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The Morphological Contnuity of the Germ-Cells in Raja batis. Anatomischer Anzeiger, 18, 465–485

Beard, J. (1900)
A Thymus-Element of the Spiracle in Raja. Anatomischer Anzeiger, 18, 359–363

Beard, J. (1887)
The origin of the segmental duct in Elasmobranchs. Anatomischer Anzeiger, 2, 646–652

Beard, J. (1887)
The Ciliary or Motoroculi ganglion and the Ganglion of the ophthalmicus profundus in Sharks. Anatomischer Anzeiger, 2, 565–574