. The American beaver and his works. Beavers. 304 APPENDICES. The Weberian organ, or the uterus masculinus, is well devel- oped in the beaver. It is triangular in shape, flattened and thin antero-posteriorly, and is connected by its edges with the vasa deferentiae. It lies between the bladder and the vesiculge semi- nales. Below it seems lost in the thin connective tissue. In the upper part, where it is l^" in width, is a small cavity without any outlet. The filaments which extend from the superior angles lie upon the vasa deferentiae, and disappear at the bottom of the testicles, being 6
. The American beaver and his works. Beavers. 304 APPENDICES. The Weberian organ, or the uterus masculinus, is well devel- oped in the beaver. It is triangular in shape, flattened and thin antero-posteriorly, and is connected by its edges with the vasa deferentiae. It lies between the bladder and the vesiculge semi- nales. Below it seems lost in the thin connective tissue. In the upper part, where it is l^" in width, is a small cavity without any outlet. The filaments which extend from the superior angles lie upon the vasa deferentiae, and disappear at the bottom of the testicles, being 6|" in length. Tlie significance of this structure, so interesting to the philosophical anatomist, is but at present a matter of speculation. Homologous with the uterus, the vesi- cula prostatica, as it is sojnetimes called, like the mammas of the male, suggests the idea of typical structures, or of organs of original utility, but dwarfed in the progress of Brawn by \V. W. My. In Fig. 3, the genital organs of the female arc represented. The parts being dissected from the'r connections, and laid on a flat surface before the drawing was made, their natural relations are somewhat altered. The oil sacs and castoreum sacs are discon- nected. They are much larger than the other specimen, relatively to the size of the animal. The cloaca is laid open, and the vaginal orifice is higher than in the natural state ; this, and the urethral. 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 Morgan, Lewis Henry, 1818-1881. Philadelphia, J. B. Lippincott & Co.
Size: 1468px × 1702px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublisherphiladelphiajblipp
