COPEPODS GATHERED BY ALBATROSS—WILSON 177 
were at first assigned to the genus Pontella, but the fifth legs shown 
in the accompanying figure prove that they really belong to this genus 
and species. 
Genus CALANUS Leach, 1819 
CALANUS CRISTATUS Kre¢gyer 
Calanus cristatus Kr@YER, Voy. Comm. sci. Nord Scandinavie ... la corvette 
La Recherche, Atlas, pl. 41, 1842-45; Naturh. Tidsskr., Kjgbenhavn, ser. 2, 
vol. 2, pp. 546, 553, 1848; p. 607, 1849. 
Stations 31; 33; 35; 37; 38; 41-44; 46; 48-50; 51; 52; 57; 60; 
2859; 2861; 38602; 4747; 4757-4760; 4763; 4765; 4766; 4781; 4785; 
4793; 4805; 4806; 5030; H. 1689; H. 2700. These stations for the 
greater part are in Alaskan waters and in the Bering and Okhotsk 
seas; three stations lie off the west coast of the United States; only 
one or two specimens were obtained at each station except 4793, where 
50 were captured. Until very recently, this species has been a puzzle 
to investigators, since no adults of either sex could be found. The 
present author has handled many hundreds of specimens, but they 
always proved to be females in the last copepodid stage. This was 
true of the Carnegie specimens and of this Albatross material. But 
in November 1937 a vertical haul] in the deep waters of Sagami Bay 
in northern Japan was found to contain adults of both sexes, which 
have been described by Dr. Otohiko Tanaka (1938, p. 599), of the 
Mitsui Institute of Marine Biology, near Simoda, Izu. The fifth 
legs in both sexes have 3-segmented rami, and the right fifth leg in 
the male is modified as in other males of the genus. The frontal crest, 
so prominent in the immature female, is retained in the adult form 
but almost entirely disappears in the mature male. The species 
founded and maintained upon a late developmental stage for nearly 
a century now becomes fully established. 
CALANUS FINMARCHICUS (Gunnerus) 
Monoculus finmarchicus GUNNERUS, Skrifter Kjdbenhavnske Selskab., vol. 10, 
p. 175, figs. 20-28, 1765. 
Stations 12; 18; 29; 33-35; 87; 88; 41; 42; 46; 48-50; 52; 57; 2770; 
2859 s 2861 ; 3602 ; 3696 ; 4655 ; 4673; 4753; 4756-4760 ; 4762; 4767 ; 4785; 
4800; 4806; 5080; 5655; H. 1689; H. 2701; Amchitka Island; Behm 
Canal; Yes Bay, Alaska. This is the best known and most widely 
distributed copepod in northern latitudes and is found in all of the 
plankton lists except the Siboga. Because of its size and the enor- 
mous numbers it attains in favorable localities it becomes of great 
economic importance as a food supply for many fishes and even for 
some whales. 
