156 University of California 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. 



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, pis. 2, 3, 1848 : 



Bouvier, Ann. Sci. Nat. (7), 18, 184, pi. 11, fig. 13, pi. 12, 1895. 

 Lopholithodes mandtii Holmes, Occas. Papers Calif. Acad. Sci., 7, 128, 



1900; Way, Puget Sd. Mar. Sta. Publ., 1, 356, fig. 12, 1917. 



Fig. 101. Lopliolithodes mandtii, ventral view of abdomen, J (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. 



