278 
head, and unite so as eventually to throw the mouth nearly 
in the centre of the arms" (Huxley).* It is worthy of 
notice that the edges of the funnel are free in the embryo 
Dibranchiates, a condition which is persistent in the Nautilus. 
HABITS. 
Woodward, speaking of the distribution and habits of the 
Cuttle Fish, says : "They are generally nocturnal, or crepus- 
cular animals, concealing themselves during the day, or re- 
tiring to a lower region of the water. They inhabit every 
zone, and are met with near shore, as well as in the open 
sea, hundreds of miles from land. They attain, occasionally, 
a much greater size than any other Mollusca. MM. Quoy 
and Gaimard found a dead Cuttle Fish in the Atlantic, 
under the equator, which must have weighed 2 cwt. when 
perfect; it was floating on the surface, and was partly 
devoured by birds. Banks and Solander also met with one 
under similar circumstances in the Pacific, which was esti- 
mated to have measured six feet in length. From their 
habits it is difficult to capture some species alive, but they are 
frequently obtained uninjured from the stomachs of dolphins 
and other cetaceans which feed upon them." 
DISTRIBUTION. 
The Cephalopoda occur in all seas, and in every quarter of 
the globe. The Argon auta are found in both hemispheres, 
ranging between 40 degrees on both sides of the equator ; 
on the other hand, the Nautili appear to be confined to the 
waters of the tropical regions of the Pacific and Indian Oceans. 
The distribution of the Cephalopoda in time is a subject of 
• For Embryology, seo " Zur Entwickcluugsgoschichto dcr Cephalopoden," 
Grenachcr, 1876. " Observations on the (lovobtiiniont of the Ccphalopodn,'' Lan- 
koster, ("Qunrterley Journal of Microscopical Science, 187').'') "Rechcrches sur 
rerabryogcnio des Sepioles," P. J. Van Bencdcn, Brux. 1841. " Eutwickelungsge- 
scbichte der Cephalopoden," Dr Albert KoUiker, Zurich, 1814. 
