Miscellaneous. 
243 
surface of the head, as in all the errant Cymothoadse, they occupy 
the lower surface and are placed beneath the frontal margin, on 
each side of the base of the antennee. 
In the form of the parts of the mouth Bathynomus approaches the 
Cirolcmi more than the other representatives of the same group ; in 
the arrangement of its legs it presents rememblunces to the above 
crustaceans and the genus AEya. But the organic characters which 
I have indicated above seem to me to be sufficiently important to 
separate Bathynomus from all other Isopods, and to place it in a 
new group of the family Cymothoadse, which I propose to name 
Cymothoadiens brancliiferes.—Comptes Rendus, January 6, 1879, 
p. 21. 
On the Termination of the Visceral Arterioles of Arion rufus. 
By M. S. Jouudaix. 
The author remarks that anatomists do not appear to have 
attempted by direct observation to ascertain the mode in which the 
blood of the arteries in mollusks flows into the visceral cavity. He 
says that if a fragment of one of the organs contained in the central 
cavity be separated by a tangential section and placed under the 
microscope, and the outer surface examined with a power of 200- 
250 diameters, the last ramifications of the arteries, the diameter of 
which is variable, are seen all to reach the free surface of the organ, 
where they terminate suddenly by a truncated and gaping extre¬ 
mity. It is through these orifices, which are nearly always funnel- 
shaped, that the arterial blood passes into the general cavity. In 
Arion the parts need not be injected, as very clear results may be 
obtained without any such precaution, owing to the calcareous cor¬ 
puscles, which incrust their walls as far as and including the free 
mouth. Similar orifices exist in many other Mollusca. 
The author thinks that this arrangement was perceived by Alder 
and Hancock, although its true interpretation escaped them. Their 
pi. iv. fig. 10 shows a close resemblance to his own drawings of the 
arterial orifices. It represents an enlargement of a terminal vesicle 
of the accessory salivary gland in Doto, and shows tubes ramifying 
after the fashion of arteries, and terminating at bodies which the 
English anatomists called nucleated cells. These are the funnel- 
shaped orifices of the arterial capillaries of the gland. Alder and 
Hancock were struck with the fact that the vasculiform tubes 
exactly correspond in diameter with the “ nucleiand they add in 
a note that the latter might be the apertures of small vessels. 
The author thinks that the orifices of the supposed aquiferous 
vessels of the Acephala and other Mollusca are anatomically' of the 
same nature as the arterial funnels described by him.— Comptes 
Rendus, January 27, 1879, p. 186. 
The Eye in the Cephalopoda. By Prof. S. Richiardi. 
The author remarked that anatomists of the present day, still ac¬ 
cepting completely Cuvier’s opinion, deny the existence in the eye of 
