323 



10) Cunningham, R. 0., Note on the Presence of Supernumerary Bones 

 occupying the place of the Prefrontals in the Skulls of certain 

 Mammals. Ibid., 1899, p. 76. 



11) Forsyth Major, C. I., On some Characters of the Skull in the 

 Lemurs and Monkeys. Proc. Zool. Soc. Lond., 1901, p. 129. 



12) Frassetto, f.. Notes de Craniologie Comparee. Ann. Sc. Nat., T. 17, 

 Zoologie, 1903, p. 143. 



13) Mater, R., Archiv f. physich Heilk., 1849, p. 235. 



Nachdruck verboten. 



Notes on Myxiiie. 



I. 

 By F. J. Cole. 

 The following notes have been written in connection with a mono- 

 graph I am at present writing on the general anatomy and morphology 

 of Myxine. The first part of this work on the descriptive anatomy 

 of the skeleton is in the press, and the second part on the muscles 

 will be ready by the end of the year. 



Biliary System. 

 The gall bladder and hepatic ducts are quite unique. There are 

 normally two hepatic ducts — one from each lobe of the liver. These, 

 instead of uniting to form the common bile duct, open directly 

 into the large gall bladder. The bile duct itielf opens into the 

 gall bladder between these two apertures. The gall bladder of Myxine 

 therefore has three openings. In one specimen dissected there were 

 two anterior hepatic ducts, each having a separate opening into the 

 gall bladder, so that in this specimen there were four cystic aper- 

 tures. 



Kidney. 

 There is generally no unbroken connection between the so-called 

 pro- and meso-nephros of Myxine, although isolated Malpighian bodies 

 occur in the intermediate region. Weldon describes an imperforate 

 cord connecting the two parts of the kidney in Bdellostoma. I have 

 however dissected one specimen in which the segmental duct was con- 

 tinued forwards as a tube into the pronephros. This becomes of 

 interest in view of Bashford Dean's work on the development of the 

 "mesonephros" of Bdellostoma. 



21* 



