No. 10 garth: erachyuran fauna of the galapagos 511 



Type. — Not extant. 



Range. — From Humboldt Bay, California (Dall), to Payta, Peru 

 (Jones) ; Galapagos Islands (Albatross) ; also occurs in the Atlantic. 



Diagnosis. — Carapace smooth, bare, convex in both directions, length 

 and breadth subequal. Frontal width approximately half of carapace 

 width, front entire or slightly bilobed. A small lateral tooth behind outer 

 orbital tooth. 



Material exarnined. — None from Galapagos. 



Remarks. — ^While the writer has examined as many living sea turtles 

 on Galapagos beaches as are likely to come under the observation of one 

 collector, he has not been fortunate in finding this pelagic species in the 

 situation from which it has been reported, about the reptile's venter. Like 

 Plagusia iminaculata Lamarck, which rides upon drifting logs, its occur- 

 rence depends to a large extent upon the vagaries of ocean currents and 

 eddies. 



Subfamily VaRUNINAE 



Genus EUCHIROGRAPSUS Milne Edwards, 1853 



Euchirograpsus americanus A. Milne Edwards 



Plate 85, Figs. 5, 6 



Euchirograpsus americaiiiis A. Milne Edwards, Bull. Mus. Comp. Zool., 

 vol. 8, p. 18, 1880. Rathbun, Bull. 97, U.S. Nat. Mus., p. 282, pi. 

 74, text f^g. 144, 1918. 

 Type locality. — Barbados, 69 fms. 

 Type.—CotYpti in MCZ, No. 6132. 



Range. — From off South Carolina (Albatross) to off Santa Lucia 

 (Blake); Caribbean Sea; 42-278 fms. 



Diagnosis. — Carapace squarish, covered with pubescence. A single lobe 

 on the inner surface of the merus of the third maxilliped. Three small 

 spines behind outer orbital spine on margins of carapace. Legs hairy with 

 conspicuous bands of orange red. 



Material examined (Two specimens from as many stations). — 

 186-34. Cartago Bay, Albemarle Island, 32 fms, Jan. 25, 1934, 1 



female. 

 795-38. Sulivan Bay, Jam.es Island, 35-40 fms, Jan. 21, 1938, 1 male 

 (photographed). 

 Measurements. — Largest specimen, male: length 11.8 mm, width 

 13.3 mm, cheliped 19.0 mm, chela 10.0 mm, dactyl 5.7 mm. 



Color in life. — Ground color light apricot orange, a shade darkei on 

 frontal portion of carapace, which is marked by delicate orange-red 

 blotches and small orange-red dots. Eye green. Chelae apricot orange 



