mm. SL, A. hmoalensis has a vertical band of pig- 

 ment above the subcaudal photophores, a medial 

 patch over the anal photophores, and a row of 

 pigment spots along the lateral midline anterior 

 to the anal photophores Specimens of A. lychnus 

 of the same size possess no pigment on the poste- 

 rior portion of the body, and pigment in the areas 

 above the subcaudal and anal photophores begins 

 to show only faintly at about 17 mm. 



At about 25 mm. SL, body pigment extends 

 backward to the posterior edge of the anal group 

 of photophores on both species. The vertical area 

 between the anal and subcaudal photophores in A. 

 hawaiensis bears a row of pigment spots along the 

 lateral midline (a posterior extension of the an- 

 terior row mentioned for the 14-mm. size) . The 

 area above the subcaudal photophores is strongly 

 pigmented on both species and gives, on gross ex- 

 amination, the impression of a colorless, vertical 

 band between the anal and subcaudal groups of 

 photophores. This "banded" area fills in with 

 pigment dorsoventrally in adults, and in 25-mm. 

 specimens of A. hawaiensis the beginning of this 

 process is evident. Specimens of the same size of 

 ^4. lychnus have little or no pigment in this area, 

 and the lower portion of this area immediately 

 between the anal and subcaudal photophores may 

 be void of pigment in specimens of A. lychnus as 

 large as 42 mm. SL. 



Body depth in relation to standard length over- 

 laps between the two species in the smaller juve- 

 nile sizes. At larger sizes A. lychnus has the deeper 

 body; above 32 mm. SL the body depth of A. 

 lychnus is about 62-71 percent SL and that of A. 

 hawaiensis about 54—60 percent SL. 



An additional character useful in separating the 

 two forms at sizes of about 45 mm. SL and larger 

 is the formation of small spines along the ventral 

 edges of the scales overlying the subcaudal photo- 

 phores on specimens of A. lychnus. The spines 

 start to develop on specimens between 40 and 45 

 mm. SL. These spines are absent on all specimens 

 of A. hatoaiensis examined including the largest in 

 our collections (62 mm. SL) and one of the para- 

 types at Scripps Institution of Oceanography 

 (SIOH53-372, 52 mm.). 



27. Argyropelecus sp. 



110.50, B6203, (1) 15 mm. 



This damaged specimen cannot be specifically 

 identified. 



28. Sternoptyx diaplunui Hermann. 



Figure 8D. 

 60.80. H6204, (1) 43 mm.; 60.100, H6204, (3) 13-18.5 

 mm.; 60.180, H6204, (5) 8-29 mm.; 70.200, H6204, (6) 

 11-37 mm.; 80.70, H6204, (2) 14.5-16 mm.; 80.100, H6204, 



(1) 34 mm.; 83.77, C6303, (1) 25 mm.; 84.67, €6303, (1) 

 22.5 mm.; 86.92, C6303, (13) 14.5-57 mm.; 87.80, 06303, 

 (3) 19-59 mm.; 87.90, C6303, (1) 54 mm.; 90.45a, H6105, 



(2) 24-37 mm. ; 90.48a, H6105, (1) 27 mm. ; 90.160, H6204, 

 (5) 24-42.5 mm.; 90.180, H6204, (1) 19.5 mm.; 90.200, 

 H6204, (4) 7-27.5 mm. ; 95.31a, B6204, (1) 15 mm. ; 100.65, 

 C6303, (1) 28 mm. ; 100.80, H6204, (4) 15-37 mm. ; 100.140, 

 H6204, (3) 28.5-36.5 mm.; 100.160, H6204, (3) 13-28.5 

 mm.; 110.120, H6204, (3) 32-39.5 mm.; 110.160, H6204, 

 (10) 12.5-51 mm.; 120.45, H6204, (1) 32.5 mm.; 120.50. 

 H6204, (1) 26.5 mm.; 120.90, H6204, (1) 31 mm. 



29. 



GONOSTOMATIDAE 



Gonostoma atlanticum Norman? 



Figure 13B. 

 80.55, H6204, (1) 65 mm.; 80.80, H6204, (1) 45 mm.; 

 80.90, H6204, (1) 56 mm.; 90.100, C6208, (1) 28.5 mm.; 

 97.65, C6303. (1) 52 mm.; 100.120, H6204, (1) 63.5 mm. 



These specimens appear to represent G. atlanti- 

 cum Norman, but are only tentatively identified 

 because of the arrangement of the maxillary teeth. 

 Grey (1960: 107) described the last four enlarged 

 maxillary teeth of G. atlanticum as having no in- 

 terspace teeth. The above specimens possess inter- 

 space teeth between the enlarged teeth on the 

 maxillary. 



30. Gonostoma ebelmgi Grey. 



Figure 13B. 

 90.160, C6208, (1) 124 mm. 



This specimen represents an appreciable range 

 extension from the original area of its description, 

 the Marshall Island area, by Grey (1960:109). 



31. Cyclothone Goode and Bean. 



This is probably the most abundant deepwater 

 genus of fishes off the coast of California. How- 

 ever, the collection data indicate that hauls made 

 shallower than 550 m. do not adequately sample 

 their population. Of the several thousand speci- 

 mens taken by the IKMWT (the most efficient 

 device in present use for the consistent capture of 

 these fishes), only about 11 percent were, taken 

 where the net was fishing above an estimated depth 

 of 550 m., and nearly all of these fish were C. sig- 

 nata and C. acclinidens — apparently the two most 

 abundant species in the California-Baja California 

 area at any depth. 



PELAGIC FISHES, CALIFORNIA CURRENT AREA 



643 



