[345] Journal of Anatomy and Physiology, Vol. IX.
[346] Loc. cit. pp. 85-89.
[347] For the development of the segmental duct, vide p. [345], et seq.
[348] “On the Male and Female Organs of Sharks and Skates, with special reference to the use of the claspers,” Proceed. American Association for Advancement of Science, 1874.
[349] Loc. cit.
[350] Loc. cit. pp. 412, 413.
[351] “The Urinogenital Organs of Vertebrates,” Journal of Anatomy and Physiology, Vol. X. p. 47. [This edition, p. [164].]
[352] Journal of Anatomy and Physiology, Vol X. 1875. [This edition, No. VII.]
[353] This at least holds good for one of my embryos at this stage, which is labelled Scy. canicula, but which may possibly be Scy. stellare.
[354] Loc. cit. p. 364.