184 Herring 



interiaoflia, on the other liand, appears to .secrete into the brain tissue, and 

 must be regarded as a brain gland. Tlie nature of these secretions, and the 

 question as to whether that of the pars intermedia is modified by its passage 

 through brain substance, await further investigation. 



I have to express my indebtedness to Mr Richard Muir for the care 

 with which he has executed the accompanying illustrations. The expenses 

 of the research have been defrayed by a grant from the Earl of Moray 

 fund for the prosecution of research in the University of Edinburgh. 



LITERATURE REEERRED TO IN THE TEXT. 



(1) Andriezbn, "The Morphology, Origin, and Evolution of Eunction of the 

 Pituitary Body, and its Relation to the Central Nervous System," Brit. Med. Journ., 

 vol. i., p. 54, 189-1. 



(2) V. Baer, Ueber Entwickelungsgeschichte der Thiere, Th. i., S. 104 und 

 130, 1828. 



(3) Balfour, "On the Development of the Elasmobranch Eishes," Quart. 

 Journ. Micr. Science, vol. xiv., p. 362, 1874. 



(4) Beard, J.. "The Old Mouth and. the New," Anat. Anz., Bd. iii., S. 15, 1888. 



(5) Berkley, " The Finer Anatomy of the Infundibular Region of the Cerebrum, 

 including the Pituitary Gland," Brain, vol. xvii., p. 517, 1894. 



(6) Boeke, "Die Bedeutung des Infundibulums in der Entwickelung der 

 Knochenfische," Anat. Anz., Bd. xx., S. 17, 1902. 



(7) DoHRN, " Studien zur Urgeschichte des Wirbelktirpers," Mittheilungen der 

 Zoolog. Station zu Neapel, iii., S. 252. 



(8) DuRSY, Zur Entwickelungsgeschichte des Kopfes, S. 76, Tu])ingen, 1869. 



(9) Gaskell, "On the Origin of Vertebrates," Journ. of Anat. and Physiol., 

 vol. xxxiv., p. 534, 1900. 



(10) Gaupp, E., "Ueber die Anlage der Hypophyse bei Saurien," Arcli. f. mikr. 

 Anat., Bd. xlii., S. 576, 1893. 



(11) Gemelli, " Sur la structure de la region infundibulaire des poissons," Journ. 

 de I'Anat., Annee xlii. 



(12) GoTTB, Entwickelungsgeschichte der Unke, S. 288, 317, Leipzig. 



(13) Haller, B., " Untersuchungen liber die Hypophyse und die Infundibular- 

 organe," Morpholog. Jahrbuch, Bd. xxv., S. 31, 1896. 



(14) His, Untersuchungen iiber die erste Anlage des Wirbelthierleibs, S. 134, 

 Leipzig, 1868. 



(15) JuLiN, "Rechei'ches surl'organisation desAscidies simples. — Sur I'hypopliyse 

 et quelques organes qui s'y rattachent," Arch, de Biologie, ii., p. 211, 1881. 



(16) KoLLiKER, "Entwickelungsgeschichte des Menschen und der lioheren 

 Thiere," 2te Aufl., S. 527-531, Leipzig, 1879. 



(17) KuLLiKER, Gewebelehre des Menschen, Bd. ii., S. 605, 1896. 



(18) IvRAUSHAAR, " Entwickelung der Hypophysis und P]piphysis l)ei 

 Nagethieren," Zeitschr. f. wiss. Zoolog., Bd. xli., S. 79, 1885. 



