. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 172 ANNELIDA. Fig. is contained in the rest of the apparatus. These organs (fig-74, g) are generally regarded as accessory vesicles, and they vary both in number and form in different species. The female apparatus is of much less mag- nitude, but also presents a sufficiently com- plicated structure: it is situated between the two canals leading to the accessory vesicles of the male apparatus, and is a little posterior to the penis. The external orifice, of which we have already spoken, communicates with a short cana
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 172 ANNELIDA. Fig. is contained in the rest of the apparatus. These organs (fig-74, g) are generally regarded as accessory vesicles, and they vary both in number and form in different species. The female apparatus is of much less mag- nitude, but also presents a sufficiently com- plicated structure: it is situated between the two canals leading to the accessory vesicles of the male apparatus, and is a little posterior to the penis. The external orifice, of which we have already spoken, communicates with a short canal (jig. 74 and 76, //), of a greyish colour, which leads to a sort of pouch (i). This, accord- ing to some authors, is analogous to an ute- rus, but in the opi- nion of other natura- lists is merely a copu- lative vesicle for the pur- pose of retaining the fecundating liquid which is there deposited by the male in the act of copulation. This sac is bent upon itself, and a duct (j) may be observed to be continued from the anterior extremity which leads to the ovaries (k): these are small whitish bodies two in number, and in close approximation to one another. In the earthworm, the only parts that can be regarded as male organs are some sacs or vesicles varying in number from two to seven, and situated in a longitudinal series on either side of the ventral aspect of the body towards its anterior extremity. Each of these vesicles adheres to the parietes of the splanchnic cavity, by a small canal opening directly outwards by pores placed on the posterior and inferior part of the corresponding ring: there is farther a canal of communication, which is continued directly from one vesicle to another of the same lateral series; and at the season of co- pulation there is found in the interior of these organs a viscid liquid abounding with seminal microscopic animalcules. The outlets of the female apparatus occupy the sixteenth segment of the body, and are continuous internally with two
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