and a new Represent ative of it, S. Claparedii, 7 



tion is connected with the change of form. This opinion is 

 founded upon the circumstance that in the small papilhe 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 iilaments 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 papillre of the cephalic seg- 

 ment arc 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 Sphcerodorum, Kolliker remarks that the (whole of the) small 

 papillae of the skin are not pierced by glands, but contain nerve- 

 terminations — in direct contradiction to Claparede, who found 

 the papillse 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 Sphce- 

 rodorum, collected last summer in Heligoland, I cannot decide 

 upon this difference, or whether the above-described distinction 

 between tactile and glandular papilhe exists also in Spharo- 

 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. Each foot (tig. 2) consists of a conical tubercle, at the 

 apex of wliich there is a pair of lamellar processes or fins and a 

 bundle of about six composite setai inserted into the tubercle ; 

 posteriorly the number of the latter diminishes, so that on the 

 last segments there are only one or two setaj 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 placed on the lov/er surface of the cephahc seg- 

 ment, towards the anterior margin; this, when retracted, re- 

 sembles a funnel with nuuicrous folds. The mouth leads at 

 once into a spacious flask-shaj)ed oesophagus (fig. 1) or gizzard 

 with double wails, 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 voluntai-ily 

 extended, and is consequently to be regarded as a trunk, I was 

 imable to determine by observation. The oesophagus 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 live convo- 



