276 University of California Publications in Zoology [VoL 23 
exceeded 5 fathoms, while the remaining eight (40%) were of inter- 
mediate depth. One specimen was secured while making hydrographic 
observations in the No. 2 Dumbarton oyster bed (H 5256). 
The extremes of temperature and salinity for this species as 
observed at the hydrographic stations, correlated with the dredging 
stations from which it was obtained are, respectively, 11.0° to 16.6° C, 
and 17.5 to 31.6. 
A complete list of stations includes: D 5730, 5750, 5766-5768, 
5778, 5781, 5782, 5784, 5803, 5810-5814, 5817, 5819, 5847, 5848, 5849; 
H 5256; Sausalito, Jan. 18, Feb. 14 and 17, Mar. 14, 1918; Point 
Bonita, Aug. 1, 1912; Key Route pier, piles, Aug. 2, 1912; north 
of Key Route pier, Aug. 2, 1912; Red Rock, Aug. 3, 1912; Richmond 
shore, Standard Oil pier, Aug. 3, 1912; Tiburon, Apr. 29, 1913. 
Genus Grapsodius Holmes 
Carapace striated above, with the sides converging behind, and armed with 
a single tooth behind the postorbital. Front broad, not deflexed, but with the 
median portion depressed. Eye-peduncles short. Orbits with the posterior sur- 
face bulging outwards instead of concave. Maxillipeds narrow, widely gaping, 
and devoid of an oblique piliferous ridge; merus subcordate, shorter than the 
ischium, the antero-internal angle produced; palp joined near the middle of the 
distal margin of the merus. Dactyls spinulous. Abdomen of the male seven- 
jointed. 
Grapsodius eximius Holmes 
Grapsodius eximius Holmes, Occas. Papers Calif. Acad. Sci., 7, 84, 1900. 
Original Description.—Carapace undulated in front and flattened behind. 
where it is more strongly striated; sides strongly converging posteriorly. The 
front is over one-half the width of the carapace and has the outer angles more 
or less projecting and rounded; the anterior edge is thin and minutely granulated ; 
viewed from above it is nearly straight, being slightly convex on either side 
of the middle where it is a little concave; viewed from in front it sags down- 
ward in the center. The orbits are remarkable in being swollen outward so that 
there is no hollow receptacle, as is usually the case, for the reception of the 
eyes; the superior orbital margin is marked by a fine ridge extending from the 
outer side of the front to the postorbital tooth; the inferior orbital margin is 
marked by a line of granules extending from the lower side of the postorbital 
tooth to the buceal area. Maxillipeds slender and wide apart. The ischium is 
much longer than the merus but not so wide; merus with the outer margin 
convex and the antero-external angle broadly rounded; the inner margin is 
straight and the antero-internal angle is produced into a prominent narrow lobe; 
first joint of the palp strongly convex near the middle of the inner margin; 
exognath at the base about one-half as wide as the ischium and tapering regu- 
larly to the tip which reaches slightly beyond the middle of the merus. Chelipeds 
subequal; merus short, trigonal, the outer surface transversely striated, the inner 
margin produced into a laminate expansion which is distally truncated and 
dentate; carpus with a spine near the middle of the upper margin; hands smooth 
