PART 1 GARTH : PACIFIC OXYRHYNCHA 325 



trie, anterior cardiac, and intestinal), and four branchial (paired) form- 

 ing two transverse lines on the carapace ; posterior gastric spine wanting. 

 (Rathbun, 1925) 



Material examined: Hancock expeditions material: 14 specimens 

 from 7 stations. (See Table 66) From San Juanico Bay to Marcy 

 Channel, Magdalena Bay, Lower California. California Academy of 

 Sciences material: San Bartolome Bay, Lower California, Mexico, De- 

 cember 16, 1916, "surface haul with lampara net (?)," Albatross, 1 

 female; Santa Maria Bay, Lower California, Mexico, August 11 and 

 12, 1932, Zaca, 1 large male (the neotype), 1 ovigerous female. 



Measurements: Male neotype: length 68 mm, width 55 mm, rostrum 

 7.8 mm, width 8.0 mm, cheliped 122 mm, chela 58 mm, dactyl 25 mm, 

 height of palm 12.7 mm, ambulatory legs 91, 68, 59, and 49 mm, re- 

 spectively. Ovigerous female, length 42 mm, width 31 mm. 



Color in life: Not recorded. 



Habitat: Green mud; fine gray sand. (Rathbun, 1925) Hancock 

 specimens were dredged from sand bottom in all but one instance. 



Depth: 5 to 25 fathoms {Velero III) ; to 51 fathoms {Albatross). 



Size and sex: Excluding the specimens from the California Academy 

 of Sciences measured above, and a 55 mm female obtained by the Velero 

 IV very recently, Hancock collections have consisted entirely of young 

 males of from 6.4 to 21 mm and young females of from 12.0 to 26.8 mm. 

 The largest specimen on record is the 95 mm male from Playa Maria 

 Bay (U.S.N.M. No. 19523) collected by A. W. Anthony. (Rathbun, 

 1925) 



Breeding: The single ovigerous female examined was encountered 

 by the Zaca at Santa Maria Bay, Lower California, in August. 



Remarks: Lest there be any question concerning the priority of Lock- 

 ington's name over that of Streets, the following is quoted : "His Libinia 

 setosa is a valid species and has since been redescribed in 'Bulletin No. 

 7' of the National Museum by Dr. Streets as L. semizonale. Mr. Lock- 

 ington's name, however, will hold." (Streets and Kingsley, 1877, p. 108) 



Of historical interest also, in view of the more recent emphasis placed 

 upon geographical distribution, is this quotation from Lockington's 

 original description: "I have never seen a specimen of L. canaliculata, 

 nor Randall's specimen of L. affinis, but it is unusual to find an Atlantic 

 species existing unaltered at such a point as San Bartolome Bay, remote 

 both from the Isthmus of Panama and from Behring's Straits, and for 

 this reason I should not be surprised if it should prove distinct." 



