90.140, H6204, (1) 56.5 mm. ; 90.160, H6204, (1) 33 mm. ; 

 97.40, C6303, (1) 97 mm.; 97.65, C6303, (4) 75-120 mm.; 

 100.65, C6303, (1) 70 mm.; 100.120, H6204, (1) 62 mm.; 

 100.140, H6204, (1) 67 mm. 



B. flemingi was described as a new species 

 from the Eastern North Pacific (Aron and Mc- 

 Crery, 1958 :181) , although it differed only slightly 

 from the inadequately described B. indicas Brauer 

 from the Indian Ocean. Recent evidence indicates 

 that the two species may be synonymous (R. H. 

 Gibbs, personal communication). We found a 

 range in pelvic fin rays of 2 + 2 to 2 + 5 in several 

 specimens counted. 



55. Melanostomiatidae, unidentified. 

 60.180, H6204, (4) 18-30 mm. 



These larval specimens have not been identified. 



IDIACANTHIDAE 



56. Idiacanthus antrostomus Gilbert. 



Figure 16B. 



60.80, H6204, (5) 53-118 mm.; 60.80, C6208, (1) 216 

 mm.; 60.90, H6204, (1).207 mm.; 60.90, C6208, (1) 154 

 mm.; 60.100, H6204, (4) 65-79 mm.; 60.100, C6208, (1) 

 149 mm. ; 60.120, B6203, (3) 168-269 mm. ; 60.160, B6203. 

 (1) 160 mm.; 60.180, H6204, (3) 62-124 mm.; 70.80b, 

 B6203, (2) 100-137 mm.; 70.80-5N, B6203, (1) 121 mm.; 

 73.200, B6203, (1) dis. ; 80.55, H6204, (1) 135 mm.; 80.70, 

 H6204, (1) 67 mm. (larva) ; 80.100, B6203, (1) 241 mm.: 

 82.69, 06303, (2) 99-252 mm.; 83.77, C6303, (16) 64-348 

 mm.; 84.70, C6303, (1) 150 mm.; 84.92, B6303, (1) 115 

 mm.; 86.92, C6303, (17) 61-371 mm.; 87.80, O6303, (4) 

 66-266 mm. ; 87.90, C6303, (4) 123-260 mm. ; 88.105a, 

 B6303, (1) 344 mm ; 90.48a, H6105, (2) 69-333 mm. ; 90.60, 

 H6204, (1) 73 mm.; 90.110, C6303, (4) 236-300 mm.; 

 90.120, H6204, (2) dis., 70 mm. ; 90.140, H6204, (1) 95 mm. ; 

 90.140, C6208, (2) 58-84 mm. ; 90.150, C6208, (1) 125 mm. ; 

 90.160, H6204, (1) 65 mm.; 90.160, C6208, (1) 73 mm.; 

 90.180, H6204, (1) 104 mm.; 90.200, H6204, (1) 42 mm.; 

 93.100, C6303, (4) 60-342 mm.; 97.40, C6303, (10) 66-320 

 mm. ; 97.65, O6303, ( 1 ) 210 mm. ; 100.60, H6204, ( 1 ) 249 

 mm.; 100.65, O6303, (8) 60.5-274 mm.; 100.80, H6204, (2) 

 dis., 59 mm.; 100.90, H6204, (1) 233 mm.; 103.50, C6303, 

 (1) 259 mm.; 108.63, C6303, (9) 134-343 mm.; 110.46, 

 C6303, (3) 209-348 mm.; 110.35, C6303, (8) 156-212 mm.; 

 110.120, H6204, (1) 98 mm.; 110.160, H6204, (2) 77-115 

 mm.; 120.80, H6204, (1) 292 mm.; 123.45, B6212, (1) 144 

 mm. ; 123.50, B6203, (7) 178-292 mm. 



This is probably the only species of this genus 

 that occurs in the eastern Pacific ; as /. panamensis 

 Regan and Trewavas, described from the Gulf of 

 Panama, may lie a junior synonym of /. antrosto- 

 mus (R. II. Gibbs, personal communication). An 

 adult male of 70 mm. SL from station 60.80, 

 II('>204 is larger than maximum sizes of males re- 



ported as 44 mm. (adult) and 48 mm. (post larva) 

 by Beebe (1934:234-236). This was the most 

 abundant and ubiquitous of the 12 species of the 

 suborder Stomiatoidei taken on the survey. 



ASTRONESTHIDAE 



57. Borostoniias pcmam-ensis Regan and Tre- 

 wavas. 



Figure 16B. 



80.90, H6204, (1) 244 mm.; 84.70, O6303, (1) 195 mm.; 

 86.92, C6303, (4) 85-270 mm. ; 90.45, H6105, (1) 218 mm. ; 

 90.48a, H6105, (1) 111 mm.; 120.90, H6204, (1) 186 mm. 



B. macristius and B. panamensis, both described 

 as new species from the Gulf of Panama by Regan 

 and Trewavas (1929: 26-27), are synonymous (R. 

 H. Gibbs, personal communication). According 

 to specimens taken by this survey and in the col- 

 lections of Scripps Institution of Oceanography, 

 B. panamensis ranges at least from the Gulf of 

 Panama to SSE. of Point Conception, Calif. 



CHAULIODONTIDAE 



58. Chauliodus macouni Bean. 



Figures 15D and 17. 



60.60, H6204, (5) 27.5-184 mm.; 60.80, H6204, (1) 39 

 mm. ; 60.80, C6208, ( 1 ) 120 mm. ; 60.90, C6208, ( 1 ) 68 mm. ; 

 60.100, H6204, (2) 36-53 mm.; 60.140, H6204, (1) 36 mm.; 

 80.55, H6204, (3) 32-127 mm.; 80.70, H6204, (1) 26 mm.; 

 80.70, O6208, (1) dis.; 80.90, H6204, (2) 35.5-36 mm.; 

 80.100, H6204, (1) 31 mm.; 83.77, O6303, (3) 32-36 mm.; 

 83.90, O6303, (4) 51-64 mm.; 84.67, C6303, (1) 32.5 mm.; 

 84.70, O6803, (3) 33-198 mm.; 86.92, O6303, (5) 162-213 

 mm.; 87.80, C6303, (7) 169-204 mm.; 87.90, C6303, (5) 

 184-207 mm.; 90.60, H6204, (1) 40 mm.; 90.110, C6303, 

 (2) 162-171 mm. 



The genus Chauliodus has been revised by Re- 

 gan and Trewavas (1929), Ege (1948), and Mor- 

 row (1961). Only two species of Chauliodus are 

 known in the eastern Pacific. C. barbatus Garman 

 ranges from Peru (Morrow, 1961 : 270) northward 

 to about 1,770 km. (1,100 miles) SE. of southern 

 Baja California (lat. 13°01' N., long 127°11' W., 

 SIO 60-215 ) . C. macouni ranges from Japan, the 

 southern part of the Bering Sea, and through the 

 Gulf of Alaska (Morrow, 1961:275-276) south- 

 ward to the offshore waters of northern Baja 

 California (station 90.110, C6303). With one 

 .exception, all evidence points to a geographic 

 separation of these two species, about 1,770 km. 

 (1,100 miles) separating their known ranges. 



The one exception is a single specimen recorded 

 by Ege (1948: 108) as C. macouni from lat. 0°18' 



652 



U.S. FISH AND WILDLIFE SERVICE 



