1921] Schmitt: The Marine Decapod Crustacea of California 163 
II. Latero-inferior regions of carapace not bulging, not visible from above. 
A. Eyes faceted and well pigmented. Integument crisp. Exopodite of first 
maxilliped terminating in a flagellum. 
1. Rostrum broad, flattened dorsoventrally, laterally toothed. Abdomen 
dorsally unarmed. (Known from off Santa Cruz Island.) 
Galathea, p. 163. 
2. Rostrum long and slender, spine-like, laterally compressed, unarmed; 
with a well developed supraorbital spine on either side of the 
base. Abdomen often unarmed dorsally. 
Munida, p. 164. 
B. Eyes opaque, non-faceted, and devoid of pigment. Integument thick, 
and very strongly calcified. Exopodite of first maxilliped not ter- 
minating in a flagellum. Rostrum elongate triangular, with or with- 
out lateral spines. Abdomen generally armed dorsally. 
Munidopsis, p. 167. 
Genus Pleuroncodes Stimpson 
Carapace with latero-inferior regions swollen so that epimeral structures, sides 
of carapace, are visible from above. Rostrum long and slender, spiniform, with a 
supraorbital tooth on either side of the base. Abdomen dorsally unarmed. 
Pleuroncodes planipes Stimpson 
Plate 31, figure 2 
Pleuwroncodes planipes Stimpson, Ann. Lyc. Nat. Hist. N. Y., 7, 245, 1860.— 
Holmes, Occas. Papers Calif. Acad. Sci., 7, 112, 1900. 
Characters.—Carapace more or less convex, tapering anteriorly, transversely 
rugose, anterior edges of rugae fringed with closely set short hairs; with the 
exception of a few spinules behind the supraorbital teeth carapace is devoid of 
spines above; there is a spine at the rounded anterolateral angle, behind which 
there are a few spines on the lateral margin. Rostrum long and slender, scabrous 
above, and continued upon the carapace as a carina; supraorbital teeth spine-like, 
confluent at base with rostrum. Chelipeds slightly hairy; ambulatory legs 
scabrous, with penultimate joints distinctly flattened and ciliated. 
Dimensions.—Type, male: length of carapace, rostrum included, 24.1 mm., 
greatest width 13.7 mm. 
Type Localities.—Pacifie Ocean, lat. 24° N, long. 130° W, and Monterey, Cali- 
fornia. 
Distribution.—From ninety miles southwest of San Francisco, California, to 
150 miles southwest of Cape St. Lucas, Lower California. 
Remarks.—This species lives in the open ocean and is sometimes found in vast 
quantities in the Pacific Ocean off the American coast. In March, 1859, it was 
thrown ashore in considerable numbers at Monterey, California (Stimpson). 
Genus Galathea Fabricius 
Rostrum flattened dorsoventrally, rather broad, laterally toothed. Ocular 
peduncles distally dilated only slightly if at all. Abdominal segménts unarmed. 
Carapace more or less evenly convex, tapering somewhat anteriorly, transversely 
rugose, anterior edges of rugae fringed with closely set, short hairs, dorsal surface 
with one or more pairs of sharp spines, lateral margins spiny. ° 
