200
m a o m R. ULARKE
there seems to be a change in growth at a mantle length of 1.0-3.0 cm
after which growth of these organs is isometric up to 9.0 cm in mantle
length (Fig. 39). Changes in the arrangement of photophores round
the eye opening have been described (Degner, 1922, 1925). The largest
male among the " verified " specimens is 9.0 cm in mantle length, the
largest female is 8.7 cm (Voss and Voss, 1962) and the largest unsexed
specimen is 10.0 cm (Morales, 1958).
The ova of a mature female measured 0.38 x 0.47 mm.
Degner (1925) found that close to 70% of Mediterranean specimens
were less than 0.5 cm in mantle length in both winter and summer
and both seasons yielded specimens of 0.2-0.25 cm in mantle length
and this suggests spawning through the year. Young specimens 0.20.35 cm were always caught within 650 km of land or under 310 km
from the 200 m line; possibly suggesting spawning on the continental
slope.
The species has been taken from Alepisaurus stomachs on several
occasions (Voss and Voss, 1962).
10. Calliteuthis separata Sasaki, 1915b
This is probably a valid species although it was considered a possible
synonym of C. meleagroteuthis Chun, 1910, by Voss (1963a). First
recorded from Japan (Sasaki, 1915b, 1916, 1929a) squids thought to
belong to this species form a permanent item in the diet of Sperm
whales caught both north and south of the Kuril island chain (Akimushkin, 1954a, 1957). Sasaki's (1915b) specimen came from about 800 m,
was a male, and had a mantle length of 3.1 cm.
XVI. CHIROTEUTHIDAE
(J : A
This family contains two major groups, the Chiroteuthinae, the
species of which are almost all in the genus Chiroteuthis and the
Mastigoteuthinae containing the single genus Mastigoteuthis. The
genera Grimalditeuthis and Lepidoteuthis are very close to some members of the family (Clarke and Maul, 1962) but should perhaps be
regarded as representatives of two other families. It has long been
known that some, if not all, Chiroteuthis species undergo a considerable
change in proportions at a relatively large size. Before this was recognized (Ficalbi, 1899) many larval forms were named as species in the
genus Doratopsis and this genus has remained a useful repository for any
larval forms which could not be related to an adult Chiroteuthis.
Joubin (1931), while admitting the larval character of many Doratopsis
species, held that some species retain this form through life and that the
m a o m R. ULARKE
there seems to be a change in growth at a mantle length of 1.0-3.0 cm
after which growth of these organs is isometric up to 9.0 cm in mantle
length (Fig. 39). Changes in the arrangement of photophores round
the eye opening have been described (Degner, 1922, 1925). The largest
male among the " verified " specimens is 9.0 cm in mantle length, the
largest female is 8.7 cm (Voss and Voss, 1962) and the largest unsexed
specimen is 10.0 cm (Morales, 1958).
The ova of a mature female measured 0.38 x 0.47 mm.
Degner (1925) found that close to 70% of Mediterranean specimens
were less than 0.5 cm in mantle length in both winter and summer
and both seasons yielded specimens of 0.2-0.25 cm in mantle length
and this suggests spawning through the year. Young specimens 0.20.35 cm were always caught within 650 km of land or under 310 km
from the 200 m line; possibly suggesting spawning on the continental
slope.
The species has been taken from Alepisaurus stomachs on several
occasions (Voss and Voss, 1962).
10. Calliteuthis separata Sasaki, 1915b
This is probably a valid species although it was considered a possible
synonym of C. meleagroteuthis Chun, 1910, by Voss (1963a). First
recorded from Japan (Sasaki, 1915b, 1916, 1929a) squids thought to
belong to this species form a permanent item in the diet of Sperm
whales caught both north and south of the Kuril island chain (Akimushkin, 1954a, 1957). Sasaki's (1915b) specimen came from about 800 m,
was a male, and had a mantle length of 3.1 cm.
XVI. CHIROTEUTHIDAE
(J : A
This family contains two major groups, the Chiroteuthinae, the
species of which are almost all in the genus Chiroteuthis and the
Mastigoteuthinae containing the single genus Mastigoteuthis. The
genera Grimalditeuthis and Lepidoteuthis are very close to some members of the family (Clarke and Maul, 1962) but should perhaps be
regarded as representatives of two other families. It has long been
known that some, if not all, Chiroteuthis species undergo a considerable
change in proportions at a relatively large size. Before this was recognized (Ficalbi, 1899) many larval forms were named as species in the
genus Doratopsis and this genus has remained a useful repository for any
larval forms which could not be related to an adult Chiroteuthis.
Joubin (1931), while admitting the larval character of many Doratopsis
species, held that some species retain this form through life and that the