Annual report of the Maine Agricultural Experiment Station . As development proceeds the duct enlarges and begins toproject from the ventral surface of the Wolffian body. Theperitoneum of the tubal ridge which covers the duct becomesthin like the adjacent peritoneum. As development continuesthe oviduct projects farther from the surface of the Wolffianbody which soon degenerates. The oviduct is finally suspendedby a ligament formed by a double sheet of peritoneum contin-uous at the dorsal margin of the oviduct with the peritoneumwhich surrounds the duct and reflected from the peritoneumcovering
Annual report of the Maine Agricultural Experiment Station . As development proceeds the duct enlarges and begins toproject from the ventral surface of the Wolffian body. Theperitoneum of the tubal ridge which covers the duct becomesthin like the adjacent peritoneum. As development continuesthe oviduct projects farther from the surface of the Wolffianbody which soon degenerates. The oviduct is finally suspendedby a ligament formed by a double sheet of peritoneum contin-uous at the dorsal margin of the oviduct with the peritoneumwhich surrounds the duct and reflected from the peritoneumcovering the dorsal body wall and permanent kidney along theline of origin of the oviduct. At the end of incubation thissheet of peritoneum which suspends and surrounds the oviductis continued a little below the ventral margin of the oviduct asa narrow fold. The part of this sheet of peritoneum dorsal tothe duct may be designated as the dorsal ligament of the ovi-duct (Fig. i) and the part ventral, as the ventral ligament ofthe oviduct * (Fig. i). •^ J boJy_il3^. A Ostium :P Fig. t. Diagram showing relations of tlie oviduct and its ligaments atthe time of hatching. .], anterior elongation of funnel; P, posteriorelongation of funnel. At the time of hatching the oviduct is still a straight thinwalled tube somewhat differentiated into the parts clearly dis-tinguishable in the functional duct. These are (a) the funnel * This fold of peritoneum which forms the ventral ligament occupiesthe position descrihed for the tubal ridge and it seems possible that this ridge may contribute to its formation. 4 Maine; agricultural expurime^nt station. 19io. (ostium tubae abdominale or infundibulum), (b) the albumensecreting- portion, (c) the isthmus, (d) the uterus (or shellgland) and (e) the vagina. The walls are thin and soft andthe tube empty and collapsed. The duct usually appears flat-tened laterally so that the ligaments are attached at the ends ofits greatest diameter. At its anterior end the t
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
