Horse foetuses: five figures showing the foetus of a horse during the gestation period, with dissections of its abdomen and stomach demonstrating the foetal circulation system. Engraving by T. Cowan after B. Herring, ca. 1860.

Benjamin Herring · 1860

Lettering: Anatomy - gestation, the foetus & foetal circulation ; fig. 1, The foetus, enveloped in its membranes, removed from the uterus ; fig. 2, The foetus, denuded of its membranes, showing the umbilical vessels untwisted ; fig. 3, The foetus, in situ, with its surrounding fluids & membranes ; fig. 4, The foetus, with its abdomen laid open, & foetal circulation shown by untwisting the four vessels of the umbilical cord: one vein, two arteries & the urachus, cut off ; fig. 1a (of Plate XIII), The stomach with its orifices &c. Bears number: Plate XIIIa. Figures individually lettered for key.