Study Material 



All study material from Peru. Holotype: USNM 

 202462, 147 mm. standard length; R.V. Anton 

 Bruun cruise 16, station 641-A, 6°54' S., 80°44' W., 

 97 to 110 m.; 6 June 1966; otter trawl. Paratypes: 

 USNM 202459 (84 specimens, 1 cleared and 

 stained); data as for holotype; from the same 

 station MCZ (5); SIO (5). Paratypes: USNM 

 202460 (97); Bruun 640-B, 7°01' S., 80°44' W., 

 105 m.; otter trawl; from the same station USNM 

 202472 (1 lacking pectoral fins); FMNH (5); 

 CAS (3). USNM 202463 (18); Bruun 639-A, 

 6°47' S., 80°43' W., 100 to 91 m.; otter trawl. 

 USNM 202465 (1); Bruun 635-A, 6°27' S., 

 80°56' W., 160 m.; otter trawl. USNM 202464 

 (3); Bruun 631-A, 5°59' S., 81°12' W., 100 m.; 

 otter trawl. USNM 202461 (320), Bruun 630-A, 

 6°02' S., 81°12' W., 160 m.; otter trawl; from the 

 same station BMNH (5) ; UZMC (4) ; MNHN (3) ; 

 ANSP (3). USNM 202466 (4); Bruun 627-A, 

 5°02' S., 81°24' W., 192 to 311 m.; otter trawl. 

 USNM 202467 (2); Bruun 625-A, 4°57' S., 81°23' 

 W., 118 to 133 m.; otter trawl. USNM 199802 

 (4); SW. of Lobos de Afuera Islands, Peru, 110 

 m.; trawl. 



ARGENTINA SIALIS GILBERT 



Figure 2 



The heretofore northernmost locality for A. 

 sialis is Monterey Bay, Calif. (Follett, 1945). An 

 extension of the known range of about 1,120 km. is 

 provided by a single specimen ( 147 mm. standard 

 length) taken by the John N. Coll off the coast of 

 Oregon on 3 March 1962 : USNM 188126, 46°04' 

 N., 124°39' W., 100 to 102 fm. (183-187 m.), otter 

 trawl, bottom temperature 8.3° C. The specimen 

 agrees well with the description given by Cohen 

 (1958). 



Additional vertebral counts based on specimens 

 from southern California listed by Cohen (1958) 

 are presented in table 2. 



ARGENTINA STRIATA GOODE AND BEAN 



Figures 1, 2, 3, 4, 5, 7, 8, 9, lOA 



Argentina striata Goode and Bean, 1896, p. 52, 

 pi. 17, fig. 62 (original description; type-locality: 

 Allatross station 2402, 28°36' N. 85°33' "W., Gulf 

 of Mexico, 111 fm. Holotype: USNM 43858, not 

 designated in text of original description, but on 

 p. 4 of the Atlas in the caption for pi. 17, fig. 62). 

 Diagnosis 



This species can be separated from A. sfhyraena 

 and sillies by its smooth instead of spiny scales and 

 by its five instead of six branchiostegals. It differs 

 from sllu.'i, sialis, aliceae, and elongate, in having 

 6 (occasionally 7) gill rakers on the lower arm of 

 the first arch, whereas the four species list«d above 

 have 8 to 21. It also differs in gill raker count from 

 A. Irucei, wliich has 7 (occasionally 6) rakers; 

 also striata has 47 to 51 vertebrae; Irucei has 44 

 to 46. It differs from euchus in having 12 to 15 

 ventral rays rather than 10 or 11. It differs from 

 kagoshiTnae, australiae, elongata, sialis, and 

 sph.yrae7xa in having 18 to 21 rather than 11 to 17 

 pectoral rays. It differs from georgei and stewarti 

 in usually having silvery pigment on the swim- 

 bladder, whereas the others lack it; from stewarti 

 in having 47 to 51 vertebrae rather than 52 or 53; 

 from georgei in having caudal peduncle depth in 

 head length usually less than 5.7 rather than 

 usually more than 5.7. 

 Counts 



See tables 1 to 6. 

 Measurements 



Based on about 55 specimens, 88.0 to 173 mm. 

 standard length, given as percent of standard 



FiGTJKE 1.— Argentina striata, USNM 203003, 154 mm. standard length. Cross section from In front of dorsal fin. Scales not 



drawn. Drawn by Mildred H. Carrington. 



22 



U.S. FISH AND WILDLIFE SERVICE 



