E. B. Wilson — Pycnogonida of New England. 
13 
alcohol. Posterior segment much smaller than that preceding. 
Abdomen small, rounded at tip. 
Rostrum rather short and stout, slightly constricted a short dis- 
tance from the extremity. 
Antennae stout, almost destitute of hairs. Claws of the chelae very 
strongly curved, quite smooth on the opposable margins ; the dacty- 
lus projects somewhat beyond the extremity of the preceding joint, 
and is very thick and strong. 
Accessory legs nearly one-third as long as the legs; basal joint 
much stouter than the others ; third joint longest ; terminal joint 
strongly curved, smoothly rounded at the tip, armed on each side with 
six or eight simple spines directed backward, and below, with three 
or four stouter ones ; the other joints bear a few scattered hairs. 
Legs comparatively stout, remarkably smooth in appearance, though 
bearing a very few scattered hairs ; basal joint nearly quadrate, about 
half the length of the second, which is somewhat longer than the third ; 
the three following are nearly equal and longer than the three basal 
joints united ; propodus stout and curved, about four times the tarsus ; 
on its inferior margin are five stout spines followed by a series of very 
small ones ; dactylus stout, more than half the propodus ; auxiliary 
claws small, not one-fourth as long as the dactylus. 
Color blackish or sepia. Length 4-75 millimeters; extent 29 
millimeters. 
The Phoxichilidium femoratum of Europe resembles this species, but 
differs in color and in the shape and armature of the propodus and 
dactylus, besides being less robust. P. maxillare is very common in 
the Bay of Fundy, at low' water mark, under stones, numbers of them 
often being united in a tangled mass. It occurs also in Casco Bay, 
but has not been found farther south. A single young specimen was 
takeu at Halifax on a hydroid growing on one of the wharves. 
Phoxichilidium minor, sp. nov. 
Plate IV, figures 2 a to 2 f 
Much smaller than P. maxillare , to which it is closely allied. 
IJody more slender, surface nearly smooth. 
Rostrum short and stout, slightly tapering, smoothly rounded at 
the extremity, not constricted. Antennae more slender, dactylus 
slender and not so much curved as in P. maxillare. 
Accessory legs with the spines scattered and not arranged in 
definite series on the last joint; inferior margin of the terminal joint 
sometimes without spines. 
Legs slender, sparsely hairy; tarsus deeply emarginate ; propodus 
