1921] Schmitt: The Marine Decapod Crustacea of California 149 
II. Hand of larger cheliped finely pubescent and armed with three longitudinal 
rows of spines; a row of small spines on the inner edge and two rows of 
larger spines on the outer surface of the hand, with a broad smooth interval 
between them. Lateral margins of the carapace with from four to six teeth 
on each side. (Not known south of Humboldt Bay.) 
grebnitzkii, p. 150. 
Hapalogaster cavicauda Stimpson 
Plate 29, figure 1 
Hapalogaster cavicauda Stimpson, Ann. Lye. Nat. Hist. N. Y., 7, 81, pl. 1, 
fig. 7, 1859 (1862); Bouvier, Ann. Sci. Nat. (7), 18, 166, pl. 12, fig. 29, 
1895; Holmes, Occas. Papers Calif. Acad. Sci., 7, 113, 1900. 
a b 
Fig. 95. Hapalogaster cavicauda; a, dorsal view of carapace, ¢ (after 
Bouvier); b, @, natural size (after Stimpson). 
Characters.—Body and legs densely covered with short hair. Carapace nearly 
smooth but roughened or granulated at the insertions of the hairs. The portion 
of the anterolateral margin of the carapace in front of the cervical groove is con- 
vex, sublaminate, edentate, and separated from the portion behind by an incision; 
two marginal teeth at the origin of the sutures. Anterior margins of ambulatory 
legs deeply incised, forming four or five closely approximated teeth on each of 
the larger joints; the incisions are hidden by the hairiness of the legs. Hand of 
larger cheliped with one or more small, calcareous tubercles on inner face only, 
behind articulation of the dactyl. The calcareous plates on the basal (second) 
segment are widely separated by a membranous interval, in which there is no 
median plate; left side of abdomen of female is coriaceous and segmentally 
incised. 
Dimensions.—Type: length of carapace 18.3 mm., width 21.1 mm. 
Type Locality——Monterey, California. Common under rocks at low tide. 
Distribution —From Cape Mendocino to San Clemente Island, California. 
