18 
E. B. Wilson — Pycnogonida of New England. 
are armed along their opposable margins with a series of small 
spines, which are much more numerous and more erect upon the 
dactylus. 
Palpi much longer than the rostrum ; basal joint stout, very short ; 
second and third much longer, nearly equal ; fourth and fifth a little 
less and more slender, sparsely hairy. 
Accessory legs stout, slightly hairy; the three basal joints are 
nearly as broad a*s long; the following three are much longer, the 
sixth shortest and about as long as the three basal joints united ; the 
remaining joints are much shorter and more slender, the terminal one 
acute and claw-like, with a row of spines on the inferior edge ; the 
denticulated spines vary considerably and are sometimes nearly 
smooth. 
Legs very long and slender ; first and third joints short, about half 
the second ; the three following are very long, sixth longest, fifth 
shortest ; propodus and tarsus slender, nearly equal, hairy ; the 
former is not armed with spines; dactylus long and slender, very 
acute, about three-fifths the length of the propodus; auxiliary claws 
very small, about one-fifth the dactylus. Color, when living, light 
salmon-yellow, the legs often annulated with broad reddish rings, bigg 
masses large, two to four in number, bright yellow. Length of larg- 
est specimens 15 millimeters ; extent 140 millimeters ; accessory legs 
19 millimeters. 
This fine species is not uncommon in deep water, attaining its 
greatest size on muddy bottoms, though occurring also on hard 
bottoms. Taken by the U. S. Fish Commission off Casco Bay, 73 to 
82 fathoms ; off Salem, Mass., 35 to 90 fathoms, mud, etc. ; Le Have 
Bank, 59 fathoms, pebbles ; off Halifax, 50 fathoms, mud, gravel and 
rocks ; Bedford Basin, soft mud. Dredged by Dr. Packard and Mr. 
Cooke in 52 to 90 fathoms, rocks, south of Cashe’s Ledge, and in 78 
fathoms off' the Isles of Shoals. Also taken at Eastport in 1870, by 
Professor Verrill; and by Mr. Whiteaves in the Gulf of St. Lawrence. 
In young specimens the legs are hairy, the auxiliary claws are much 
larger and the antennae are extremely slender and delicate. 
Heller’s Nymphon gracilipes is very close to, if not identical with, 
this species. In his figure, however, the dactylus is represented as 
very nearly equalling the propodus, and it may be distinct. 
