Paper, 'Note to a paper on the blood-vessels of Mustelus antarcticus [Gummy shark]' by Thomas Jeffery Parker Parker writes: 'My attention has been called by a perusal of Professor Milnes Marshall and Mr C H Hurst’s "Practical Zoology" (London, 1887), to an omission in my description of the venous system. These authors describe and figure, in Scyllium canicula a transverse anastomosis, the inter-orbital sinus, connecting the right and left orbital sinuses, and running in the floor of the skull immediately caudad of the pituitary fossa. I find that this anastomotic trunk is present in Mustelus antarcticus, in which species, however, it hardly deserves the name of sinus being only 1 mm. in diameter in a dog-fish 1 metre long.' Annotations in pencil and ink. Subject: Physiology / Zoology Received 2 May 1887. Read 16 June 1887. Communicated by Michael Foster. A version of this paper was published in volume 42 of the Proceedings of the Royal Society as 'Note to a paper on the blood-vessels of Mustelus antarcticus (‘Phil. Trans.,’ 1886)'. 1887