note * page 6 Arch. f. mik. Anat., Bd. iv.

note † page 6 Ann. and Mag. Nat. Hist., ser. 5, vol. vi.

note ‡ page 6 Vol. iii. No. vi., April 1883

§ Proc. Arner. Acad. Arts and Sciences, vol. xx. Aug. 1884.Google Scholar

note * page 9 Q. j, M., January 3, 1884Google Scholar

note ‡ page 9 Ursprwng der Wirlelthiere, Leipzig, 1875.Google Scholar

note † page 9 Ibid, October 1884.Google Scholar

note * page 10 Professor Turner has kindly pointed out to me that John Goodsir, in a paper published in the second volume of his Anatomical Memoirs, Edinburgh, 1868, speaks of a view he once held concerning the Vertebrate primitive mouth, which is similar to the view once held by Dohrn, as mentioned above. Goodsir's view, originally published in the Edinburgh Philosophical Journal in 1857, was that the primitive oesophagus passed through the pituitary body, infundibulum, and third ventricle, and opened at the roof of the fourth ventricle behind the cerebellum. This theory, therefore, was a combination of the views which have since that time been successively favoured by Dohrn, and is anterior in date to any publications on the subject by Dohrn, Owen, or any others. Goodsir, in the paper I refer to, only mentions his theory to say that he abandoned it, because Iteiehert had shown that the pituitary body does not perforate the skull in the embryo. We know now that this reason for abandoning the theory does not exist. Goodsir completely agreed with Geoffrey St Hilaire's view concerning the reversed positions in Vertebrate and Annelid or Crustacean, and also recognised that the dorsal blood-vessel in the latter was homologous with the subintestinal vessel and heart in the Vertebrate.- Note added Jan. 28, 1885.

note * page 11 Mitt, der Zool. Statim zu Neapel, Bd. iv. Heft. 1.