, up to 10 per cluster. Pleopod 

 peduncles very short and broad; outer ramus 18-segmented, slightly 

 longer than 15-segmented inner ramus. Uropod 1: peduncle slender, 

 weakly spinose; mner ramus with about 3 posterodistal clusters of 

 setae, terminal spines slender; outer ramus slightly shorter, terminal 

 circlet with slender spines and a long seta. Uropod 2: rami subequal, 

 richly setose; stout peduncle with row of slender spines and distal 

 cluster of plumose setae. Uropod 3 shorter than 2, rami broad, 

 subequal, slightly longer than peduncle; terminal segment of outer 

 ramus more than % the proximal segment; apex with spines and setae. 

 Telson very broad, posterior margin almost straight, lobes each with 

 11 stiff slender setae; 2 lateral clusters of setae. 



Female, 7.0 mm.: Externally similar to male. Brood plate on 

 gnathopod 2 long and slender, somewhat broader on peraeopods 1 

 and 2, vestigial on peraeopod 3. 



