PART 1 GARTH : PACIFIC OXYRHYNCHA 475 



Rocky Point, Gulf of California, Mexico, to Santa Elena Bay, Ecuador. 

 In addition to the above, 3 specimens from a single Askoy station. 

 (Garth, 1948) 



Measurements: Male specimen (not largest) : length 10.0 mm, 

 width 12.0 mm, rostrum 1.2 mm, width 1.6 mm, cheliped 26.0 mm, 

 merus 9.9 mm, manus 11.9 mm, dactylus 3.9 mm, height of palm 3.2 

 mm. Female specimen: length 10.2 mm, width 13.4 mm. The largest 

 specimen is a 10.4 mm Askoy Expedition male. 



Color in life: Yellowish, sometimes with bluish-gray patches on the 

 carapace, and bands of the same color across the chelipeds. (Stimpson) 



Dorsal surface of carapace light olive gray with lighter longitudinal 

 stripes, a few blackish brown dots on margin and dorsal ridge. Chelipeds 

 white except for a broad band of mineral gray at the base of merus and 

 a similar band on distal end of propodus and base of movable finger. 

 Ambulatory legs pale olive gray with dark band on base of propodus of 

 fourth leg only. Ventral side white with a few light brown dots. (Peter- 

 sen, of a specimen from Santa Maria Bay, Lower California, Mexico) 



Carapace pale colonial buff with longitudinal stripes of pale purplish 

 avellaneous on which a narrow purple beaded stripe is superimposed. Eye 

 clear with pinkish tinge and bright red tip. Chelipeds and ambulatory 

 legs as carapace; upper surface covered with avellaneous except for a 

 few patches ; small marginal teeth red-purple. Movable finger warm buff 

 crested with purple at base. Ventral side pale colonial buff. (Petersen, 

 of a specimen from Parker Bay, Costa Rica) 



Habitat: Of 32 stations, bottom was sand in 21, with shell present 

 in 7, coralline in 3, and nullipore, rock, and gravelly mud in 1 each; 

 mud in 5, with shell present in 1 ; rock in 5, with gorgonians present 

 twice and sand and shell present once each; shell with mud in one in- 

 stance. 



Depth: 2-26 fathoms. 



Size and sex: Males are from 5.0 to 10.4 mm, females from 5.7 to 

 10.2 mm, ovigerous females from 6.6 to 9.0 mm, and young from 

 4.5 mm. 



Breeding: Females with ova were encountered in the Gulf of Cali- 

 fornia and off Ecuador in February, and off Costa Rica in March. 



Remarks: The range of the species has been extended northward to 

 include the whole of the Gulf of California from Rocky Point south to 

 Isabel Island, Mexico, and southward from Cape Pasado {Askoy rec- 

 ord) to La Libertad, Ecuador. 



