. La cyclopaedia d'anatomie et physiologie. Anatomie ; physiologie ; Zoologie appendices. formulaire appelé antennes, (6,c), le nombre de ce qui est généralement de trois, quatre ou cinq. La bouche est située à l'extrémité du corps, et dans l'acéphale annelida est di- vers l'avant, mais dans corrigées les espèces cephalous cette ouverture est situé en dessous de la base de la tête. L'anus est placé à l'autre ex- tremity, et est presque toujours trouvé sur la partie dorsale du corps. Un certain nombre d'annélides sont complètement apodous, et ne présentent pas la moindre trace d'un appendice sur l'un des segments de t

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. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. form appendages called antennas, (6, c), the num- ber of which is generally three, four, or five. The mouth is situated at the extremity of the body, and in the acephalous annelida is di- rected forwards, but in the cephalous species this opening is situated below the base of the head. The anus is placed at the opposite ex- tremity, and is almost always found on the dorsal aspect of the body. A certain number of Annelida are completely apodous, and do not present the least trace of an appendage on any of the segments of the body (the hirudinidae). Others exhibit on either side many rows of bristles, which fulfil the office of feet (the terri- colae). In others, again, the bristles of which we have spoken are supported on a fleshy tubercle more or less prominent, and more or less complicated in structure, and to these organs the name of feet is applied. The feet of the Annelida, when they present the maximum of development of which they are susceptible in that class of animals, are com- posed each of two very distinct portions, placed one above the other, and appertaining the one to the dorsal, the other to the ventral arch of the ring. (See Jig. 63, which represents one of the feet. of an amphinome.) M. Savigny, who was the first to study with due care the zoological cha- racters furnished by these appendages of the annelida, gave to these portions of the feet the names of dorsal oar («) and ventral oar (6) (rame dorsal et rame ventral). Sometimes these oars are pretty distant from one another, (Jig. 63.) sometimes they are separated only by a shallow fissure (Jig- 64. which represents the foot of a nereid), and occasionally they are so intimately blended together that they can hardly be dis- Fig. 64.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly re

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