Quarterly journal of microscopical science . perm-path from the recepta-culum to the commencement of the oviduct at >j; , vasdeferens; , coils of the oviduct similarly numbered inText-fig. 3. into the everted penis, giving it its shape and firmness. Thelarge cells lining it contain a clear secretion which, unlike thegranular contents of the prostatic cells of the vas deferens, 450 T. J. EVANS takes up no dyes, acid or basic. The fact that no other Aeolidio-morph possesses such a glandular appendage of the penis addsto the interest of this coincident acquisition of primitiveposi
Quarterly journal of microscopical science . perm-path from the recepta-culum to the commencement of the oviduct at >j; , vasdeferens; , coils of the oviduct similarly numbered inText-fig. 3. into the everted penis, giving it its shape and firmness. Thelarge cells lining it contain a clear secretion which, unlike thegranular contents of the prostatic cells of the vas deferens, 450 T. J. EVANS takes up no dyes, acid or basic. The fact that no other Aeolidio-morph possesses such a glandular appendage of the penis addsto the interest of this coincident acquisition of primitiveposition and structure. The female duct is in very young specimens a straightbroad tube leading from the bifurcation of the sperm-oviductto the exterior. During growth this is differentiated intoa dorsal, much-coiled oviducal passage and a ventral straightpathway for the introduced spermatozoa. The dorsal coils( and ) are folds of the greatly enlarged female duct,and in the figure are shown to form a continuous tube. In Text-fig. Section through the female complex at lr in Text-rig. 2. ,folds of the oviduct through which the eggs pass ; 5, path of spermmigration downwards ; , thin ventral wall of the , vas deferens. surface view the coils project as two bulges, one on the left infront and the other behind and on the right. The former hasbeen by common consent called mucus or nidamental gland,and appears in pickled specimens of the Opisthobranchs asa brittle while mass, swelling in water, while the latter is namedalbumen gland. Many authors have stated or conveyed theimpression that these lobes are dependent glands opening byducts into the oviduct and pouring their secretion on the eggsas they pass. The long continuous tube here described, how-ever, con 11 discs both lobes, and is actually the functional oviductthrough which the ejggs pass, and in which they receive thesuccessive layers of nidaineiitum. The first or posterior lobe(s
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisheroxfor, bookyear1853
