170 University of California Publications in Zoology [Vou 23 
Carapace is iridescent; the short and rather elevated rugae are hairy. Merus 
and carpus of ambulatory legs spiny. Merus of chelipeds triangular in cross- 
section, with four spines on the upper ridge and two on the inner; carpus with 
five or six spines; two prominent ones on the crest of the palm; prehensile edges 
of fingers evenly dentate. 
Dimensions,—Type: length of carapace and rostrum 22 mm., of rostrum about 
5 mm.; length of hand 13 mm. 
Type Locality Off San Diego, California, 822 fathoms (‘‘ Albatross’’ station 
2923). 
Distribution.—From Monterey Bay, California, to off Cerros Island, Lower 
California, 684 to 1084 fathoms. 
Munidopsis quadrata Faxon 
Munidopsis quadrata Faxon, Bull. Mus. Comp. Zool., 24, 188, 1893; Mem. 
Mus. Comp. Zool., 18, 97, pl. 23, fig. 1, 1895; Rathbun, H. A. E., 10, 
167, 1904. 
Fig. 109. Munidopsis quadrata, X about 2 (after Faxon). 
Characters.—Lateral margins of carapace straight, at right angles to straight 
anterior margin, upper surface spineless but furnished with scattered low, squamous 
tubercles; central part of the gastric region prominent above the anterior 
branchial lobes, from which it is separated by deep pits; a prominent transverse 
ridge on the cardiac region forms the posterior wall of a deep fossa. Second 
segment of abdomen armed with a median spine, which is curved forward, third 
