106 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



Sta. 2683. July 17, 1886. Lat. 39° 33' N.; long. 70° 50' W. 8 

 specimens. 



Sta. 1144. September 8, 1882. Lat. 39° 31' N.; long. 72° 06' W. 

 1 specimen. 



Sta. 2179. July 23, 1884. Lat. 39° 30' 10" N.; long. 71° 50' W. 

 1 specimen. 



Sta. 2095. September 30, 1883. Lat. 39° 29' N.; long. 70° 58' 

 40" W. Surface. Surf. temp. 69i°. 16 specimens. 



Sta. 2182. July 23, 1884. Lat. 39° 25' 30" N.; long. 71° 44' W. 



1 specimen. 



Sta. 2235. September 13, 1884. Lat. 39° 12' N.; long. 72° 03' 

 30" W. 10 specimens. 



Sta. 2236. September 13, 1884. Lat. 39° 11' N.; long. 72° 08' 

 30" W. Numerous specimens. 



Sta. 2104. November 5, 1883. Lat. 38° 48' N.; long. 72° 40' 30" 

 W. 6 specimens. 



Sta. 2203. September 12, 1884. Lat. 38° 27' N.; long. 73° 02' 

 W. 9 specimens. 



Sta. 2172. July 20, 1884. Lat. 38° 01' 15" N.; long. 73° 44' W. 



2 specimens. 



Sta. 2105. November 6, 1883. Lat. 37° 50' N.; long. 73° 03' 50" 

 W. Surface. Surf. temp. 63°. 1 specimen. 



Sta. 2098. October 1, 1883. Lat. 37° 40' 30" N.: long. 70° 37' 

 30" W. 7 specimens. 



Sta. 2229. September 11, 1884. Lat. 37° 38' 40" N.; long. 73° 

 16' 30" W. 12 specimens. 



Sta. 2728. October 25, 1886. Lat. 36° 30' N.; long. 71° 33' W. 

 Many specimens. 



The animals from the Pacific recorded by Ortmann in 1894 as 

 N. megalops G. O. Sars, I refer to the following species. 



Remarks. — Sars has published a detailed description with numer- 

 ous excellent figures of the female, but he had no male specimen. 

 In the female the third peduncular joint of the antennulse is a little 

 longer and conspicuously thinner than the second joint, while in 

 the adult male the third joint is a little shorter than, or at most 

 about as long as, the second and much thicker than in the female, 

 being as thick as the second joint, which also is a little shorter 

 and distinctly thicker than in the other sex. In both sexes the 

 frontal plate is a moderately small triangle conspicuously broader 

 than long; in the female this plate terminates in a very long and 

 very narrow, canaliculate and curved rostrum, which is totally 

 wanting in the male. Yet in very rare cases the male with the copu- 

 latory organs seemingly well developed has a rostrum as the female, 

 and I have seen a single female (from station 1137) without any 

 rostrum from the tip of the frontal plate. The copulatory organs 



