570 Bulletin 47, United States National Museum. 



a. Mediolateral photophores 3, in obliquely vertical line; anterolateral 1; posterolateral 1. 

 I. Pectoral short; caudal photophores close together. 



c. Posterolateral photophore in front of soft dorsal; D. 12; A. 19; scales 41 to 45. 



PUNCTATUM, 854. 



cc. Posterolateral under adipose dorsal. 



d. Scales 37; anal spots 7 to 10 + 4 to 6. AFFINE, 855. 



dd. Scales 40; anal spots 8 + 6 ; D. 12; A. 20. OPALINUM, 856. 



aa. Mediolaterals 2; posterolaterals 2. 



e. Posterolateral spot 1, over break in the anal series. 



/. Pectoral long, falcate, reaching middle of dorsal; caudal spots separated; postero- 



latera) before adipose dorsal, behind middle of anal; anal spots 7 to 9 + 4 to 9. 



g. D. 12; A. 20; scales 41. HUMBOLDTI, 857. 



gg. D. 14; A. 22; scales 42. CALIFORNIENSE, 858. 



ff. Pectorals moderate, barely reaching front of dorsal; scales 41: posterolateral much 



before adipose dorsal, over middle of anal; anal spots 5 to 7 + 11 to 14. D. 12- 



A. 19. GRACILE, 859. 



ee. Posterolateral spots 2, over the break in anal series. 



h. Anterolaterals side by side, but well apart; precaudals near together; the last far 



below end of lateral line; scales 39 or 40; D 12 or 13; A. 17 or 18; anal spots 



5 to G + G to 7. BENOITI, 860. 



hh. Anterolaterals not side by side, the first above and before second, touching lateral 



line. Scales 38 to 42; anals 5 to 7 -f 6; D. 12; A. 19 to 22. HYGOMII, 861. 



854. MYCTOPHUM PUNCTATUM, Bafinesque. 



Head 3| ; depth 4| ; eye 2. D. 12 ; A. 19; scales 41 to 45. Least depth 

 of tail f height of body. Greatest depth of head about f its length. 

 Distance between posterior margin of orbit and preopercular edge 

 i diameter of eye. Snout very short, with a very inconspicuous keel on 

 upper edge, its length scarcely i diameter of eye. Eye very large. Pre- 

 maxillary reaching almost to angle of preoperculum. Origin of dorsal 

 much nearer tip of snout than to root of caudal, the fin very short, the 

 length of its base equal to i that of head and less than of total ; its 

 origin over eleventh scale of lateral line, and vertical with origin of 

 ventral, below twelfth scale of lateral line, its length equal to that of 

 postorbital part of head ; adipose dorsal present, over antepenultimate 

 ray of anal ; anal origin under twenty-first scale of lateral line, its base 

 as long as head, and its longest ray equal to length of postorbital part 

 of head ; caudal rather small and deeply forked. Mediolateral photo- 

 phores 3, in straight, obliquely ascending line; anterolateral photophore 

 single; posterolateral single, over break in row of superanals and placed 

 considerably in advance of soft dorsal; precaudal photophores close 

 together. (Goode & Bean.) Warmer parts of the Atlantic; abundant 

 off the Grand Banks and from the Gulf Stream across to the Mediterra- 

 nean, (punctatus, spotted.) (Eu.) 



Myctophum punctatiim, RAFINESQUE, Indice d'lttiol. Siciliana, 56, pi. u, fig. 5, 1810, Palermo; 



GOODE & BEAN, Oceanic Ichthyology, 71, fig. 80, 1895. 

 Scopelus caninianus, CUVIER & VALENCIENNES, Hist. Nat. Poiss., xxn, 445, 1849, coast of Italy: 



GUNTHER, Cat., v, 409, 1864; RAFF/ELE, Mitt. Zobl. Stat., Naples, ix, pi. vn, fig. 4, 183 



1889; LiiTKEN, Vid. Med. Naturh. Forh., 207, 1891. 

 Scopelus miilleri, GOODE, Hist. Aquatic Animals, Sec. i, pi. 203, 1884. 



855. MYCTOPHUM AFFINE (Liitken). 



D. about 14; A. about 20; scales 43. Caudal spots 2; posterolateral lj 

 anal spots about 8 + 6 in a right line; supra-anal spots 3, forming an 



