File:The American journal of anatomy (1918) (14784660885).jpg

Identifier: americanjournalo23wist (find matches)
Title: The American journal of anatomy
Year: 1918 (1910s)
Authors: Wistar Institute of Anatomy and Biology Association of American Anatomists
Subjects: Anatomy Anatomy
Publisher: Baltimore, MD : (s.n.)
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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atus. Benda. Safranin and picric acid. 5/u. The outer layer(o.l.) of the zona has thickened to a greater extent than the inner (i.l.). The pro-longations show knob-like enlargements at their tips (k.e.)t The area of pro-liferation (a.p.) is deeply stained. Zone measurement 12^. Fig. 10 Transverse section of an egg 2.6 mm. in diameter from the ovary ofChrysemys picta. Bouin. Heidenhains haematoxylin. Congo red. 4/^. Theprolongations (pr.) are clearly seen extending from the scant cytoplasm of theepithelial cells down into the outer layer. The zona measures 17^ in thickness. Fig. 11 Oblique section of the egg represented in figure 10. Same fixationand staining. 4^. Note the canals and the prolongations of the epithelial cells. Fig. 12 Tangential section of the egg represented in figures 10 and 11. Bouin.Mallorys stain. 4m. With figures 10 and 11 this shows the great increase inthickness in both layers of the zona (cf. with figure 8). 256 ZONA PELLLCIDA IN TURTLE EGGS ALICE THING PLATE 2
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• II / V 257 AUTHORS ABSTRACT OF THIS PAPER ISSUEDBY THE BIBLIOGRAPHIC SERVICE, DECEMBER 15 THE FONTANELLA METOPICA AND ITS REMNANTSIN AN ADULT SKULL ADOLF H. SCHULTZ Carnegie Institution of Washington FIVE FIGURES It is not uncommon to find in the skull of a newborn infant asmall fontanelle between the two frontalia in their nasal third.This is usually called fontanella metopica (f. medio-frontalis,fonticulus interfrontalis inferior) (fig. 1). A considerable num-ber of skulls, both of children and of adults, showing short,irregular, transverse or V shaped sutures or fissures in the mid-line of the frontal bone above the level of the superciliary ridgeshave been described in the literature and interpreted as remnantsof the fontanella metopica. The author has found in the skullof an adult an abnormal suture, which is comparable to thoseabove mentioned, but which is more extensive than in any ofthe cases previously described; accordingly its publication ap-pears justifiable. This spec

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