212
MALCOLM R. CLARKE
under the name Cheiroteuthis) Doratopsis stage) A, a specimen very
similar to C. (P) planctonica from near Durban, South Africa having a
mantle length of 0.6 cm.
2. Doratvpsis sagittcc Chun, 1908
Only known from Chun's two specimens (1908, 1910a) which were
measured in detail by Pfeffer (1912) this " species " was recovered
from the North Atlantic a t 14' 39"
21'61'W and the Indian Ocean
at 30°6'S 87'50'E. It was taken in open vertical nets fished to 1 800 m
and 2 500 m and the mantle lengths to the posterior end of the fin,
are 4.2 cm and 6-45 cm. (Pfeffer, 1912 found a discrepancy between
the text and the figures: the figures indicate a mantle length of 1.4
and 2.16 cm).
3. Chiroteuthis (Tankaia) borealis Sasaki, 1929
This is clearly a doratopsiform larval type and the six or eight
oblique rows of minute suckers on the tentacles suggest that it is a
larval form of a Mastigoteuthis species, possibly M . cordiforrnis which
has been recorded from Japanese waters (Sasaki, 1920, 1929a) i.e. from
the same region where the single specimen of C. (T.) borealis was taken.
The mantle length is 1.2 cm (including the broken tip of the pen).
4. Doratopsis lippula Chun, 1908
This has been taken from the Atlantic at 11'28's 10'24'E* and
31' 20" 34'56'W (Chun, 1908, 1910a, 1913). It was taken with open
nets fished to as much as 4000 m and one had a mantle length of
4.25 cm (calculated by Pfeffer, 1912 from Chun, 191Oa).
5. Doratopsis exophthalrnica Chun, 1908
Very similar to the previous species this has been taken at several
stations in the North Atlantic (Chun, 1908, 1910a, 1913; Massy, 1913,
1928a; Degner, 1925) and in the Indian Ocean (Chun, 1910a). A
damaged and doubtfully identified specimen was recorded from the
Chagos Islands (Robson, 1921). It has been taken with open nets
fished to as little as 100 m (200 m of wire out) (Chun, 1913) and to as
much as 2 500 m (Chun, 1910a). The mantle lengths range between
0.95 cm and 2.5 cm (Chun, 1910a).
6. Chiroteuthis = Doratopsis stage Joubin, 1931
fished to 100 m, this has a mantle length of 4.7 cm.
* Given erroneously &B ll"28'N by Chun.
Recovered near the Azores at 37' 44"
25'56'W in an open net
MALCOLM R. CLARKE
under the name Cheiroteuthis) Doratopsis stage) A, a specimen very
similar to C. (P) planctonica from near Durban, South Africa having a
mantle length of 0.6 cm.
2. Doratvpsis sagittcc Chun, 1908
Only known from Chun's two specimens (1908, 1910a) which were
measured in detail by Pfeffer (1912) this " species " was recovered
from the North Atlantic a t 14' 39"
21'61'W and the Indian Ocean
at 30°6'S 87'50'E. It was taken in open vertical nets fished to 1 800 m
and 2 500 m and the mantle lengths to the posterior end of the fin,
are 4.2 cm and 6-45 cm. (Pfeffer, 1912 found a discrepancy between
the text and the figures: the figures indicate a mantle length of 1.4
and 2.16 cm).
3. Chiroteuthis (Tankaia) borealis Sasaki, 1929
This is clearly a doratopsiform larval type and the six or eight
oblique rows of minute suckers on the tentacles suggest that it is a
larval form of a Mastigoteuthis species, possibly M . cordiforrnis which
has been recorded from Japanese waters (Sasaki, 1920, 1929a) i.e. from
the same region where the single specimen of C. (T.) borealis was taken.
The mantle length is 1.2 cm (including the broken tip of the pen).
4. Doratopsis lippula Chun, 1908
This has been taken from the Atlantic at 11'28's 10'24'E* and
31' 20" 34'56'W (Chun, 1908, 1910a, 1913). It was taken with open
nets fished to as much as 4000 m and one had a mantle length of
4.25 cm (calculated by Pfeffer, 1912 from Chun, 191Oa).
5. Doratopsis exophthalrnica Chun, 1908
Very similar to the previous species this has been taken at several
stations in the North Atlantic (Chun, 1908, 1910a, 1913; Massy, 1913,
1928a; Degner, 1925) and in the Indian Ocean (Chun, 1910a). A
damaged and doubtfully identified specimen was recorded from the
Chagos Islands (Robson, 1921). It has been taken with open nets
fished to as little as 100 m (200 m of wire out) (Chun, 1913) and to as
much as 2 500 m (Chun, 1910a). The mantle lengths range between
0.95 cm and 2.5 cm (Chun, 1910a).
6. Chiroteuthis = Doratopsis stage Joubin, 1931
fished to 100 m, this has a mantle length of 4.7 cm.
* Given erroneously &B ll"28'N by Chun.
Recovered near the Azores at 37' 44"
25'56'W in an open net