81°55' W., 200 to 240 fm. (366-439 m.)- TABL 

 100566 (1); Oregon 3615, 14°16' N., 81°55' W., 

 200 fm. (366 m.). USNM 185093 (1) and FMNH 

 74571 (3); Oregon 1868, 16°36' N., 82°37' W., 175 

 fm. (320 m.). USNM 159353 (1); Oregon 1871, 

 16°39' N., 82°26' W., 250 fm. (457 m.). ANSP 

 98604 (14); Oregon 3626, 16°45' N., 81°27' W., 

 150 fm. (274 m.). TABL 100562 (3); Oregon 3627, 

 16°50' N., 81°21' W., 200 fm. (366 m.). FMNH 

 66218 (2); Oregon 1883, 16°52' N., Sl°30' W., 200 

 fm. (366 m.). 



South America.— USNM 159356 (3); FMNH 

 66222 (2); Oregon 1985, 9°41' N., 59°47' W., 

 150 fm. (274 m.). USNM 159357 (9) and UF 8026 

 (4); Oregon 1989, 9°45' N., 59°45' W. UF 5237 (6) 

 and FMNH 66221 (6); Oregon 1983, 9°43' N., 

 59°53' W., 125 fm. (229 m.). USNM 203049 (1); 

 Oregon 4465, 10°45' N., 66°37' W., 125 fm. (229 

 m.). USNM 203032 {1); Albatross 2700, 10°59' N., 

 66°00' W., 140+ fm. (256+ m.). MCZ 45937 (6); 

 Oregon 4838, 11°09.5' N., 74°24.5' W., 170 to 180 

 fm. (311-329 m.). TABL 100568 (1); Oregon 4858, 

 11°09' N., 74°25' W., 160 fm. (293 m.). USNM 

 188973 (2); Oregon 4860, 11°09' N., 74°26' W., 

 155 to 160 fm. (284-293 m.). USNM 203033 (1); 

 Oregon 4410, 11°52' N., 69°27' W., 230 fm. 

 (421 m.). USNM 203048 (2); Oregm 4408, 11°53' 

 N., 69°28' W., 230 fm. (421 m.). USNM 203030 

 (2); Oregon 4407, 11°59' N., 69°30' W., 230 fm. 

 (421 m.). 



Antilles.— TABL 100570 (4); USNM 187838 

 (14); Oregon 3549, 17°50' N., 77°52' W., 170 fm. 

 (311 m.). USNM 186355 (1) and FMNH 66227 

 (1); Oregon 2653, 18°18' N., 67°18.5' W., 300 fm. 

 (549 m.). USNM 186354 (1); Oregon 2656, 18°24' 

 N., 67°15' W., 100 fm. (183 m.). MCZ 40588 (4); 

 FMNH 66228 (5) ; Oregon 2658, 18°26' N., 67°11.5' 

 W., 175 fm. (320 m.). USNM 186352 (2); Oregon 

 2664, 18°31.5' N., 66°46.5' W., 160 fm. (293 m.). 

 USNM 186353 (1); Oregon 2665, 18°31.5' N., 

 66°50' W., 180 fm. (329 m.). USNM 186357 (1) 

 and FMNH 66229 (1); Oregon 2666, 18°32' N., 

 66°46.5' W.,200 fm. (366 m.).TABL 100565 (2); 

 Silver Bay 5161, 19°57' N., 71°05' W., 190 fm. 

 348 m.). 



ARGENTINA EUCHUS COHEN 

 Figure -2 



A. exichius was originally described from only 

 two specimens (Cohen, 1961). On the basis of an 

 additional 15, we here present a new diagnosis and 



counts and measurements as well as a range ex- 

 tension. 



Diagnosis 



A. euchus differs from sphyraena and silus in 

 its smooth instead of spiny scales and by its five 

 instead of six branchiostegals. It diffei-s from spJiy- 

 raemt., dlus, siaiis, aliceae, elongata, and hriKei in 

 havintr six gill rakeis on the lower arm of the firet 

 arch rather than seven or more. It has 47 or 48 ver- 

 tebrae, more than aliceae and hrucei, which have 

 43 to 46 ; and fewer than silits., elongata. aii-sfraliae, 

 kagoshimae, and stewarti, which have 49 to 67. It 

 difi'ei-s from siaiis and att-straliae in having 16 to 18 

 pectoral rays rather than 11 to 14. It differs from 

 silus, striata-, georgei, hntcei, and stewarti in hav- 

 ing 10 or 11 ventral rays rather than 12 or more. 



Counts 



See tables 1 to 7. 

 Measurements 



Based on 14 specimens, 123 to 154 mm. standard 

 length, given as percent of standard length. Pre- 

 anal 82.4 (81.2-83.6); maxillary width 1.6 (1.4- 

 1.8) ; depth at dorsal fin 13.5 (11.9-15.3) ; head 

 depth 12.9 (11.7-13.8). 

 Discussion 



The measurements given above were used, on 

 the basis of the two types, to help separate A. 

 euchus from A. elongata. austraJiae, and kago- 

 shimae (Cohen, 1961). The additional material 

 herein reported upon shows that with the excep- 

 tion of body depth and head depth in separating 

 euckus from au-straliae, morphometric data are un- 

 satisfactoi-y in diagnosing A. euchus. 



Four specimens examined lacked silvery pig- 

 ment or iridescence on their swimbladders. 



Distribution 



A. euchus has been taken off Natal, southern 

 Mozambique, and Kenya at depths ranging from 

 131 to 322 fm. (240-589 m.). 

 Study Material 



All from the western Indian Ocean. USNM 

 203160 (1 specimen), Anton Bmun cruise 8, sta. 

 421 G, 02°56' S., 40°28' E. 240 m. USNM 203159 

 (11), MCZ (1), FMNH (1), and BMNH (1); 

 Anton Brunn cruise 8, sta. 396 B, 25°32' S., 33°24' 

 E., 450 to 455 m. 



ADDITIONS TO A REVISION OF ARGENTININE PISHES 



33 



