106 MEMOIRS OF THE CARNEGIE MUSEUM 



Two cotypes were secured at Albatross Station 5039, off the southern shore 

 of Hokkaido (42° 11' N., 141° 57' E.); depth at bottom 269 to 326 fathoms. 

 Type deposited in the Carnegie Museum. 



Named for David Starr Jordan in appreciation of his epoch-making re- 

 searches on the fish-fauna of Japan. 



31. Lampanyctus macropterus (Brauer). 

 Mtjctophum (Lampanyctus) macropterum Brauer, Zool. Anz., 1904, p. 404, fig. 5; 



Indian Ocean. 



A single specimen, 105 mm. long, was secured by the Albatross at Station 

 4951, near Kagoshima (31° 10' 30" N., 131° 58' 30" E.). The dredge was sent 

 down in 703 fathoms, but evidently failed to reach the bottom as the contents 

 were all deep pelagic, the failure obviously due to the swift currents of the 

 Kurosiwo. 



The specimen is larger than any of Brauer's types from the Indian Ocean, 

 and differs from his description and figure in the following respects: 



1. Only the first of the postero-anal photophores lies over the base of the 

 anal fin. 



2. The second of the ventral series is less elevated and more obliquely 

 placed with reference to the first ventral. It is distinctly below the line joining 

 the first and second supra-anals. 



3. Second and third antero-anals nearly equally elevated, though less so 

 than in L. jordani, both well above the level of the first, fourth, and fifth 

 antero-anals. Sixth antero-anal elevated, nearly midway between the fifth and 

 the posterolateral. 



4. The luminous scales completely cover the lower margin of caudal 

 peduncle and are eight in number. 



No spot on cheek, none above and behind upper pectoral ray, no accessory 

 spots on head or body, and no luminous scales before the adipose; differing in 

 these respects from L. jordani. 



Humeral spot unusually large, nearly equal in size to the spots on body. 

 Upper infrapectoral on level with upper pectoral rays. First supra-anal much 

 lower than the second, the line joining the two reaching lower profile in advance 

 of third thoracic, passing well above the second ventral. Anals six to nine. Dis- 

 tinctly four precaudals, the first and second dropped below the line of the postero- 

 anals, and separated from them by a slightly wider interspace. The third is 

 more elevated than in L. jordani, but is nearer the second than the fourth. 



