Fig. 63. Myctophum evermanni Gilb. 

 (after Gilbert). 



slightly behind the origin of ventrals, its hmdermost rays 

 opposite to the origin of the anal. Adipose fin opposite to 

 the last dorsal rays. Caudal forked. Scales cycloid, thin, deci- 

 duous. Luminous organs: A small dorsal and ventral antor- 

 bital at the frontmargin of the eye. Two operculars, a larger 

 dorsal one somewhat below the level of the ventral margin of the 

 eye, a smaller ventral one behind the angle of upper jaw; 

 3 branchiostegal ones; 5 

 nearly equally distant PO, 

 between isthmus and ven- 

 trals. 2 PVO, one before 

 the lower base of the 

 pectoral, the other obli- 

 quely before and below 

 it and above and slightly 

 before the second PO. 

 PLO below the lateral 

 line, above the interspace 

 between the two PVO. 4 equidistant. VO in a series between 

 ventral and anus. 12 13 AO in 2 groups, the anterior con- 

 taining 7 9 above the anterior 3 / 4 of the anal, the posterior 

 group beginning above the last anal ray or behind it, con- 

 taining 4 6; the most frequent arrangement being 8 + 5, 

 others are: 7 -f~ 5> 7 + 6, 9 + 4. Separated from them by an 

 interspace the 2 Prc, a little obliquely arranged. VLO nearly 

 in the middle between lateral line and origin of ventrals. 

 3 SAO nearly forming a right angle, the first above the 

 second VO, the second in the same level as the first, above 

 and slightly behind the last VO, the third quite near the 

 lateral line above and somewhat behind the second, about in 

 the vertical through the anus. Pol near the lateral line, above 

 the last organ of the anterior group of AO. Brownish to 

 blackish, except sides of head which are whitish. Length 

 nearly 50 mm. 



Habitat: Halmahera Sea (surface) !; Banda Sea (2000 o M., 

 vertical net)!; Manipa strait (1536 o M., vertical net)!. - 

 Round Hawaian Islands. 



9. Myctophum spinosum (Steind.). 



Scopclus spinosus Steindachner, Ichthyol. Notizen, V. Sitzber. Akad. Wien, LV. 

 1867, p. 711. 



