88 THE ELASMOBRANCH FISHES 



1896. White, Ph. J., The Existence of the Skeletal Elements between the Mandibular and 

 Hyoid Arches in Hexauchus and Laemargus. Anat. Anz., Bd. 11, pp. 57-60, 3 text figs. 



1892. WiEDERSHEiM, R., Das Gliedmassenskelet der Wirbelthiere. Jena, pp. 1-266, pis. 1-17, 

 40 text figs. 



1904. WiJHE, J. W. VAN, Ueber die Entwicklung des Kopf skelets bei Selachiern. C. R. 6me 

 Congr. internat. zool., Berne, 1904, pp. 319-322. 



1922. WiJHE, J. W. VAN, Friihe Entwicklungsstudien des Kopf- und Rumpfskelets von 

 Acanthias vulgaris. Dijd Dierk., Afl. 22, pp. 271-298, pi. 11, 4 text figs. 



1886. WoODAVARD, A. S., On the Relations of the Mandibular and Hyoid Arches in a Creta- 

 ceous Shark (Hybodus dubrisiensis, Mackie). Proc. Zool. Soc. Lond., pp. 218-224, 

 pi. 20. 



