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, 1913 ; 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 subco'rdate, 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 



Grapsodiv-s 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 buccal 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 



