PYCNOGONID.V OF NEW ENGLAND AND ADJACENT WATERS. 473 



Specimens examined. 



AcHELiA Hodge. 



Body broad. Antenuoe small, two-joiuted, not chelate, 

 jointed. Accessory legs ten-jointed, present in both sexes. 

 dactylus with auxiliary claws. 



Palpi ."ight- 

 Legs stout; 



Achelia spinosa (Stimp.) Wilson. 



Trans. Conn. Acad., vol. v, p. 7, \}\. ii, figs, la to Ih, Aug., 1878. 

 Zetes sjiinosa Stimpson, Invertebrata of Grand Mauan, j>. 37, 1853. 



Plate I, Figure 4 ; Plate II, Figure 8. 



Body nearly orbicular, deeply incised, segments not apparent. Lat- 

 eral processes separated by a distinct interval. Neck distinct, but very 

 broad. Oculiferous tubercle large and prominent, acute. Eyes ovate, 

 black. Abdomen very long and slender, bifid at the tip. 



Eostrum large, thickest in the middle and tapering to both ends, 

 truncated at the extremity. 



Antennae not quite half the rostrum. The basal joint is about four 

 times as long as broad, somewhat swollen near the extremity, where 

 there are two or three tubercles, each terminated by a stout hair. 

 Second joint rounded and knob-like, with one or two hairs. 



Palpi slightly longer than the rostrum ; the first, third, and four 

 outer joints are very short, the first somewhat swollen ; the second and 

 fourth are much longer and nearly equal ; all but the basal joint are 

 hairy, the four outer ones only on the exterior margin. 



Accessory legs in the male rather large. The two basal joints are 

 short and stout, followed by three longer and more slender ones. The 

 remaining five are much shorter, the terminal one very small and nearly 

 globular ; it bears two very large flattened denticulated spines ; each of 

 the two iH'eceding joints has a similar spine; theouter joints are sparsely 

 -hairy, most of the hairs pointing backward. In the female this append- 

 age is much smaller and proportionally stouter; the two basal and five 

 distal joints arc nearly as in the male, but the third, fourth, and fifth are 

 much shorter and stouter. 



