part 1 garth: pacific oxyrhyncha 441 



middle, fading abruptly to white, tips dull ochre ; a spot of violet carmine 

 on fixed finger. A streak of grayish white on merus, outer distal portion 

 of carpus white with bluish lilac tint, a band of same color near distal 

 end of hand. Ambulatory legs same as cheliped but lighter, dactyl white 

 with dull ochraceous tint. (Petersen, of a specimen from Lobos de 

 Afuera Island, Peru) 



Frontal, gastric, and cardiac regions dark deep olive buff speckled 

 with capucine yellow and garnet brown. Anterior branchial regions and 

 all spines capucine yellow ; rest of carapace deep olive buff speckled with 

 yellow-white and garnet brown. Eye dark sulphin yellow. Chelipeds 

 same as carapace but lighter, with large white patches on merus, carpus, 

 and distal surface of manus ; fingers white except for reddish yellow at 

 base. Ambulatory legs deep olive buff banded with light garnet brown ; 

 dactyl pale cream color. (Petersen, of a specimen from Secas Islands, 

 Panama) 



Habitat: Sand, either alone or mixed with mud, shell, or coral. 

 (Garth, 1946) Of 15 dredge stations from which the species was recov- 

 ered by Hancock expeditions, 9 were sand bottom, with shell present in 

 2 and coralline in 3 ; 2 were mud bottom, with sand present in one ; 4 

 were rock bottom, with mud, coralline, shell, and nullipore variously 

 present. One of the two shore stations was Pocitlopora coral. 



Depth: Hancock expeditions mainland specimens were dredged in 

 from 12-95 fathoms, or, on two occasions, collected intertidally. 



Size and sex: Males were from 7.0 to 15.6 mm, females from 6.8 to 

 26.5 mm, ovigerous females 23.0 and 25.4 mm, and young from 4.5 mm. 



Breeding: The only ovigerous females encountered were the two 

 specimens taken at Lobos de Afuera Island, Peru, in mid-February, 

 which is southern hemisphere summer. 



Remarks: The widespread distribution of Parthenope (Platylambrus) 

 exilipes is well illustrated by Hancock collections. Although no speci- 

 mens were obtained from the west coast of Lower California, from 

 which the species had been reported previously, P. (P.) exilipes was 

 found in the Gulf of California, at Socorro Island of the Revilla Gigedo 

 Islands, in the Bay of Panama, the Galapagos Islands, in Colombia, and 

 northern Peru. The latter two localities represent an extension of range 

 from the Bay of Panama southward along the mainland coast. 



The young male from Socorro Island is very ornate. The determina- 

 tion of this specimen is by Mary J. Rathburw 



