6 MM. Kowalevsky and Barrois on Anchinia. 
The vibratile band is composed of small cells of elongated 
form, with a large nucleus and small cell-body ; these cells 
are closely juxtaposed in the direction of their length. _ 
The vibratile band appears to have very intimate relations 
with the endostyle; from the two extremities of that organ 
we see issue a band having the same structure as the vibratile 
band, with which it unites at its two points of curvature. Un- 
fortunately we have not succeeded in making out to what 
portion of the endostyle these two bands belong by penetrating 
into the interior of the organ. 
b. Nervous ganglion.—This is situated rather far from the 
incurrent aperture, but not far from the upper extremity occu- 
pied by the spiral organ. It consists of an epithelial portion 
always united by a slender cord to the upper part of theciliary 
pit, and of a mass of nerve-cells which surmounts this. The 
funiculus which unites the ganglion with the olfactory pit is 
always very short, never attaining a length comparable to that 
which occurs in Doliolum. The nervous ganglion always 
remains very near the pit. 
c. Nerves.—Viewed from the side (fig. 8, left side), the 
nervous ganglion is seen to give origin to five nerves. 
The first pair (1) runs directly forward, passes at but a 
short distance from the vibratile pit, traverses the ciliary band, 
and terminates about the median line near the upper margin 
of the incurrent aperture. 
The second pair (2), which is longer, follows nearly the 
same course, but runs lower down, and terminates at the level 
of the inferior margin of the same aperture. 
The third (3) forms a strong and very apparent nervous 
filament. It runs directly backwards and downwards, and 
divides not far from its origin, and a little before attaining the 
branchiz, into two distinct branches. The first of these 
branches passes above the branchia towards the tenth fissure, 
and terminates at the upper part of the excurrent orifice. The 
second, which is longer, likewise passes over the branchia, 
about the twelfth or thirteenth fissure, and terminates behind 
the intestine towards the posterior part of the point of attach- 
ment of the peduncle. 
The fourth (4) is only a very short filament directed to- 
wards the summit of the branchia, and also divided into two 
very slender branches. 
The fifth (5), a little way from its origin, unites with a 
nerve originating from the opposite side; then the common , 
trunk formed by their union runs backward and to the left of 
the spiral organ, to reach the great dilatation (cs) of the 
general cavity ; it traverses this lacuna in a curve, and reaches 
