BREE SINS Pirie ORRSClIENCE 
ON THE LIFE HISTORY OF AN ECONOMIC CUTTLEFISH OF JAPAN 
23 
fishes. The plankton-feeding young are found most frequently in spring, 
with their mantle measuring below 85 mm. in length. 
(5) In warmer seas the principal pairing season continues from summer 
to winter, but in colder seas it occurs only in early winter. 
(6) The male sticks the spermatophores on the buccal membrane of the 
female, the membrane having about thirty seminal receptacles arranged in a 
circle around the mouth. 
(7) In warmer seas the principal spawning season occurs as a rule in 
autumn, even though the spawning may take place nearly all the year round. 
(8) It is highly probable that the eggs are deposited on the sea bottom and 
embedded in a gelatinous mass. 
(9) The artificially fertilized eggs which develop to a certain extent are 
much heavier than sea water and repose on the bottom of the basin. Their 
cleavage is partial, somewhat resembling that in Loligo. 
(10) The habit of the cuttlefish is to a large measure regulated by the 
hydrographic condition of the sea, changes of which stand in relation to the 
large or poor catch of the animal. 
BIBLIOGRAPHY 
I. BIOLOGY 
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1912, pp. 380-444, pls. v-ix; 4 textfigs. ~ 
DEAN, B. igor. Noteson Living Nautilus. Amer. Natural. XXXV, pp. 819-837; 15 textfigs. 
Dérinc, W. 1908. Ueber den Bau und Entwicklung des weiblichen Geschlechts-apparates bei 
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Girman, A.D. 1911. Sexual activities of the squid, Loligo pealii Les. 1. Copulation, egg-laying 
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GutarT, J. 1900. Les Méfaits du poulpe (Octopus vulgaris) en Bretagne. Bull. Soc. Zool. France, 
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Hornell, J. 1896. The Eggs and Young of Cephalopods. Journ. Mar. Zool. II, pp. 64-66, 1 pl. 
Hovis, W. E. 1886. Report on the Cephalopoda collected by H. M. S. Challenger during the 
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