76 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



Lat. 13° 33' 30" N.; long. 97° 57' 30" W. 8 p.m. Surface. 

 Large number of immature specimens. 



Sta. 3414. April 8, 1891. Lat. 10° 14' N.; long. 96° 28' W. 200-0 

 fathoms. Many specimens. 300-0 fathoms. 14 specimens. 



Sta. 3388. March 9, 1891. Lat. 7° 06' N.; long. 79° 48' W. 400-0 

 fathoms. 1 specimen. 



Sta. 3409. April 3, 1891. Lat. 0° 18' 40" N.; long. 90° 34' W. 

 Surface. Surf. temp. 82°. 1 specimen. 



Hyd. 2628. March 26, 1891. Lat. 0° 13' S.; long. 84° 52' W. 

 200-0 fathoms. 1 specimen. 



Distribution. — This species is known only from the East Pacific, 

 and according to the list above and the long list in the Harvard paper 

 it extends as far north as lat. 28° N. and south to about lat. 14 J° S. 



13. EUPHAUSIA DIOMEDE^E Ortmann (1894). 



1910. Euphausia diomedex H. J. Hansen, Siboga Exp., vol. 37, p. 91, pi. 13, 



figs. 4a-4e. 

 1912. Euphausia diomedex H. J. Hansen, Mem. Mus. Comp. Zool., vol. 35, No. 4, 



p. 235, pi. 7, fig. 4a. 



Occurrence. — Among the unnamed material, specimens were found 

 from two places in the tropical Pacific : 



September 9, 1899, Albatross, consequently about lat. 2° 38' N.; 

 long. 137° 22' W. Surface. 2 specimens. 



Sur. 26. April 3, 1888. Lat. 0° 30' S.; long. 88° 37' 30" W. Sur- 

 face. Light clouds, 7.35 p. m. Surf. temp. 80°. 12 specimens. 



Among the animals recorded by Ortmann as E. pellucida the fol- 

 lowing specimens belong to E. diomedex. 



Sta. 3414. April 8, 1891. Lat. 10° 14' N.; long. 96° 28' W. 100-0 

 fathoms. 3 specimens. About 200 fathoms. 2 specimens. 



March 7, 1891, consequently about lat. 6° 21' N.; long. 80° 41' W. 

 Surface. 8.30 p. m. Many specimens. 



Sta. 3412. April 4, 1891. Lat. 1° 23' N.; long. 91° 43' W. Sur- 

 face. Surf. temp. 82°. Many specimens. 



Sta. 3409. April 3, 1891. Lat. 0° 18' 40" K; long. 90° 34' W. 

 Surface. Surf. temp. 82°. 9 specimens. 



Remarks. — Ortmann's two type-specimens of E. diomedex were 

 taken at Station 3909. As shown in my papers quoted the charac- 

 ters applied by Ortmann for E. diomedex are in reality founded only 

 on a most remarkable and somewhat anomalous variation. His 

 two specimens were taken together with 9 normal specimens of the 

 same species, but these he referred to E. pellucida, which is a mixture 

 of several species well separated by excellent differences in the 

 antennulse and the copula tory organs. 



Distribution.- — As pointed out in my Harvard paper (pp. 235-237) 

 this species is known from the Red Sea and is widely distributed in 



