100 Messrs. Hancock and Ernbleton on the Anatomy of Eolis. 
The anterior aorta, fig. 2 f, passing forwards over the genital 
organs, and on the right side of the stomach, but on a plane below 
the ramifications of the digestive system, gives ofi" three or four 
small arteries, d e' e' e', to the stomach, and next from its under 
part a large branch j, which after sending ofi* some small twigs is 
distributed by two or three branches which ramify on the penis, 
testis, mucus-gland and ducts. The main trunk, after this, is 
bent down in front of the genital organs, passes under the oeso- 
phagus, and becomes applied to the under surface of the buccal 
mass n, on the median line, after having given an offset, k, for- 
wards to the anterior part of the oesophagus and upper surface 
of the buccal mass. Next, about half-way along the under sur- 
face of that fieshy organ, it gives off a large artery /, which pene- 
trates its floor at an aperture left between the muscular bundles, 
to supply the tongue and the interior of the mouth ; shortly 
after this, a branch springs on each side from the trunk ; these 
encircle the anterior part of the mass of the jaws just behind the 
lips, supplying the muscles that connect the mass to the skin, 
and the skin itself in the vicinity. Lastly, the anterior aorta 
terminates in three branches near m, which are distributed by 
twigs to the lips and the anterior part of the foot. 
The posterior aorta, /', runs a very short way forwards and 
then turns downwards and backwards, passing under the heart 
and gastric system ; at this turn, and as it runs backwards, it gives 
off four or five branches to the rectum, which lies on its right 
side : one branch to the rectum is sometimes given off from the 
common aorta just after it has perforated the pericardium. The 
artery then gains the inferior surface of the ovary, among the 
lobes of which it is at first partially imbedded. On entering this 
viscus it at once gives off twigs right and left to the contiguous 
lobes ; it next bifurcates, one branch passing on to be distributed 
by small lateral twigs to the middle and posterior lobes of the 
ovary, among which they can be seen to subdivide two or three 
times, accompanying the divisions of the oviduct ; the other going 
to the skin of the foot under the ovary ; seven or eight branches 
come off from it which penetrate the skin, and can be traced a 
little way dividing in its substance. 
Thus we can demonstrate arteries supplying almost all the 
viscera and a great portion of the skin of the foot, and show that 
they undergo minute division, and all the branches laid down in 
our Plate have been verified by repeated dissection : we have 
failed however in making out their mode of termination. We 
cannot undertake to say whether they end by closed extremities, 
or whether they have open mouths which communicate with 
lacunae or sinuses in the intervisceral spaces, or with those in the 
skin. The lacunae among the viscera we have not been able to 
make out by dissection, and have not made use of injections 
