64
THE BIOLOUY OF EUPHAUSIIDS
This species is restricted to the Antarctic south of the Antarctic
Convergence and has a circumpolar distribution (Fig. 20). It is most
common in the high latitude coastal current in the East Wind zone and
in the low latitude oceanic current from the Weddell Sea, and also in
the regions of the Bransfield Strait and South Georgia. Its northern
limit a t the Antarctic Convergence coincides with the southern limit of
E. vallentini (Fig. ZO), that is between 50"s and 60"s. It is a surface
species, living above 250 m during the day and often swarming a t the
surface. Length as great as 50 to 60 mm. (Marr, 1962 ; Baker, 1965.)
Euphausia vallentini Stebbing, 1900
E . walbentini Stebbing, 1900 : 545, pl. xxxvii ; Holt and Tattersall, 1906b : 1-3 ;
Tattersall, 190% : 13, pl. iv, figs. 4-6 ; 1924: 21 ; Hansen, 1913 : 32, pl. v, fig. 1,
a-f; Zimmer, 1914: 427 ; 1915 : 178 ; Illig, 1930 : 76 ; Hardy and Gunther, 1935 :
217-219, fig. 9 4 ; John, 1936: 211-214, figs. 12-14, 30b. E. spbendens Sam, 1885:
80-82, pl. xiii, figs. 7-17 (partim). E. patacho.nica Colosi, 1917b : 187-188, pl. xiv,
This is a circumpolar species restricted to the subantarctic zone
whose southern limit of distribution is the Antarctic Convergence
(50'5 to 60"s) and whose northern limit is the subtropical convergence
(Fig. 20). A single specimen has been caught off the eastern South
American coast as far north as 32'15'5 50'14'W ; all other records are
south of 40"s. Probably occurs mainly between 250m and l o o m ,
rising to the surface a t night. Sexually mature a t 15 to 25 mm, maximum size about 28 mm. (Hansen, 1911 ; Zimmer, 1915; Tattersall,
1924; Illig, 1930; Rustad, 1930; John, 1936; Boden, 1954; Bary, 1956;
Brinton, 1962a; Baker, 1965.)
figs. 11-14, PI. XV, figs. 15-20.
Euphausia lucens Hansen, 1905
E . lucens Hansen, 1905a : 9 ; 1911 : 26-27, fig. 8 ; 1915 : 84 ; Tattersall, 1913 :
876 ; 1924 : 19 ; 1925 : 6 ; Zimmer, 1915 : 178-179 ; Colosi, 1917b : 183-186, pl. xiv,
figs. 6-8 ; Illig, 1930 : 499 ; Hardy and Gunther, 1935 : 208 ; John, 1936 : 205-209,
figs. 7-11, 30a. E. splendens Sars, 1885: 80-82, pl. xiii, figs. 7-17 (partim).
E. uncinata Colosi, 1917b : 186-187, pl. xiv, figs. 9-10.
The distribution of this species is not yet fully known (Fig. 21). It
is circumpolar in the southern temperate waters south of about 30"s.
It is not an abundant species and is possibly more or less restricted to
the region north of the Antarctic Convergence although it has been
recorded south of it. John found it as far south as the Antarctic
Convergence but Baker did not find it farther south than 45"s.
Consequently, more information is required to define its distribution.
Length 10-18 mm. (Hansen, 1911, 1915; Tattersall, 1913, 1924, 1925;
Zimmer, 1915; Illig, 1930; Rustad, 1930; John, 1936; Boden, 1954;
THE BIOLOUY OF EUPHAUSIIDS
This species is restricted to the Antarctic south of the Antarctic
Convergence and has a circumpolar distribution (Fig. 20). It is most
common in the high latitude coastal current in the East Wind zone and
in the low latitude oceanic current from the Weddell Sea, and also in
the regions of the Bransfield Strait and South Georgia. Its northern
limit a t the Antarctic Convergence coincides with the southern limit of
E. vallentini (Fig. ZO), that is between 50"s and 60"s. It is a surface
species, living above 250 m during the day and often swarming a t the
surface. Length as great as 50 to 60 mm. (Marr, 1962 ; Baker, 1965.)
Euphausia vallentini Stebbing, 1900
E . walbentini Stebbing, 1900 : 545, pl. xxxvii ; Holt and Tattersall, 1906b : 1-3 ;
Tattersall, 190% : 13, pl. iv, figs. 4-6 ; 1924: 21 ; Hansen, 1913 : 32, pl. v, fig. 1,
a-f; Zimmer, 1914: 427 ; 1915 : 178 ; Illig, 1930 : 76 ; Hardy and Gunther, 1935 :
217-219, fig. 9 4 ; John, 1936: 211-214, figs. 12-14, 30b. E. spbendens Sam, 1885:
80-82, pl. xiii, figs. 7-17 (partim). E. patacho.nica Colosi, 1917b : 187-188, pl. xiv,
This is a circumpolar species restricted to the subantarctic zone
whose southern limit of distribution is the Antarctic Convergence
(50'5 to 60"s) and whose northern limit is the subtropical convergence
(Fig. 20). A single specimen has been caught off the eastern South
American coast as far north as 32'15'5 50'14'W ; all other records are
south of 40"s. Probably occurs mainly between 250m and l o o m ,
rising to the surface a t night. Sexually mature a t 15 to 25 mm, maximum size about 28 mm. (Hansen, 1911 ; Zimmer, 1915; Tattersall,
1924; Illig, 1930; Rustad, 1930; John, 1936; Boden, 1954; Bary, 1956;
Brinton, 1962a; Baker, 1965.)
figs. 11-14, PI. XV, figs. 15-20.
Euphausia lucens Hansen, 1905
E . lucens Hansen, 1905a : 9 ; 1911 : 26-27, fig. 8 ; 1915 : 84 ; Tattersall, 1913 :
876 ; 1924 : 19 ; 1925 : 6 ; Zimmer, 1915 : 178-179 ; Colosi, 1917b : 183-186, pl. xiv,
figs. 6-8 ; Illig, 1930 : 499 ; Hardy and Gunther, 1935 : 208 ; John, 1936 : 205-209,
figs. 7-11, 30a. E. splendens Sars, 1885: 80-82, pl. xiii, figs. 7-17 (partim).
E. uncinata Colosi, 1917b : 186-187, pl. xiv, figs. 9-10.
The distribution of this species is not yet fully known (Fig. 21). It
is circumpolar in the southern temperate waters south of about 30"s.
It is not an abundant species and is possibly more or less restricted to
the region north of the Antarctic Convergence although it has been
recorded south of it. John found it as far south as the Antarctic
Convergence but Baker did not find it farther south than 45"s.
Consequently, more information is required to define its distribution.
Length 10-18 mm. (Hansen, 1911, 1915; Tattersall, 1913, 1924, 1925;
Zimmer, 1915; Illig, 1930; Rustad, 1930; John, 1936; Boden, 1954;