v. 1. 1. On some points in the geology of the East Lothians Coast; 2. Development [and] growth of the layers of the blastoderm; 3. Disappearance of the Primitive Groove in the Embryo Chick; 4. Development of the blood-vessels of the Chick; 5. Preliminary account of the development of the Elasmobranch fishes; 6. Comparison of the early stages in the development of Vertebrates; 7. On the origin and history of the urinogenital organs of vertebrates; 8. On the development of the spiral nerves of amphioxus; 10. A monograph on the development of the spinal nerves in Elasmobranch fishes; 11. On the phenomena accompanying the maturation and impregnation of the ovum; 12. On the structure and development of the vertebrate ovary; 13. On the existence of a head-kidney in the embryo chich, and on certain points in the development of the Müllerian duet, by F.M. Balfour and A. Sedgwick; 14. On the early development of the lacertilia together with some observations on the nature and relation of the primitive streak; 15. On certain points in the anatomy of Peripatus Capersis; 16. On the morphology and systematic position of the Spongida; 17. Notes on the development of the Ararenia; 18. On the spinal nerves of Amphioxus; 19. Address to the department of anatomy and physiology of the British Association for the advancement of Science; 20. On the development of the skeleton of the paired fins of Elasmobranchii, considered in relation to its bearings on the nature of the limbs of the Vertebrate; 21. On the Evolution of the placenta, and on the possibility of employing the characters of the placenta in the classification of the Mammilia; 22. On the structure and development of lepidosteus by F.M. Balfour and W.N. Parker; 23. On the nature of the organ in adult Teleosteans and Ganoids which is usually regarded as the Head-kidney or Pro Nephros; 24. A renewed duty of the germinal lawyers of the chich by F.M. Balfour and F. Deighton; 25. the anatomy and development of Peripatus Capensis ed. by H.N. Mosley and A. Sedgwick.- v. 2 [and] 3. Treatise on comparative embryology.- v. 4. Plates 14