The works of Francis Maitland Balfour, Volume 1 (of 4)

by Francis M. Balfour

E. Ray Lankester. Annals and Mag. of Nat. History, Vol. XI. 1873, p. 81.

W. Müller. “Ueber die Persistenz der Urniere bei Myxine Glutinosa,” Jenaische Zeitschrift, Vol. VII. 1873.

Oellacher. Zeitschrift für Wiss. Zoologie, Vol. XXIII. 1873.

Owsjannikow. “Entwicklung der Coregonus,” Bul. der K. Akad. St Petersbourg, Vol. XIX.

Romiti. Archiv. für Micr. Anat., Vol. IX. 1873.

Waldeyer. Eierstock u. Eie.

EXPLANATION OF PLATES 3 AND 4.

COMPLETE LIST OF REFERENCE LETTERS.

al. Alimentary canal. ao. Dorsal aorta. auv. Auditory vesicle. bd. Formative cell probably derived from the yolk. cav. Cardinal vein. ch. Notochord. ch´. Thickening of hypoblast to form the notochord. Eb. Line indicating the edge of the blastoderm. ep. Epiblast. ep´. Epidermis. er. Embryonic rim. es. Embryonic swelling. gl. Glosso-pharyngeal nerve. h. Head. ht. Heart. hy. Hypoblast. ll. Lower layer cells. ly. Line of separation between the blastoderm and the yolk. m. Mesoblast. mc. Medullary canal. mg. Medullary groove. mp. Muscle-plate. mp´. Early formed mass of muscles. n. Peculiar nuclei formed in the yolk. n´. Similar nuclei in the cells of the blastoderm. na. Cells which help to close in the alimentary canal, and which are derived from the yolk. ny. Network of lines present in the food-yolk. ol. Olfactory pit. op. Eye. ov. Oviduct. pn. Pineal gland. pov. Projection which becomes the ovary. pp. Pleuro-peritoneal cavity. pp´. Remains of pleuro-peritoneal cavity in the head. prv. Protovertebræ. pwd. Primary points of involution from the pleuro-peritoneal cavity by the coalescence of which the Wolffian duct is formed. sg. Segmentation cavity. so. Somatopleure. sos. Stalk connecting embryo with yolk-sac. sp. Splanchnopleure. spn. Spinal nerve. sur. Suprarenal body. ts. Caudal lobes. v. Blood-vessel. vg. Vagus nerve. V. Fifth nerve. VII. Seventh nerve. vc, 1, 2, 3, &c. 1st, 2nd and 3rd &c. visceral clefts. vp. Vertebral plates. wd. Wolffian duct. x. Peculiar body underlying the notochord derived from the hypoblast. yk. Yolk spherules.

All the figures were drawn with the Camera Lucida.