1921 J Schmitt: The M a V ■* Decapod Crustacea of California 163 



II. Latero-inf erior regions of . carapace not bulging, not visible from above. 



A. Eyes faceted and wel'i "jfej'iliented. 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 epirneral 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 



Pleuroncodes planipes Stimpson, Ann. Lye. 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. — Pacific 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. 



Memories. — 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 segments 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. 



