242 University of California Publications in Zoology [Vou 28 
margin; the proximal end of the inner margin of the upper surface is, however, 
well marked; dark color of fingers does not run back on palm. Carpal joints of 
ambulatory legs slightly bilobed on the anterior or upper margin; propodal joints 
have a convex anterior margin without lobes. 
Dimensions.—Type, male: length of carapace 13.7 mm., width 20.3 mm. Male 
specimen examined by Miss Rathbun: length 22.5 mm., width 33.8 mm., propor- 
tion of length to width 1 : 1.5, fronto-orbital width 16 mm., proportion of fronto- 
orbital width to width of carapace 1 : 2.11. 
Color.—Crimson or beet red; carapace sometimes lighter in color, or yellow- 
ish, maculated with deep red. Northern specimens are more transverse, rougher, 
more pubescent, and more sober in coloration than those found in warmer lati- 
tudes (Stimpson). Color in life of this species as of Lophopanopeus heathii is 
extremely variable.... Some specimens are almost pure white while others show 
various irregular patterns of bluish and dark red or are wholly of the latter color 
(Weymouth). 
Type Locality—Monterey, California. 
Distribution—Prince William Sound; Kasaan Bay, Prince of Wales Island, 
Alaska (Rathbun). Vancouver Island, British Columbia to Monterey Bay, Cali- 
fornia (Holmes). Lower California (A. Milne Edwards). 
Remarks.—Miss Rathbun says: ‘‘There are on the Pacific Coast six closely 
allied species of Lophopanopeus ; some of these have been confused with L. bellus 
and L. leucomanus; therefore the published localities from which I have not 
examined specimens, are accepted with a reservation.’’ 
In the collection of the U. S. National Museum this species is not represented 
from any locality south of Puget Sound. 
Lophopanopeus frontalis (Rathbun) 
Plate 37, figure 3 
Lophozozymus (Lophoxanthus) frontalis Rathbun, Proc. U. S. Nat. Mus., 
16, 236, 1893. : 
Lophoxanthus frontalis Holmes, Oceas. Papers Calif. Acad. Sci., 7, 64, 
pl. 1, figs. 5-6, 1900. 
Lophopanopeus frontalis Rathbun, H. A. E., 10, 181, pl. 7, fig. 8, 1904. 
a b 
Fig. 144. Lophopanopeus frontalis; a, chela; b, carapace (after Holmes). 
Characters——Carapace almost smooth; frontal lobes markedly oblique and 
sinuous, middle lobes very convex. Carpus of chelipeds is smoother than in 
L. bellus; hand smooth, with a large tooth projecting inward on the inner side 
of the upper margin, and extending half the length of the upper margin; dark 
color of fingers runs back on the palm, in this respect differing from all other 
allied species. Carpal joints of ambulatory legs are slightly bilobed on the 
anterior or upper margin; propodal joints have a convex anterior margin but are 
narrower than in L. bellus. 
