File talk:Wyburn1937 table01.jpg
From Embryology
Table I. Table showing extent of cloacal membrane relative to the size of the embryo
| Embryo | Length of embryonic disc Presomite | Cloacal membrane |
|---|---|---|
| W.O. (V. Mollendorlf, 1925) | 0.25 mm | What von Mollendorlf describes as the cloacal membrane is, according to Florian, the primitive streak, and von Mollendorif’s allantois is the cloacal membrane of Florian |
| “Fetzer” (Fetzer & Florian, 1930) | 0.26 mm. | The cloacal membrane is separated by an interval from the primitive streak |
| T. F. (Florian (1928)) | 0.4 mm | The cloacal membrane is a cord of cells which extends on to and connects the allantoic endoderm with the amniotic ectoderm |
| Bi I | ? | Primitive streak reaches the cloacal membrane |
| Bi 24 | 0.625 mm | Length 0-06 min |
| “Hugo” Stieve (1926) | 0-635 mm | Length 0-035 mm |
| “Beneke” | 0.75 mm | Cloacal membrane separated by an interval from (Strahl & Beneke, 1910) the primitive streak |
| W.A. 17 (Grosser, 1930-1) | 0.85 mm | Length 0-13 mm and extends on to the allantois |
| “Dobbin” (Hill & Florian, 1931) | 0-98 mm | Length 0.08 mm |
| Peh-Hochstetter Rossenbeck (1923) | 1-4 mm | Cloacal membrane extends well on to allantois |
| Heuser (1930) | 1.6 mm | Cloacal membrane extends well on to allantois |
| Ingalls (1918) | 2-0 mm | Length 0-12 mm, and there is an additional connexion between the allantoic endoderm and amniotic ectoderm |
| Somites | ||
| F. von Orts Llorca (1934) | 2 | Cloacal membrane in two parts—one of which is allantoic |
| H 3 (Wilson) | 2-3 | Cloacal membrane at the commencement of allantois |
| Bi II | 4 | Cloacal membrane broken up—one portion involvingallantois |
| Sternberg (1927) | 4 | Cloacal membrane is in four portions |
| Pfannenstiel-Kromer | 5-6 | Very short cloacal membrane extending some distance into the allantois |
| Dandy (1910) | 7 | Not mentioned |
| Payne (1925) | 7 | Not mentioned |
| West (1930) | 8 | Length 0.09 mm |
| Etemod (1899) | 8 | Length 0-05 mm |
| Corner (1929) | 10 | Cloacal membrane terminates before reaching the allantois |
| Embryo Bl. XI | 10 | Cloacal membrane terminates before reaching the allantois |
| Pfannenstiel III | 13-14 | Has trebled its length compared to P£annenstiel-Kramer |
| Heuser (1930) | 14 | Length 0-18 mm |
| Atwell (1930) | 17 | Length 0-18 mm Extends to the allantois |
| Davis (1924) | 20 | Length 0-16 mm |
Table I is a series of embryos arranged according to size, with, as far as can be obtained, the available data regarding the cloacal membrane.
