gilbert: the lantern-fishes of japan 103 



Luminous scales confined to the caudal peduncle, three on the dorsal side, 

 four ventrally. No minute accessory photophores. 



Only the type known; deposited in the U. S. National Museum. 



29. Lampanyctus punctatissimus sp. nov. 



Type 20 mm. long to base of caudal fin, which is mutilated, so the total 

 length cannot be ascertained. Albatross Station 5064, Suruga Bay, Japan, 

 intermediate net at 300 fathoms. 



Closely allied to L. alatus, differing in the presence of a spot on shoulder 

 and a luminous scale before the adipose, and in the shorter pectoral fin. 



Measurements in hundredths of length without caudal fin: Length of 

 head 32; diameter of eye 5; length of snout 5; length of maxillary 24; depth of 

 body 20; least depth of caudal peduncle 7; distance from tip of snout to front 

 of dorsal 48; to front of ventrals 46; to front of anal 60; to last dorsal ray 62. 



Dorsal rays 12; anal rays 17; pectoral rays 12; ventral rays 8. Scales of 

 lateral line 34. 



Snout short, but not rounded; a depression over front of eyes; middle of 

 maxillary under posterior border of eye. 



Origin of dorsal behind base of ventrals, its last ray about over the fifth 

 of the anal. Pectoral more or less mutilated in all our specimens, but appar- 

 ently not extending much if any beyond the front of the anal. 



PJioto-phores. — A well-developed spot on middle of cheek and one somewhat 

 smaller on the shoulder. Suprapectoral very near the lateral line; upper infra- 

 pectoral somewhat above the middle of the pectoral base, the lower infra- 

 pectoral below and behind it in a line joining the upper infrapectoral and the 

 second thoracic. Thoracics five, the fourth elevated, over the space between the 

 third and fifth, on a level with middle of pectoral base. The second thoracics 

 are about midway between the first and fifth pairs, the third nearer the second 

 than the fifth. The second and third pairs are but little farther from mid- 

 ventral line than the first pair, but the fifth are out at the sides in front of the 

 outer ventral rays. The supraventral, upper supra-anal, posterolateral and upper 

 precaudal are equally elevated and are near the lateral line but not in contact 

 with it. Ventrals four, none of them elevated. Supra-anals forming a right angle, 

 the anterior somewhat more elevated than the middle one, over the interspace 

 between the second and third ventrals. Antero-anals seven, the posterior elevated, 

 the first six on the same level. Postero-anals continuous with the precaudals, but 

 a slight widening of the spacing seems to indicate that the precaudals are four in 



