Notes from the San Diego Biological Laboratory. 125 



with a rounded margin. Maxillary considerably dilated behind, 

 about ij4 to ifi in head. 

 Scales entire. 



Origin of dorsal fin much nearer tip of snout than to origin of 

 caudal; base of dorsal 2^ in distance from base of middle 

 caudal rays to last dorsal ray. Adipose fin equidistant 

 from caudal and dorsal. Ventrals about reaching vent; pectorals 

 not to second third of ventrals. 



Phosphorescent spots placed as follows: One on each ramus 

 of the mandible below the anterior margin of the eye; two on 

 each side of the gill membrane, the first below the posterior 

 margin of the pupil, the second below the end of the maxillary; 

 one just behind the margin of the pre-opercle near the maxillary; 

 another between the opercle and sub-opercle just behind the pre- 

 opercle; five pairs on breast, four pairs between ventrals and 

 anal; eleven pairs along the anal; four or five pairs along the 

 caudal peduncle; two pairs on caudal peduncle behind the first 

 accessory ray of the caudal; one just below the twenty-seventh 

 scale of the lateral line, another just below the eighteenth scale; 

 one midway between the latter and the last of the abdominal 

 pairs; one about midway between the lateral line and second pair 

 of the abdominal series, another similarly placed above the ven- 

 trals, one on lower margin of base of pectoral; one just above the 

 second of the breast pairs, and another above this near the lateral 

 line; the three last forming an isosceles triangle. Caudal ped- 

 uncle superiorly with six large phosphorescent spots which in our 

 specimens appear as white fatty spots. Black, the sides lighter, 

 with numerous black dots. All the scales which are present 

 and the head strongly coerulescent or steel blue. Pectoral 

 smutty at base; dorsal, ventrals and anal white. Caudal white, 

 with black cross lines. 



5. *Myctophum townsendi sp. nov. Several specimens, the 

 longest .09 m.from forty-five fathoms. These specimens were col- 

 lected with those of M. californiense. 



D. 13-14; A. 14-15; lat. 1. about 35; depth 4^-5; head 3-3%. 



Similar in form to M. californiense, the head longer, the caudal 

 peduncle deeper, the eye infringing less on the profile. Depth 

 of caudal peduncle little more than two in the greatest depth. 



Head long, its depth about one and two-thirds in its 

 length. Eye large, with broader supraorbitals than in califor- 

 niense. Nasal ridge long and very high. Eye 3^3 in head, 

 interorbital somewhat wider than an orbital diameter, opercles 

 as in californiense; maxillary not dilated behind, 1% in head. 



Origin of dorsal about equidistant from tip of snout and first 

 caudal fulcrum ; base of dorsal somewhat more than two in the 

 distance from middle caudal rays to last dorsal ray. Highest dorsal 

 ray about two in head. Ventrals reaching vent. Pectorals nar- 

 row, reaching origin of anal. 



Several recurved spines on caudal peduncle above and below. 

 Phosphorescent spots of the head as in californiense, the spots in 



