614 



PROCEEDINGS OF THE NATIONAL MUSEUM 

 Table 4. — Number of gill rakers on first gill arch 



I have not seen specimens is unsolved, and all subspecies of the 

 lynchus complex of populations may disappear into groups of more 

 or less overlapping populations. 



Although the height of the dorsal blade varies considerably from 

 specimen to specimen of lynchus lynchus, six measured from the 

 Western Atlantic had a shorter blade (1.8 to 2.2 times in base of 

 soft dorsal) than those from the Eastern Pacific and South Atlantic 

 (1.1 to 1.9 times in base of soft dorsal), but other differences were 

 not observed. 



Description: Counts made are given in table 1, p. 591, and table 

 2, p. 592; measurements made are given in table 3, p. 593. 



Range: This subspecies occurs in the Eastern Pacific and Atlantic 

 Ocean. I have studied material from: Pacific: Off Panama, 10 

 specimens; Galapagos, 9 specimens; off Northern Peru, 49 specimens; 

 off Cocos Island, 5 specimens; off Clipperton Island, 7 specimens; 

 off Costa Rica, 3 specimens. Atlantic: Off Delaware, 1 specimen; 

 Iceland, 1 specimen; Bahamas, 1 specimen; Caribbean Sea, 6 speci- 

 mens; Azores, 4 specimens; northwest of Cape Verde Islands, 1 

 specimen. 



Depths range down to 2,222 fathoms (USNM 150259). 



Argyropelecus lynchus sladeni Regan 



Argyropelecus sladeni Regan, Trans. Linn. Soc. Zool., vol. 12, p 218, 1908 (type 

 locality, Chagos Archipelago, Indian Ocean, depth 400 to 500 fathoms). — ■ 

 Jespersen in Joubin, Faune ichthyologique de l'Atlantique nord., No 15, 

 figs., 1934 (? North Atlantic).— Schultz, Smithsonian Misc. Coll., vol. 91, 

 No. 27, p. 4, 1937 (detailed measurements); (in part) Proc. U.S. Nat. Mus., 

 vol. 86, p. 153, 1938 (Philippine Islands) —Norman, John Murray Expedi- 

 tion, 1933-34, Scientific reports, vol. 7, No. 1, p. 20, 1939 (Indian Ocean, 

 depth 200 to 2,926 meters). — Fowler, Fishes of the Red Sea and southern 

 Arabia, Jerusalem, vol. 1, p. 86, 1956 (Red Sea). 



Study material: USNM 103015, Albatross station 5368, lat. 

 13°35'30" N., long, 121°4S' E., depth 181 fathoms, February 23, 



