Jordan and Evermann. fishes of North America. 563 



848. NANNOBRACHIUM MEXICANUM (Gilbert). 



Head 3 ; depth 5| ; eye 4 to 4 in head ; snout 6J. D. 12 ; A. 14; scales 

 30 to 33 ; gill rakers 5 -f- 10. Caudal spots 3, the last one widely sepa- 

 rated from the others and above end of lateral line; anal spots 6-f-6; 

 posterolateral spots present, the uppermost on lateral line ; 3 supra-anal 

 spots in a series, 4 spots on course of lateral line and about equally dis- 

 tant j these are the upper pectoral, supraventral, upper supra-anal, and 

 posterolateral spots ; no spot before eye. Photophores all small ; tail 

 with luminous glands above and below. Body slender, the eye rather 

 small, the snout, comparatively acute; snout not projecting, the jaws 

 equal ; maxillary 1J in head ; scales very deciduous. Pectorals minute, 

 of 3 or 4 rays only. Last ray of dorsal over fourth of anal. Length 2 

 inches. Coast of Lower California. 



~M[icti>ltn>n mexicanum, GILBERT, Proc. U. S. Nat. Mus., 1890, 51, Albatross stations 3008 

 and 3009, Lower California. (Type, No. 44289. Coll. Albatross.) 



844. NANNOBRACHIIJM REGALE (Gilbert). 



Head 3| ; depth 5J- ; eye 5 to 5f. D. 16; A. 19 ; scales 37; gill rakers 

 5 -f- 10. Caudal spots 3 or 4, the last near end of lateral line, well sepa- 

 rated from the others; anal spots 11 -f- 7 ; ventral spots 3 ; posterolateral 

 spot present ; a supra-anal spot halfway between vent and lateral line ; a 

 phosphorescent streak on caudal peduncle above and below. Body rather 

 elongate, with stout caudal peduncle ; snout pointed, lower jaw project- 

 ing beyond it ; preopercular margin very oblique ; eye small, slightly 

 longer than snout ; teeth on vomer evident. Scales entire, large, very 

 deciduous, those along lateral line much larger. Front of dorsal slightly 

 nearer adipose fin than eye, its origin over axil of ventrals : insertion of 

 anal under its twelfth ray; last ray of dorsal over sixth of anal. Pecto- 

 rals very slender, with 14 rays, the upper filamentous and produced to 

 opposite base of ventrals ; ventrals reaching vent. Black. Length 5 

 inches. Santa Barbara Channel in 600 to 820 fathoms, (regalis, royal.) 



Myctophum regale, GILBERT, Proc. U. S. Nat. Mus., 1891, 544, Santa Barbara Channel. (Type, 

 No. 44289. Coll. Albatross.) 



845. NANNOBRACHIUM MACDONALDI, Goode & Bean. 



Head 3; depth 5. D. 13; A. 16 or 17; scales 4-35-4. Eye moderate, 

 5 in head, and considerably greater than snout. Mouth extremely wide, 

 rather oblique. Premaxillary as long as maxillary ; both bones narrow 

 and rod-shaped. Gill lamina; very short ; gill rakers long, needle- 

 shaped, the longest a little longer than eye. Origin of dorsal nearer 

 extremity of snout than root of caudal, its last ray opposite fourth or 

 fifth ray of anal, while the origin of anal is opposite tenth ray of dorsal; 

 the longest ray of the latter equal to length of head without snout ; 

 adipose fin small, opposite penultimate ray of anal ; caudal much forked ; 

 pectoral composed of 3 or 4 small, short, delicate rays; ventral inserted 

 slightly in advance of dorsal, and extending to vent. Phosphorescent 

 organs arranged much as in N. nigrum. The glandular organ of white 

 upon the top of the caudal peduncle much smaller than that described 



