PART 1 GARTH : PACIFIC OXYRHYNCH A 81 



Male abdomen with six segments; first segment with or without a 

 conical spine ; sides of last two segments subparallel ; extremity widened 

 and rounded. Female abdomen with five free segments, fused fifth to 

 seventh segment broader than long, flattened, nearly covering sternum. 



Contains but two species: Paradasygyius depressus (Bell), Pacific, 

 and P. tuberculatus (Lemos de Castro), Atlantic. 



Range: Eastern Pacific from Ensenada de San Francisco, Sonora, 

 Mexico, to Cape Corrientes, Colombia. Erroneously attributed to the 

 Galapagos Islands. Western Atlantic at Mucuripe, Fortaleza, Ceara, 

 Brazil. 5-80 fathoms. 



Paradasygyius depressus (Bell), new combination 

 Plate E, Fig. 5 ; Plate 4, Fig. 2 



Microrhynchus depressus Bell, 1835a, p. 88; 1836, p. 42, pi. 8, figs. 2, 



2d-f. 

 Neorhynchus depressus A. Milne Edwards, 1879, p. 187. Rathbun, 



1894, p. 73. 

 Dasygyius depressus Rathbun, 1898, p. 570; 1910, p. 571 ; 1925, p. 138, 



pi. 1 ; pi. 274, figs. 5-8. Boone, 1927, p. 135, fig. 37. Crane, 1937, 



p. 56. Garth, 1946, p. 375; 1948, p. 24. 

 Dasygius depressus Boone, 1930a, p. 78, pi. 22. 



Type: Female holotype, length 12.7 mm, width 12.7 mm, originally 

 in the Museum of the Zoological Society of London, no longer extant, 

 as ascertained by correspondence with the British Museum (Natural 

 History). Male neotype: A.H.F. No. 398, from 10 miles southwest of 

 Secas Islands, Panama, 30 fathoms, March 27, 1939, Velero HI station 

 944-39. 



Type locality: The locality cited by Bell, Galapagos Islands, 6 

 fathoms, sandy mud, is considered erroneous (See Remarks below, and 

 also under Collodes gibbosus). In keeping with the provisions of the 

 Copenhagen Decisions in Zoological Nomenclature (1953, p. 27, par. 2), 

 the type locality is hereby corrected to Bay of Panama, in which Hugh 

 Cuming is known to have made collections. 



Localities subsequently recorded, with collectors: Mexico: Gulf of 

 California: La Paz Bay, 21 and 26.5 fathoms, Albatross (Rathbun, 

 1894, 1898) ; Gorda Banks, Arena Bank, and Santa Inez Bay, 29-60 

 fathoms, Zaca (Crane) ; Costa Rica: Wafer Bay, Cocos Island, in- 

 shore, Ara (Boone, 1930a) ; Panama: Pinas Bay, 14-33 meters, and 

 Guayabo Chiquito, 24-64 meters, Askoy (Garth, 1948) ; Colombia: 

 Ardita Bay, 34-43 meters, Octavia Bay, 24-28 meters, and Utria Bay 

 [Port Utria], 12-22 meters, Askoy (Garth, 1948). 



