PART 1 GARTH : PACIFIC OXYRHYNCHA 457 



Ambulatory legs with men' compressed, the teeth on upper crest 

 partly overlapping, leaving interstices between, lower surface excavate 

 between sutured side margins; carpus crested; propodus with two pro- 

 jections on posterior margin ; dactyli slightly curved and granulous to 

 corneous tips. 



Abdomen in both sexes seven-segmented, deeply eroded with a reg- 

 ular pattern, the third segment widest, the sixth longest. (Glassell, con- 

 densed) 



Material examined: 9 specimens, plus fragments of a 10th, from 7 

 mainland stations. (See Table 100) From Playa Blanca, Costa Rica, to 

 Octavia Bay, Colombia. In addition, 1 male specimen from Tower 

 Island, Galapagos Islands, station 782-38, shore, January 16, 1938, not 

 previously reported. For an additional 11 specimens from 4 Galapagos 

 stations see Garth (1946, p. 412). 



Measurements: Male holotype: length 31.2 mm, width 48.6 mm, 

 exorbital width 10.5 mm, cheliped 70 mm, merus 23.7 mm, manus 37.7 

 mm, dactylus 16.5 mm, height of palm 20.0 mm. Female paratype: length 

 29.3 mm, width 45.4 mm, exorbital width 10.5 mm, cheliped 52 mm, 

 merus 16.9 mm, manus 30.0 mm, dactylus 13.0 mm, height of palm 

 16.8 mm. 



Color in life: Not recorded. 



Habitat: Under rocks at extreme low tide. (Garth, 1946, of Galap- 

 agos specimens) The Octavia Bay specimen was obtained from coral. 



Depth: Shore to 12 fathoms. (Glassell) Three of the 7 mainland 

 stations were dredge stations. 



Size and sex: Males in the mainland series are from 10.0 to 25.1 

 mm, females from 8.2 to 18.2 mm, ovigerous female 18.2 mm. 



Breeding: The single ovigerous female was encountered in Colombia 

 in late January. 



Remarks: Omitted from the list of material examined are specimens 

 from Cape San Lucas and from Nicaragua in the collection of the late 

 Steve A. Glassell, as well as additional specimens from stations listed in 

 the original description that were retained by him. These were seen at 

 one time by the writer, but are not now available for purposes of meas- 

 urement, comparison, and analysis. Measurements of holotype and female 

 paratype above do not agree in entirety with those published in the 

 original description, probably because of differences in methods used by 

 Glassell and by the writer. They are consistent with other measurements 

 given in this volume. 



