. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 106 8. HATAI. 4. Spermatihecx.—One' pair in segment X, spindle-shaped, and situated between the two testes, on either side of the intestine. The single coalesced duct opens to the exterior on the ventral median line, directly behind the interseg- mental line IX/X. The internal surface of the sac is lined with a non-ciliated epithelium, which is followed by a layer of longitudinal and of circular muscle fibres. The external surface is covered with peritoneal cells. Xo spermatophores could be observed in the spermathecœ. .1. Oviduct
. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 106 8. HATAI. 4. Spermatihecx.—One' pair in segment X, spindle-shaped, and situated between the two testes, on either side of the intestine. The single coalesced duct opens to the exterior on the ventral median line, directly behind the interseg- mental line IX/X. The internal surface of the sac is lined with a non-ciliated epithelium, which is followed by a layer of longitudinal and of circular muscle fibres. The external surface is covered with peritoneal cells. Xo spermatophores could be observed in the spermathecœ. .1. Oviduct.—In V. pilosvs the oviduct is stated to be rudimentary, being represented by a pair of depressions of the 12th septum. In the present species no trace of the oviducts could be observed either in transverse or longitudinal sections. 6. Ovisac {lici-eplaculuin ovarian). —One pair in segment XIII, being formed by the backward bulging out, on the left dorsal side, of the anterior septum, and extending sometimes into the 15th segment but sometimes step- ping short in segment XIV. The mouth of the sac is very large and opens, as a matter of course, into the cœlom of segment XII. The anterior part tf the ovisac encloses, as already stated, the hinder end of the sperm- sac, but the posterior part is slender. The ripe ova are found not only in the ovisac but also floating in the cœlom of this region. (In V. pilosvs the ovi- sac opens into the cœlom of segment XI) 7. Sierm-duct.—This is very dif- ferent from that of V. pilosis. The funnel is relatively large and bores septum IX/X ; it is continued into a slender duct, which, after running on the inner side of the ovary till about tha. Cut 3. a- Atrium, Pe. Peritoneum, Sep. Septum, Spermiducal 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 resemble the original
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1897
