and anew Representative of it, 8. Claparedii. — 8 
two more tentacles, one on each side, which might be deno- 
minated posterior cephalic tentacles or tentacular cirri; so that 
we have in all six tentacles on the head—four anterivr, and two 
posterior. The small clavate papilla mentioned above as oc- 
curring in the spaces between the anterior tentacles, extend also 
into the region of the posterior tentacles, but are not so closely 
eens, and from this point begin to change from the 
elongate clavate to a more globular form. I call attention at 
once to this change, as it indicates at the same time a change 
in the function of these cutaneous appendages, the anterior cla- 
vate appendages being, in my opinion, organs of touch, whilst 
- the posterior globular ones are to be regarded as glands. The 
middle part of the cephalic segment bears two reddish-brown 
eyes, which are placed a little within the bases of the two lateral 
pesterior tentacles. The segment of a spherical lens projects 
from each eye forward and outward. 
The cephalic segment, as already remarked with regard to 
the segmentation in general, is not separated by any transverse 
furrow from the first segment of the body, but passes into it 
without any definite boundary. The first body-segment is 
therefore determined partly by the inferior setiferous pedal tu- 
bereles, and partly by the large globular cutaneous appendages 
which at this spot pass like a ring round the whole body. I 
say like a ring, and must call particular attention to this, be- 
cause, singularly enough, these appendages are not only ar- 
ranged transversely upon the dorsal~surface between the two 
lateral rudimentary feet, but occupy the ventral surface also in 
_the same manner*. As regards the number, however, there is 
a noticeable difference between those standing on the dorsal 
and yentral surfaces; for whilst on the back there are six of 
_ these globular bodies in a row, there are only four on the ven- 
tral surface. This condition, of course, tends greatly to sug- 
gest the notion that the two outer lateral processes situated 
upon the back over the pedal tubercles are to be regarded as 
the two true dorsal cirri. But the two lateral structures are 
perfectly similar to those standing in a row between them, 
both in size and form. As regards their function, moreover, 
there is no distinction ;.all, as we shall see hereafter, are glands. 
If, therefore, we were to call the two lateral proeesses dorsal 
cirri, this might also be required for the other similar ap- 
pendages situated on the back, and, in the same way, we should 
also have to name the transverse rows situated on the ventral 
surface ventral cirri. It would be no obstacle to such a conception 
—* In Spherodorum peripatus, as is well known, only one pair of these 
globular cutaneous appendages is situated upon each segment—one on 
each side of the back, 
1* 
