A treatise on zoology . Fig. 76. Torpedo embryo with yolk-sac. (After Rtickert, fromHertwigs Handbuch.) 1, vitelline artery; 2, vitellinevein ; 3, remains of the peripheral sinus. Ii6 PISCES number of uniform teeth succeeding each other throughout life, aseparate opening for each gill-slit, an optic chiasma, a contractileconus arteriosus, a purely venous heart, a pericardium communicat-.

---

Size: 901px × 2774px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology