and a new Representative of it, S. Claparedii. 7 
tion is connected with the change of form. This opinion is 
founded upon the circumstance that in the small papille of the 
cephalic segment I have never detected structures resembling 
the above-described developmental stages of the glands, or the 
latter with their openings. On the other hand, it appeared to 
me that fine filaments penetrated into some of them from 
below, and passed at the top into granular inflations: these 
therefore might be regarded as the extremities of nerves. I 
believe, therefore, that these small papillee of the cephalic seg- 
ment are to be regarded as tactile organs, in contradistinction 
to the globular appendages seated upon the rest of the body, 
which, as already shown, are cutaneous glands. With reference 
to Spherodorum, Kolliker remarks that the (whole of the) small 
papille of the skin are not pierced by glands, but contain nerve- 
terminations—in direct contradiction to Claparéde, who found 
the papille of the entire surface of the skin pierced by the 
efferent ducts of small cutaneous glands in the same animal. 
As I have at my disposal only a few spirit-specimens of Sphe- 
rodorum, collected last summer in Heligoland, I cannot decide 
upon this difference, or whether the above-described distinction 
between tactile and glardular papille exists also in Sphero- 
dorum. 
Besides the described circlet of globular glandular capsules 
(or, if it be preferred, the transverse rows of dorsal and ventral 
cirri), each segment also bears a pair of uniramose pedal tuber- 
cles. Hach foot (fig. 2) consists ofa conical tubercle, at the 
apex of which there is a pair of lamellar processes or fins and a 
bundle of about six composite sete inserted into the tubercle ; 
posteriorly the number of the latter diminishes, so that on the 
last segments there are only one or two sete in each tubercle ; 
but these are exactly similar to those of the anterior feet. The 
pedal tubercles are placed directly beneath the two lateral dorsal 
capsules, and are usually in part concealed by them. 
The alimentary apparatus of our animal commences with a 
buccal orifice piaced on the lower surface of the cephalic seg- 
ment, towards the anterior margin; this, when retracted, re- 
sembles a funnel with numerous folds. The mouth leads at 
once into a spacious flask-shaped cesophagus (fig. 1) or gizzard 
with double walls, or rather consisting of two chambers placed. 
to a certain extent one within the other. By compression, the 
inner part can be pushed out ; but whether it can be voluntarily 
extended, and is consequently to be regarded as a trunk, I was 
unable to determine by observation. The cesophagus is directly 
followed, and, indeed, embraced, by a rather wide, dark-brown 
intestine, which lies loose in the body-cavity without any attach- 
ments or constrictions, and. makes about four or five convo- 
