266 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 21 



their basal half or two-thirds ; dactylus as long or nearly as long as upper 

 margin of palm, with a subbasal tooth ; immovable finger with a basal 

 tooth; distal ends of fingers meeting, their edges crenulate. 



Legs of the first pair exceeding cheliped little or not at all ; other 

 pairs considerably shorter and themselves diminishing successively in 

 length. Merus of each terminating in a short, sharp point above ; dactyli 

 slender and curved. (Rathbun, 1925) 



Compared to typical Chorilia longipes, the carapace of C. I. turgida 

 is much rougher, more spinous, the tubercles replaced by short, sharp 

 spines ; the hepatic margin bears a spine instead of a tubercle or blunt 

 ridge ; the width of the carapace increases notably in proportion to the 

 length, the branchial regions are inflated and approach nearer the median 

 line, the distance between them being not more than half the greatest 

 width of the cardiac region ; the movable segments of the antennal 

 peduncle are longer and more slender. (Rathbun, 1924a) 



Material examined: Of typical Chorilia longipes: 20 specimens from 

 13 stations. (See Table 53) From off McKay Point, British Columbia, 

 to SE end of Santa Catalina Island, California. Of C. I. turgida: 152 

 specimens from 43 stations. (See Table 54) From San Miguel Island, 

 Channel Islands, California, to Cortez Bank, Lower California, Mexico. 

 While the preponderance of southern California specimens have been 

 referred to C. I. turgida, select specimens from as far south as 12 miles 

 SW of Newport Beach might with propriety have been referred to typical 

 C. longipes, the northern form. 



Measurements: Of Chorilia longipes: male: length 50.4 mm, width 

 at branchial spines 30.2 mm, rostrum 18.6 mm, width 5.0 mm, cheliped 

 71 mm, chela 35 mm, dactyl 17.2 mm, height of palm 6.3 mm, ambu- 

 latory legs ca. 84, 68, 62, and 54 mm, respectively. Of C. I. turgida: 

 male: length 70.8 mm, width 52 mm, rostrum 18.4 mm, basal width 6.9 

 mm, cheliped 123 mm, chela 61.5 mm, dactyl 32.5 mm, height of palm 

 17.5 mm, ambulatory legs 120 (est.), 105, 90, and 80 mm, respectively. 

 Ovigerous female: length 54 mm, width 40 mm. 



Color in life: Usually white, but occasionally bright flesh pink, the 

 color persisting for years in alcohol. 



Habitat: Specimens from off Santa Catalina Island were most fre- 

 quently recovered by the dredge with smooth, round boulders, by which 

 many were crushed. Occurring in the same hauls were Paralithodes 

 rathbuni (Benedict) ; Munida and Munidopsis, galatheid shrimps; 

 Psolus, a sessile holothurian ; and a siliceous sponge. 



