[17]. ‘Palæontology,’ by Professor Owen.
[18]. Prof. Owen.
[19]. Mr. Gosse.
[20]. ‘Lectures on Comparative Anatomy,’ by Professor Owen.
[21]. Described in ‘The Microscope,’ by Dr. Carpenter.
[22]. ‘Lectures on Comparative Anatomy,’ by Professor Owen.
[23]. ‘Lectures on Comparative Anatomy,’ by Professor Owen.
[24]. Dr. F. Müller, of Santa Caterina.
[25]. ‘Recherches sur quelques Animaux inférieurs de la Méditerranée,’ par C. Vogt: Mémoires de l’Institut National Génevois, tom. i.
[26]. Published in 1858, by the Ray Society.