THE SPIDER CRABS OF AMERICA 



199 



Description. — Carapace covered with spines or with spines and 

 tubercles. Surface clothed with a vesicular pubescence mixed with 

 longer, curved, yellow bristles which are most numerous about the 

 spines and form a longitudinal row extending from either side of the 

 gastric region to the extremity of the rostrum. A stout spine on the 

 margin of the hepatic region and another equally large just below 

 the margin. A tubercle on the edge of the supraocular eave just 

 above the eye. The basal antennal article besides the antero- 

 external spine has a tubercle on the outer margin and another on the 

 anterior margin at the insertion of the next article. 



Chelipeds of adult male much enlarged and about one and one- 

 fourth times the length of the carapace. Outer surface of merus 

 and carpus and upper surface of proximal half 

 of manus tuberculate; merus sub triangular, three 

 or four spines on upper margin. Hand much 

 swollen, about two-thirds as thick as high and 

 about two-thirds as high as its superior length. 

 Fingers gaping for less than half their length. 



Legs subcylindrical; merus with a few spines 

 or tubercles on distal half of upper margin, most 

 evident in the first pair; carpus elongate, with 

 a few tubercles or spines, and a longitudinal de- 

 pression on the outer surface; propodus smooth. 

 The vesicular pubescence on the legs is for the 

 most part longer than on the carapace and ex- 

 tends to the horny tips of the dactyls; a few 

 curved, yellow bristles are intermixed. 



Measurements.— Male (18640), length of cara- 

 pace to tip of horn 200 mm., width 159 mm., length of propodus of 

 cheliped on lower margin 120, on upper margin 66, width of same 

 46, thickness 34.5, length of movable finger 64 mm. 



Range. — From Sari Francisco, California, to Point San Bartholome, 

 Lower California; to a depth of 68 fathoms; not common. Fossil in 

 Fresno County, California, in Lower Pliocene series. 



Material examined. — 



CALIFORNIA 



Near San Francisco; Lieut. W. P. Trowbridge, U. S. A., collector; 

 1 female, holotype (15376). 



Santa Barbara; 1880; D. S. Jordan; 1 male (3050) covered with 

 bryozoans. 



Off Santa Barbara; lat. 34° 19' 30" N.; long. 119° 44' 15" W.; 68 

 fathoms; gn. M.; 54° F.; May 11, 1889; station 2973, Albatross; 1 

 male (17379). 



Fig. so.— Loxorhvnchus 

 gkandis (.54738), maxilli- 

 PED, X 1.87 



