THE SPIDER CRABS OF AMERICA 



447 



Lateral marginal spines 5, arranged in an arc, the first or hepatic 

 spine the strongest; a dorsal hepatic spine (paired); 6 dorsal, 

 branchial spines (paired), of which 4 form 2 rows of 2 each longi- 

 tudinally placed, one row near the cardiac region, and the other 

 2 spines, fifth and sixth, are larger and in transverse line with the 

 third marginal spine; 1 spine above each post-lateral margin and in a 

 transverse line with the median intestinal spine. The supraocular 

 eave has a strong antero-lateral spine and a small post-lateral one 

 which overlaps the postocular cup; this cup is very prominent, has 

 a strong outward pointing spine and, at lateral angle of orbit, a 

 shallow tooth. Between the orbits there is a deep longitudinal 

 depression; rostrum ascending; tip with a broad, shallow bifurcation. 



Anterior tooth of basal antennal segment massive. Immediately 

 behind the segment there is a spine 

 pointing downward, another at the 

 buccal angle; 2 very strong, blunt, 

 pterygostomian spines. 



Chelipeds of female no longer than 

 next leg; merus with 2 tubercles above 

 near either end besides a short terminal 

 spine ; a few sharp tubercles on carpus ; 

 palms diminishing in width distally. 

 Legs with a short terminal spine on the 

 merus. 



First two segments of female abdomen 

 each armed with a median spine, second 

 segment also with two lateral lobes, 

 third with a median lobe. 



The young have proportionally much 

 longer spines. 



Measurements. — ^Adult female (9694), 

 length of carapace without rostrum 98, width without spines 87, with 

 spines 95, length of cheliped about 104 mm. Adult female (2107, M. 

 C. Z.), length of carapace to extremity of rostrum 113.2, width 

 without spines 82, with spines 88 mm. 



Range. — Gulf of Mexico; 13 to 35 fathoms. 



Material examined. — 



East of Delta of Mississippi River; lat. 29° 24' 30" N.; long. 

 88° or 00" W.; 35 fathoms; yl. S. bk. Sp.; Mar. 4, 1885; station 

 2388, Albatross; 1 adult female (9694). 



Highland section, Florida; lat. 27° 55' 30" N.; long, 83° 11' 30" W.; 

 13 fathoms; Co. R.; temp. 15.2° C; January 28, 1902; station 7253, 

 Fish Hawk; 1 young female (47097). 



Fig. 130.— Coeloceeus spinosus (9694), 

 maxilliped, x 2.33 



