116 ' THE AMERICAN MUSEUM JOURNAL 
115, was prepared in the Museum under the direction of Dr. L. W. 
Williams, and represents the male cut so as to show the peculiar internal 
anatomy of the animal. It is about twice (linear) natural size. 
The Squid belongs to the Decapods, a subdivision of the Mollusks, 
and is closely related to the Octopus. ‘The species represented by the 
model averages more than a foot in length and is somewhat cigar- 
shaped. It has a distinct head, furnished with a single pair of eyes 
which are the most perfect found among invertebrates and closely re- 
semble the vertebrate eye itself, though originating in the embryo in a 
quite different way. The head is provided with a parrot-like beak, 
especially adapted for tearing flesh. The beak is set in a circular 
mouth surrounded by ten flexible arms, or tentacles, eight of which 
are of equal length and studded with suckers for grasping the ani- 
mal’s prey. The remaining two tentacles are much longer than the 
others and are without suckers, except on the club-shaped ends. ‘The 
surface of the body is entirely covered with clusters of reddish pigmented 
spots known as chromatophores. ‘These are ordinarily pale pink, but 
when the animal is excited, they become a deep red. 
Most animals of this group are provided with an 
in the case of the Cuttlefish (Sepia officinalis), secretes an intensely 
black fluid, the sepia of commerce. When the squid is startled, the 
“ink” is forcibly ejected from the body through a duct opening into the 
anus. ‘The ink mixes with the surrounding water to form a black cloud, 
under cover of which the animal escapes. 
The mode of progression of the Octopus and Squid is unique in the 
animal kingdom. ‘The body proper is inclosed on the lower side in a 
‘ 
‘ink-sae”’ which, 
“mantle cavity” to which water is freely admitted. At the entrance to 
this cavity is a flexible funnel or siphon with the small end pointing out- 
ward and forward. By filling the mantle-cavity with water and forcibly 
ejecting it through this funnel the animal is shot backward like a sky- 
rocket and at remarkable speed. When going forward, the mouth of 
the funnel is bent so as to shoot the stream of water backward. 
MUSEUM NEWS NOTES. 
Tue permanent endowment fund of the Museum has recently been 
increased by a gift of $10,000 from Mrs. J. B. Trevor, and by the pay- 
ment of a bequest of $25,000 from the estate of William P. Davis, Esq. 
