414 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



patterns of deep livid brown and dark vinaceous purple. Ambulatory legs 

 white with tone of cadmium yellow and touches of vinaceous purple on 

 upper surfaces of merus, carpus, and propodus; tip of dactyl yellow. 

 Cheliped like carapace with patterns of vinaceous purple in broad bands ; 

 two on merus and one on chela. Fingers white. (Petersen) 



Habitat. — Sand. 



Depth. — 10-60 fms. 



Remarks. — S. arcuatus is one of very few species of which no specimen 

 was available for illustration in the Rathbun monograph (1925). Known 

 previously only from Panamanian specimens, it is now recorded from the 

 Galapagos Islands in several widely separated localities. 



Genus MESORHOEA Stimpson, 1871 



Mesorhoea bellii (A. Milne Edwards) 



Plate 69, Figs. 5, 6 



Solenolambrus bellii A. Milne Edwards, Crust. Reg. Max., p. 163, pi. 



29, figs. 6-6d, 1878. 

 Mesorhoea bellii Rathbun, Bull. 129, U.S. Nat. Mus., p. 548, pi. 201 ; 

 pi. 280, figs. 1-4, and synonymy, 1925. Crane, Zoologica, vol. 22, 

 no. 3, p. 65, 1937. 

 Type locality. — Mexico. 

 Type. — In Paris Mus. 



Range. — From Abreojos Point, Lower California (Albatross), to 

 Panama Bay, including the Gulf of California; 9 to 71 fms. 

 Atlantic analogue. — M. sexspinosa Stimpson. 

 Material examined (8 specimens from 5 stations). — 

 55-33. Lat. 1° 03' 30'' S, Long. 90° 17' 30" W, 60 fms, Feb. 5, 1933, 



1 young female. 

 190-34. Lat. 0° 55' S, Long. 90° 30' W, 58-60 fms, Jan. 26, 1934, 1 



young female. 

 792-38. Off Daphne Minor Island, 70-80 fms, Jan. 20, 1938, 2 males, 



1 female. 

 810-38. (D-2) Barrington Island, 73 fms, Jan. 26, 1938, 1 young. 

 814-38. North of Hood Island, 20-40 fms, Jan. 28, 1938, 1 male 

 (photographed), 1 female. 

 Measurements. — Largest specimen: length 11.0 mm, width 14.6 mm, 

 cheliped 21.0 mm, chela 8.7 mm. 



Color in life. — Ground color of carapace pale ochraceous buff. Frontal 

 areas a tone darker and a little more yellow ; pattern on frontal area deep 

 olive buff. Chela pale ochraceous buff, fading on fingers to white tips. 



