PART 1 GARTH : PACIFIC OXYRHYNCHA 443 



spiniform teeth, 10 or 11 of these on outer margin of hand ; teeth granu- 

 lated like those of carapace but not ramose; beneath, the hands orna- 

 mented with longitudinal rows of small, smooth tubercles, largest along 

 inner edge and fading out toward exterior margin. Legs slightly com- 

 pressed, not cristate, smooth and unarmed ; last two and a half [segments] 

 furred. 



A small, slender spine on penult [segment] of male abdomen ; female 

 abdomen furred. (Stimpson, as modified by Rathbun) 



Material examined: 28 specimens from 13 stations. (See Table 95) 

 From Isabel Island, Mexico, to Santa Elena Bay, Ecuador. 



Measurements: Largest specimen, female: length 21.6 mm, width 

 29.0 mm, rostrum 2.1 mm, width 2.4 mm, exorbital width 9.0 mm, 

 cheliped (right) 51 mm, merus 17.4 mm, manus 22.7 mm, dactylus 10.5 

 mm, height of palm 9.4 mm. Male specimen: length 19.0 mm, width 25.0 

 mm, rostrum 1.8 mm, width 2.5 mm, exorbital width 8.9 mm, cheliped 

 51 mm, merus 18.5 mm, manus 26 mm, dactylus 10.0 mm, height of palm 

 8.0 mm. 



Color in life: Carapace and chelipeds acajou red. Eye light olive 

 green with tiny red spots. Fingers pinkish white, tips yellowish ochre red. 

 Ambulator}^ legs same as carapace but lighter, fading to pale yellow on 

 dactyl. Ventral side grayish white. (Petersen, of a specimen from Isabel 

 Island, Mexico) 



Habitat: Sand, black mud, and gray sand. (Garth, 1948) Of the 11 

 Velero HI stations for which data on bottom type are available, 4 were 

 mud, with sand and rock present twice each ; 2 were sand, with nullipore 

 present in one ; 2 were rock with shell present in one ; 2 were coralline ; 

 and one was shell bottom. 



Depth: Hancock expeditions specimens were obtained in from 2-30 

 fathoms. 



Size and sex: Males are from 6.5 to 19.0 mm, females from 7.2 to 

 21.6 mm, ovigerous female 13.6 mm, and young from 3.5 mm. 



Breeding: The single ovigerous female was obtained at Bahia Honda, 

 Panama, in late February. 



Remarks: The series is remarkably uniform, no geographical varia- 

 tion being detectable throughout the range, which has been extended 

 northward from Manzanillo to Isabel Island, Mexico, and southward 

 from Malaga Bay, Colombia, to La Libertad, Ecuador. 



