1921] Schmitt: The Marine Decapod Crustacea of California 153 
was undoubtedly taken along with Randallia ornata in course of 
several experimental trials with a 40-foot otter-trawl in 10 to 30 
fathoms outside of Golden Gate, April 6, 1914. 
II. Abdomen segmented and subdivided into more or less well calcified plates 
which are usually applied quite closely to the thoracic sternum; basal 
(second) segment always provided with a pair of marginal and a pair of 
lateral plates, and a median plate; plates either separated by sutures or 
more or less completely fused with one another; abdomen quite smooth or 
armed with more or less prominent tubercles or spines; occasionally abdom- 
inal plates have a central membranous area. Carapace quite strongly 
convex, at least in the gastric region; roughly triangular, pentagonal or 
hexagonal; front usually more or less narrow; rostrum usually exceeding 
the eye-stalks. (Group I, p. 148.) 
Genus Phyllolithodes Brandt 
Carapace triangular, provided with rounded tubercles, which surround an 
excavated area on the dorsal surface; lateral margins armed with spines. Abdom- 
inal plates with a central membranous area. 
Phyllolithodes papillosus Brandt 
Plate 22, figure 2 
Phyllolithodes papillosus Brandt, Bull. Phys. Math. Acad. St. Petersb., 7, 
175, 1849; Bouvier, Ann. Sci. Nat. (7), 18, 174, pl. 11, fig. 12, pl. 12, 
figs. 14, 25, pl. 13, fig. 1, 1895; Holmes, Occas. Papers Calif. Acad. Sci., 
:7, 122, 1900; Rathbun, H. A. E., 10, 164, 1904. 
Fig. 99. Phyllolithodes papillosus, ventral view of abdomen, g (after Bouvier). 
Characters.—Carapace with two deep pits within triangular area on dorsal 
surface. Rostrum prominent, ending in two tuberculiform horns, below with a 
subacute median spine. Chelipeds and ambulatory legs thickly covered with long, 
flattened, obtusely ending papillated spines, somewhat like narrow, flattened plates 
in appearance; these are largest on the merus and carpus, diminishing toward the 
tip. Abdomen furnished with calcareous plates, with distinct, characteristic 
raised and rounded papillated edges, within which there is a central membranous 
area; median and lateral plates separated by a suture. 
Dimensions.—Type: length of carapace 46.6 to 48.7 mm., width 42.4 mm. 
Type Locality —Kadiak Island, Alaska. 
Distribution—Unalaska to Monterey, California. To a depth of at least 
16 fathoms (Rathbun). 
