of the Pacific Shores of North America. 463 



lateral margin convex and well rounded, with nine teeth, 

 the inner one forming the outer angle of the orbit ; teeth 

 deeply separated, their edges denticulated, their apices 

 curving forward and very sharp, almost uncinate. Postero- 

 lateral margin with a deep emargination near the extremity, 

 forming a sharp tooth, and another, rather slight, a short 

 distance within the first. These emarginations are much 

 deeper in the young than in the adult. Front sufficiently 

 broad, but not projecting farther forward than the exterior 

 angle of the orbit ; inter-ante nnary portion with three well- 

 separated teeth, the middle one being smaller and rather 

 below the lateral ones ; praeorbital tooth rather prominent. 

 External antennae very large and hairy, in length equalling 

 two fifths that of the carapax ; apex of basal article pro- 

 jecting considerably beyond the praeorbital tooth. Third 

 article of external maxillipeds subquadrate, a little longer 

 than broad ; anterior margin nearly transverse, ciliate with 

 long hairs; angles rounded; notch for insertion of fourth 

 article deep, abrupt below, continuous with the margin 

 above. The slight ridge on the palate parallel with its 

 inner margin is more sharply prominent in this than in any 

 other species. Feet of the first pair large, particularly in 

 the male. Carpus and hand rather short and thick, in the 

 adult smoothly rounded above and microscopically granu- 

 lated, in the young ornamented with small spiniform tuber- 

 cles ; outer surface of hand costate ; costae well marked and 

 granulated in the young, almost obsolete in the adult. Fin- 

 gers in the female with linear grooves on the sides. Ambu- 

 latory feet hairy ; third articles overreaching the margin of 

 the carapax ; tarsi with thick brushes of short hair along 

 the angles. Margins of abdomen and other parts on the 

 inferior surface generally, very hairy. Terminal article 

 of abdomen in the male slender, with somewhat concave 

 sides and bluntly pointed extremity. 



Color above dark purplish-brown ; below yellowish- 

 white, spotted with red ; finger and thumb black. 



