Boo7ie, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 203 



.Family : GRAPSIDAE. 



Subfamily: Grapsinae. 



Genus: GRAPSUS Lamarck. 



Grapsus grapsus Linne. 



Plate 69. 



Name: "Sally Liglitfoot"; rock crab. 



Diagnostic characters: Carapace vivid scarlet, discoidal; carpal 

 spine ovate-acuminate; fingers spoon-shaped. Front vertical, depth 

 in median line slightly greater than half its length. 



Type: The type localities were given as America and Ascension 

 Island. The type material is no longer extant. 



Distribution : ' ' Sally Lightf oot " is a well-known inhabitant of the 

 tropical and subtropical shores of America from Miami, Florida, 

 southward through the West Indies and Bermudas to Pernambuco, 

 Brazil, on the East Coast and on the West Coast from San Benito 

 Island. Lower California, southward, including the Galapagos Islands, 

 down to Chile; it is also known from the tropical eastern Atlantic, 

 including the Azores and the west coast of Africa. 



Material examined : One young female, one male taken along the 

 tideline, Turtle Rocks, Bahamas. Seven specimens from Hood Island, 

 Galapagos, several of which are egg-laden, March, 1928 ; four of these 

 specimens are in the juvenile molt. One male, Wafer Bay, Cocos 

 Island, March 5, 1928, taken by the ''Ara," William K. Vanderbilt, 

 commanding. 



Color: Adult male. Bright scarlet on the dorsal surface of the 

 carapace and legs ; the epistome is light orange yellow touched with 

 scarlet ; the pterygostomian region and underside of the carapace are 

 neropalin blue streaked with light orange yellow; parts of the inner 

 and under sides of the basal joints of the legs are neropalin blue ; the 

 merus, carpus and part of the propodus are bright scarlet ; the distal 

 part of the propodus and daetyli are light orange yellow; the cheli- 

 peds have these latter joints vivid scarlet. The eyestalks are yellow ; 

 the cornea is violaceous. The adult female has the same coloration as 

 the male. 



Young : Male and female. The carapace is chocolate brown striated 

 with light orange yellow and maculated with flecks of neropalin blue. 



