10 NEW-YORK FAUNA — CRUSTACEA. 
margins, on the pedipalpi, anterior and posterior edges of the swimming feet, anterior edge 
of the carpus, and interior margin of the hand, finger and thumb. 
Color. Shell light horn, with numerous reddish irregularly rounded spots having clear 
spaces in the centre. Hands and feet whitish tinged with reddish, and spotted with dull red. 
Hands silvery white beneath, bright red on the margins, and with large red spots. Tarsi 
bluish horn, tipped with reddish: finger and thumb with their tubercles dark red. Beneath, 
silvery white. 
Length, 2°3. Transverse diameter, 2°8. 
This beautiful species, of which the specimen described above is one of the largest size, is 
common along our sea-beaches. Although occasionally eaten, it is not much esteemed as an 
article of food. By the shore-dwellers, it is often designated as the Lady Crab, from the 
beauty of its colors. : 
GENUS LUPA. Leach. 
Transverse diameter of the shield usually more than double its length. Each latero-anterior 
margin with nine prominent spines, of which the posterior is generally largest, and directed 
externally and laterally. The external antenne inserted on the edge of the basillary joint, 
which moves in a wide cavity under the internal canthus. Abdomen of the male with its 
two last joints narrow ; of the female, wide, with its last joint very small, triangular. Tarsi 
of the last pair oval, and adapted for swimming. 
Lupa DICANTHA. 
PLATE Ill. FIG. 3. 
Portunus hastatus. Fapricius, Suppl. Entom, Syst. p. 367. 
Ps pelasgicus. Bosc, Hist, Nat.'des Crustacés, Vol. 1, p. 219, pl. 5, fig. 3. 
FP: dicanthus. LaTREILLE, Hist. Nat. des Crust, etc. Vol. 10, p. 190. 
Lupa hastata. Say, Jour. Acad. Nat. Sciences, Vol. 1, p. 65. 
Lupea dicantha. M1tne-Epwarps, Hist. Nat. des Crust. Vol. J, p. 451. 
Lupa id. Gouxn, Invertebrata of Mass. p. 324. 
Description. Surface of the shield with distant granulations, becoming obsolete behind 
others arranged in four transverse series ; two parallel with each other on the anterior part of the 
shell, and one on each side running to the tips of the long posterior spines. Front with three 
spines; two on the plane of the shield, and one beneath it. From the base of this last, arise 
the two internal antenne, cleft at their tips. External antenne long, filiform, reaching the 
fourth lateral spine. Anterior feet large, subequal, with three oblique spines on the anterior 
edge of the arm, another at the outer tip, and two others near it, obsolete. Hands swollen, 
sublinear, with five elevated granulated lines and a stout spine at the base, and three others 
which are often obsolete near the fingers. Fingers incurved, with 12 - 14 unequal tooth-like 
tubercles in each, Second and third pair of feet subequal; fourth shorter: all the joints of 
