. The development of the albino rat, Mus norvegicus albinus. Embryology -- Mammals; Rats. 30 G. CARL HUBER even in the 2-cell stage, more clearly shown in the 4-eell and later segmentation stages, as will appear from further reconstructions presented. It would seem to me reasonable to assume that these cell masses are of such plasticitj^ that they are molded by the tubal mucosa rather than they would compress the mucosa and maintain an inherent form. A number of segmented ova in presumably the 6- and 8-cell stages were removed from oviducts by injection and studied in warm normal salt solution
. The development of the albino rat, Mus norvegicus albinus. Embryology -- Mammals; Rats. 30 G. CARL HUBER even in the 2-cell stage, more clearly shown in the 4-eell and later segmentation stages, as will appear from further reconstructions presented. It would seem to me reasonable to assume that these cell masses are of such plasticitj^ that they are molded by the tubal mucosa rather than they would compress the mucosa and maintain an inherent form. A number of segmented ova in presumably the 6- and 8-cell stages were removed from oviducts by injection and studied in warm normal salt solution, in a liv- ing state. In the warm normal salt solution the morula masses. Fig. 13 JNIodel of right oviduct of rat No. oO, 3 days, 1 hour. X 10. \ short segment of the upper end of the uterine horn, h)\ver part of the figure, is included. The fimbriated end and a part of the infundibuliun removed in the drawing so as to expose the underlying loops; their reLative position is indicated in dotted outline. The position of the four ova in the 4-cell stage, at the beginning of the last loop of the oviduct, is shown as it seen through a transparent wall. presented a nearly spherical form, conforming to the conventional illustrations of the same. In none of the sections of fixed material of my series was this the case. The form of the cell mass, assumed b}^ the segmenting mammalian ovum in early stages of segmenta- tion, therefore, seems to me a question more for academic dis- cussion than one of fundamental importance. The right ovi- duct of rat No. 50 (3 days, 1 hour) was reconstructed after the Born method. This model is reproduced in figure 13, and includes the uppermost end of the uterine horn. The oviduct. 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 Huber, Gotthelf Carl, 1865-. Philadelphia, Pa
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