REVIEW OF POLYIPNUS AND ARGYROPELECUS SCHULTZ 145 



POLYIPNUS FRASERI Fowler, 1934 



Pohjipnus fraseri Fowleb, Proc. Acad. Nat. Sci. Philadelphia, vol. 85, p. 257, 

 fig. 19, 1934 (type, U. S. N. M. no. 92324, examined by the author).— Paer, 

 Bull. Bingham Oceanogr. Coll., vol. 3, no. 7, p. 55, 1937. 



The correct catalog number for the type in the United States Na- 

 tional Museum is 92324 and not as published. The correct locality 

 is Albatross station 5476, which is in latitude 12°56'24'' N., longitude 

 124°25'24''' E., and not as published. On Fowler's page 258, second 

 paragraph, and fig. 19, p. 254, it is stated in the original description 

 "no adipose fin." However, when the type was immersed in alcohol 

 the small adipose fin showed up clearly. In fact all the species of 

 this genus have a small adipose fin. 



POLYIPNUS NUTTINGI Gilbert, 1905 



Volyipnus nuttingi Gilbert, Biill. U. S. Fish Comm., vol. 23 (for 1903), pt. 2, 

 p. 609, pi. 73, 1905 (type, U. S. N. M. no. 51599, examined by the author, 

 Albatross station 4088, Pailolo Channel between Molokai and Maui, 297 

 to 306 fathoms). 



Polyipnus spinosus (non Giinther) Gilbert and Cramer, Proc. U. S. Nat. Mus., 

 vol. 19, p. 416, 1897 (U. S. N. M. no. 51593, cotypes, 33 specimens, 34 to 70 

 mm, Albatross station 4102, between Maui and Molokai Islands, Hawaii, 

 122 to 132 fathoms, July 23, 1902). 



U. S. N. M. no. 47720, one specimen, 41 mm, Albatross station 

 3476, latitude 21°09' N., longitude 157°53' W., December 6, 1891. 



Genus ARGYROPELECUS Cocco 



Argyropelecus *Cocco, Arch. Accad. Peloritano, 1829, p. 146 {A. hemigymnus 



Cocco), 

 Pleurothyris *Lowe, A history of the fishes of Madeira, p. 64, 1843 {Stenioptyx 



olfersii Cuvier). 



This genus may be recognized by the following characters: A dis- 

 tinct dorsal blade in front of the soft dorsal fin; no pair of spines 

 just anterior to the origin of soft dorsal fin; 12 abdominal photo- 

 phores; 6 supra-abdominal photophores; the lateral photophore is 

 lacking, and 2 suprapectoral photophores ; anal fin divided. 



Argyropelecus elongatus Esmark (1871 p. 489) is too briefly de- 

 scribed to be recognized. After examining the very inadequate de- 

 scriptions and poor figure of Argyropelecus hocagei (Osorio, 1909, 

 pp. 27-28, pi. 2, fig. 3; Seabra, 1911, p. 176; and Nobre, 1935, p. 350) 

 I agree with Norman (1930) that it is unrecognizable. 



SYNOPSIS OF THE SPECIES OF ARGYROPELECUS 



o\ No spine present at posterior end of abdomen below insertion of pelvic fins ; 

 photophores forming a nearly continuous series from behind pectoral to 

 base of caudal fin ; depth of body 1.8 to 2 and head 3.5 to 3.75 times in 

 standard length (tip of snout to base of caudal fin rays) ; preopercle at 



