1921] Schmitt: The Marine Decapod Crustacea of California 157 
Lopholithodes foraminatus (Stimpson) 
Plate 21, figure 2 
Echinocerus foraminatus Stimpson, Ann. Lye. Nat. Hist. N. Y., 7, 79, 1859 
(1862); Newcombe, Bull. Nat. Hist. Soe. Brit. Col., p. 27, pl. 3, 1893. 
Lopholithodes foraminatus Holmes, Oceas. Papers Calif. Acad. Sci., 7, 130, 
1900. 
Fig. 102. Lopholithodes foraminatus, dorsal view of carpus of chelipeds, J, 
X nearly 4 (after Newcombe). 
Characters.—Carapace depressed; gastric region elevated, furnished with a 
short, sharp, conical tubercle near the middle and a group of smaller tubercles near 
posterior end; cardiac region with a few short, subconical tubercles; from posterior 
gastric region an irregular line of tubercles extends to the posterolateral angles 
of the carapace; external to the orbits there are three spines in a nearly trans- 
verse line, behind which the anterolateral margin is at first concave and then 
strongly convex ; the spines on the convex portion of the margin are large and 
subconical; behind the convex portion the margin is concave and devoid of spines; 
posterior margin areuated and studded with conical tubercles. Rostrum rather 
short, with median spine, and cluster of spiny tubercles above the base. 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 carpus of the first 
pair of ambulatory legs forms a striking, smooth, nearly circular hole, or foramen, 
from which this species derives its name and by which it is distinguished from 
all others. Abdomen similar to that of L. mandtii. 
Dimensions.—Type: length of carapace 132.1 mm., width 214.9 mm. 
Type Locality Off the coast of California, near San Francisco. 
Distribution.—Victoria, British Columbia, to off San Diego, California, to a 
depth of 299 fathoms. 
Remarks.—Easily recognized by the remarkable foramen between the chelipeds 
and the first ambulatory legs (Holmes). 
Genus Rhinolithodes Brandt 
Carapace triangular, with a deep semilunar fossa separating the smooth hemi- 
spherical cardiac region from the other regions of the carapace, which are roughly 
and more or less coarsely tuberculate, and raised above the cardiac region. Plates 
of basal (second), and three following abdominal segments distinct. 
