156 University of Califorma Publications in Zoology [VoL 23 
Key TO CALIFORNIA SPECIES OF LOPHOLITHODES 
I. Tubercles of chelipeds and ambulatory legs spiniform; carpus of chelipeds 
with outer edge excavated, forming a smooth, deep, rounded sinus, which 
when approximated to the shallower corresponding sinus on the anterior 
edge of the first pair of ambulatory legs forms a striking, smooth, nearly 
circular hole, or foramen. ; a 
foraminatus, p. 157. 
II. Tubercles on legs generally rounded, blunt, and knob-like; carpus of chelipeds 
without a smooth, deep, rounded sinus on outer edge. (Not known south 
of Monterey.) mandtii, p. 156 
Lopholithodes mandtii Brandt 
Plate 21, figure 1 
Lopholithodes mandtii Brandt, Bull. Phys.-Math. Acad. Imp. Sci. St. 
Petersb., 7, 174, 1849. 
Echinocerus cibarius White, Proc. Zool. Soc. London, 47, pls. 2, 3, 1848: 
Bouvier, Ann. Sci. Nat. (7), 18, 184, pl. 11, fig. 13, pl. 12, 1895. 
Lopholithodes mandtiti Holmes, Occas. Papers Calif. Acad. Sci., 7, 128, 
1900; Way, Puget Sd. Mar. Sta. Publ., 1, 356, fig. 12, 1917. 
Fig. 101. Lopholithodes mandtii, ventral view of abdomen, 2 (after Bouvier). 
Characters.—Carapace strongly convex; gastric, cardiac, and branchial regions 
each with a prominent elongate, subconical tubercle, subacute on gastric area, 
blunt and rounded on others; anterolateral margin armed with a variable num- 
ber of about eight, prominent, blunt spines and several smaller spines; a large 
knob-like prominence at each posterolateral angle, separated from the last antero- 
lateral spine by a conspicuous sinus, two similar smaller prominences on either 
side of the middle of posterior margin of carapace. Rostrum short and consisting 
of a strong subconical tubercle, above the base of which is a knob bearing two 
lateral tubercles with generally a tubercle above, and behind the notch between 
them. Tubercles on legs generally rounded, blunt, and knob-like. Basal abdom- 
inal segment is strongly concave behind, especially in the female, and at nearly 
right angles to the carapace; there are two very prominent tubercles near the 
middle and several smaller ones on the margins, the remaining segments studded 
with numerous subconical tubercles. 
Dimensions.—Type: length of carapace 152.4 to 177.8 mm., width about 177.8 
to 203.2 mm. 
Color.—Very brilliant, scarlet or orange, with bright purple markings particu- 
larly on ventral part of the body and the spines on the legs (Way). 
Type Locality.—Sitka, Alaska. 
Distribution.—Sitka, Alaska, to Monterey, California. 
