3. DISTRIBUTION AND SYNONYMY
67
&-c; Zimmer, 1914: 426, pl. xxvi, figs. 60-64; Mackintosh, 1934; Hardy and
Gunther, 1935: 218; John, 1936: 220-223, figs. 17, 300; (nec Illig, 1930: 500,
fig. 182).
This species is the only neritic species of this genus found in the
Antarctic (Fig. 21). It is usually confined to the region south of the
northern limits of the pack-ice, about 65"s. Length 30 mm. (Hansen,
1908b; Rustad, 1930, 1934; Brinton, 1962a; Baker, 1965.)
Euphausia tenera Hansen, 1905
E . gracilis G. 0. Sam, 1885 : 89-91, pl. xv, figs. 12-23 ; (nec E . gracilis Dana.
1852: 644). E . tenera Hansen, 1905b: 9 ; 1910: 95-97, pl. xiv, fig. 3, a-e;
Boden et al., 1955 : 335-337, fig. 25.
It occurs in the tropical and subtropical Atlantic, Pacific and Indian
Oceans (Fig. 21). Atlantic: extends in the western Atlantic from
about 40"N southwards to the Caribbean and eastern coast of South
America to about 20"s. It has not been found north of about 20"N in
the eastern Atlantic but occurs southwards to South Africa, 40"s.
Pacific : found between 40"N and 35"s in the western Pacific, between
23"N and 28"s in the eastern Pacific, including the Gulf of California.
Indian : occurs south of about 15"N extending to about 20"s off eastern
Madagascar and to 33"s off Western Australia. Depth of occurrence
seems to vary ; found between 300 m and 500 m off Baja California but
above 280 m east of Japan. Migrates to above 140 m depth at night.
Length 8-9 mm. (Ortmann, 1893 ; Tattersall, 1913, 1924, 1925, 1927,
1936c, 1939; Hansen, 1915, 1916; Illig, 1930; Leavitt, 1935, 1938;
Moore, 1949, 1950, 1952; Lebour, 1950; Boden, 1954, 1961a; Lewis,
1954; Evans, 1961; LegarB, 1961; Brinton, 1962a; Grice and Hart,
1962; Ponomareva, 1963, 1964; Baker, 1965.)
Euphausia sirnilis G. 0. Sars, 1883
E. sirnilis G. 0. Sars, 188313: 13; 1885: 79-80, pl. xiii, figs. 1-6; Hansen,
1913 : 29, pl. iv, fig. 3, a-e ; John, 1936 : 233-236, figs. 24-26 ; Boden et al., 1955 :
This species occurs in the North Pacific, South Pacific, Atlantic and
Indian Oceans (Fig. 22). Atlantic: found between 30"s and 55"s.
Pacific : in the west it extends northwards through the South China and
East China Seas, and eastwards of Japan in the Kuroshio Extension.
It is not present off the northeast coast of Australia but is found off the
southern and southeastern coasts extending eastwards across the
Pacific between about 30"s and 50" to 60"s. Indian: present in the
Arabian Sea south of about 12"N but north of 5"S, except off northern
Madagascar. It appears to be absent in the Indian Ocean from the area
337-339, fig. 26.
67
&-c; Zimmer, 1914: 426, pl. xxvi, figs. 60-64; Mackintosh, 1934; Hardy and
Gunther, 1935: 218; John, 1936: 220-223, figs. 17, 300; (nec Illig, 1930: 500,
fig. 182).
This species is the only neritic species of this genus found in the
Antarctic (Fig. 21). It is usually confined to the region south of the
northern limits of the pack-ice, about 65"s. Length 30 mm. (Hansen,
1908b; Rustad, 1930, 1934; Brinton, 1962a; Baker, 1965.)
Euphausia tenera Hansen, 1905
E . gracilis G. 0. Sam, 1885 : 89-91, pl. xv, figs. 12-23 ; (nec E . gracilis Dana.
1852: 644). E . tenera Hansen, 1905b: 9 ; 1910: 95-97, pl. xiv, fig. 3, a-e;
Boden et al., 1955 : 335-337, fig. 25.
It occurs in the tropical and subtropical Atlantic, Pacific and Indian
Oceans (Fig. 21). Atlantic: extends in the western Atlantic from
about 40"N southwards to the Caribbean and eastern coast of South
America to about 20"s. It has not been found north of about 20"N in
the eastern Atlantic but occurs southwards to South Africa, 40"s.
Pacific : found between 40"N and 35"s in the western Pacific, between
23"N and 28"s in the eastern Pacific, including the Gulf of California.
Indian : occurs south of about 15"N extending to about 20"s off eastern
Madagascar and to 33"s off Western Australia. Depth of occurrence
seems to vary ; found between 300 m and 500 m off Baja California but
above 280 m east of Japan. Migrates to above 140 m depth at night.
Length 8-9 mm. (Ortmann, 1893 ; Tattersall, 1913, 1924, 1925, 1927,
1936c, 1939; Hansen, 1915, 1916; Illig, 1930; Leavitt, 1935, 1938;
Moore, 1949, 1950, 1952; Lebour, 1950; Boden, 1954, 1961a; Lewis,
1954; Evans, 1961; LegarB, 1961; Brinton, 1962a; Grice and Hart,
1962; Ponomareva, 1963, 1964; Baker, 1965.)
Euphausia sirnilis G. 0. Sars, 1883
E. sirnilis G. 0. Sars, 188313: 13; 1885: 79-80, pl. xiii, figs. 1-6; Hansen,
1913 : 29, pl. iv, fig. 3, a-e ; John, 1936 : 233-236, figs. 24-26 ; Boden et al., 1955 :
This species occurs in the North Pacific, South Pacific, Atlantic and
Indian Oceans (Fig. 22). Atlantic: found between 30"s and 55"s.
Pacific : in the west it extends northwards through the South China and
East China Seas, and eastwards of Japan in the Kuroshio Extension.
It is not present off the northeast coast of Australia but is found off the
southern and southeastern coasts extending eastwards across the
Pacific between about 30"s and 50" to 60"s. Indian: present in the
Arabian Sea south of about 12"N but north of 5"S, except off northern
Madagascar. It appears to be absent in the Indian Ocean from the area
337-339, fig. 26.