BLOOD-VESSELS OE MUSTELUS ANTARCTICUS. 
725 
not more than 3 feet long and 5 inches in diameter, were less thoroughly frozen than 
the carcases of sheep exposed to the same temperature for forty-eight hours. 
Bibliography. 
The following list contains only the names of such works as I have myself been 
able to consult; one or two papers quoted at second-hand are referred to in foot-notes. 
1. Balfour, F. M. ‘A Monograph on the Development of Elasmobranch Fishes.’ 
London, 1878. 
2. Balfour, F. M. ‘A Treatise of Comparative Embryology.’ Yol. 2. London, 
1881. 
3. Bateson, W. “ The Later Stages in the Development of Balanoglossus Koica- 
levsJcii, with a suggestion as to the Affinities of the Enteropneusta.” ’Quart. 
Journ. Microsc. Sci.,’ vol. 25, 1885 (Suppl.), p. 81. 
4. Claus, C. ‘ Text-book of Zoology.’ (English Edition.) Vol. 2. London, 1884. 
5. Dohrn, A. “ Die Entwicklung und Differenzirung der Kiemenbogen der Sela- 
chier.” ‘Neapel, Zool. Stat. Mittheil./ vol. 5, 1884, p. 102. 
6 . Duvernoy, G. L. “ Sur quelques particularites du Systeme sanguin abdominal 
et du Canal alimentaire de plusieurs Poissons cartilagineux.” (1833.) £ Ann. 
Sci. Nat., Zool.,’ vol. 3, 1835, p. 274. 
7. Gegenbaur, C. ‘Elements of Comparative Anatomy.’ (English Edition.) 
London, 1878. 
8. Gunther, A. ‘ An Introduction to the Study of Fishes.’ Edinburgh, 1880. 
9. Hubrecht, A. A. W. “ On the Ancestral Form of the Chordata.” ‘Quart. Journ. 
Microsc. Sci.,’vol. 23, 1883, p. 349. 
10. Huxley, T. H. ‘A Manual of the Anatomy of Vertebrate Animals.’ London, 
1871. 
11. Hyrtl, J. “ Das arterielle Gefiiss-System der Bochen.” 4 Wien, Sitz. Ber.’, voh 25, 
1857, p. 236. 
12. Jourdain, S. “ Becherches sur la Veine Porte Benale.” ‘Ann. Sci. Nat., Zool.’, 
vol. 12, 1859, p. 321. 
13. Macalister, A. ‘An Introduction to the Systematic Zoology and Morphology 
of Vertebrate Animals.’ Dublin and London, 1878. 
14. Milne Edwards, H. ‘Le§ons sur la Physiologie et l’Anatorme Comparee,’ 
vol. 3, 1858. 
15. Milne Edwards, H. Op. cit., vol. 4, 1859. 
16. Monro, A. (Jun.) ‘ The Structure and Physiology of Fishes.’ Edinburgh, 1785. 
17. Muller, J. ‘ Vergleichende Anatomie der Myxinoiden.’ (1839.) Berlin, 1841. 
