528 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 86 



Description. — (In this paragraph the proportions and counts of the 

 holotype are outside the parentheses and those of the paratypes in the 

 parentheses.) Dorsal rays 15 (14 to 16); anal rays 18 (17 to 19); 

 caudal rays 36 (33 to 38); pectoral rays 15 (14 to 15); pelvic rays 8 

 (8); scales in a lateral series 36 (36 to 39); AO 7+8 (6 to 8+7 to 8); 

 supracaudal luminous scales 4 (3 to 5). Infracaudal luminous scales 

 7 (5 to 8). Proportions of the length without caudal: Length of the 

 head 3.7 (1.3 to 3.8); snout to dorsal 2.1 (1.9 to 2.1); snout to adipose 

 1.3 (1.3 to 1.4); snout to ventrals 2.5 (2.1 to 2.5); snout to anal 1.8 

 (1.7 to 1.9); greatest depth 5.4 (5.0 to 5.9); length of caudal peduncle 

 4.7 (4.0 to 5.0). Proportions of the length of head: Diameter of eye 



FiOTTBE 66. — Lampanyctut micropunctatus, new sjjecies: Paratype, 85 mm long, from station 183C. 



5.4 (5.4 to 6.5); length of snout 4.7 (3.4 to 5.4); length of upper jaw 1.4 

 (1.1 to 1.4); depth of caudal peduncle 2.8 (2.7 to 3.8). 



The adipose fin is inserted over the last four rays of the anal. The 

 pectorals are inserted below the angle of the opercle. The base is 

 narrow; the rays are fine and filamentous, the middle ones reaching 

 beyond the bases of the ventrals. The ventrals are placed well ahead 

 of the origin of the dorsal. The anal originates under the tliird or 

 fourth from the last dorsal ray. 



All the photophores on the head and body are very small, those on 

 the head being especially degenerate. The antorbital is marked only 

 by a small bit of black pigment on the anterior edge of the orbit on a 

 level with the center of the eye. The customary row of photophores 

 under the mandible is only faintly visible through the covering skin. 

 The photophore at the angle of the jaw is a tiny dot; the one on the 

 operculum directly above it, and a httle above a horizontal line through 

 the upper pectoral rays, is larger but is only faintly seen through the 

 skin. There are no photophores on the cheek or on the shoulder. 

 The PLO is high, situated about one-fourth the distance from the lat- 

 eral line to the base of the pectoral, and only a httle posterior to a line 

 through the PVO and the second PO. The upper PVO is level with 

 the dorsal pectoral rays; the second lies halfway from the upper PVO 

 on a hne from that organ to the second PO. There are four PO, all 

 lying on the same level. The first lies under the edge of the branchios- 



