THE ELASMOBRANCII FISHES 41 



1908. Kynberk, G. van, Di una disposizioue particolarc nello scheletro cutaneo di alcuni 

 Selacei. Eend. Accad. Lincei Roma, Ser. 5, Vol. 17, pp. 137-146, 12 text figs. 



1906. Spex'GEL, J. W., In Bezichung aiif Mund- und Schlundziiline dor Elasmobranchier. 

 Zool. Anz., Bd. 29, pp. 332-333. 



1861. Steenstrup, M., Sur la difference entre les poissons osseux et les poissons cartilagi- 



neux au point de A-ue de la formation des ecailles. Ann. Sci. Nat. Zool., Ser. 4, T. 15, 



p. 368. 

 1903. Steikhard, Otto, tJber Placoidschuppen in der Mund- und Rachen-Hohle der Plagios- 



tomeu. Arch, f . Natur., Jahr 69, Bd. 1, pp. 1-46. Also : Inaug. Diss. Bern, 1902, pp. 



1-50, Taf . 1-2. 



1906. StudniJka, F. K., Ueber kollagene Bindegewebsfibrillen in der Grundsubstanz des 

 Hyalinknorpels, im Dentin und im Knocliengewebe. Anat. Anz., Bd. 29, pp. 334-344, 



10 text figs. 



1909. Studnic'KA, F. K., Zur Losung der Dentiufrage. Anat. Anz., Bd. 34, pp. 481-502, 2 

 text figs. 



1876. Tomes, G. S., On the Development of the Teeth of Fishes. (Elasmobranehii and 

 Teleostei.) Phil. Trans. Roy. Soc. Lond., Vol. 166 (1), pp. 257-267, pi. 31. 



1898. ToiXES, C. S., Upon the Structure and Development of the Enamel of Elasmobranch 

 Fishes. Phil. Trans. Roy. Soc. Lond., Vol. 190B, pp. 443-464, pis. 17-18. 



1898. Tomes, C. S., Upon Rose's Proposed Classification of the Forms of Dentine. Anat. 

 Anz., Bd. 14, pp. 343-348. 



1896. Treuexfels, Paul, Die Zahne von Myliobatis aquila. Inaug. Diss., Univ. Basel, pp. 

 1-34, pis. 1-2. 



1849. Williamson, W. C., On the Microscopic Structure of the Scales and Dermal Teeth of 

 Some Ganoid and Placoid Fish. Phil. Trans. Roy. Soc. Lond., ] 849, Pt. 1, pp. 435- 

 475, pis. 40-43. 



1851. Williamson, W. 0., Investigations into the Structure and Development of the Scales 

 and Bones of Fishes. Phil. Trans. Roy. Soc. Lond., 1851, Pt. II, pp. 643-702, pis. 

 28-31. 



1892. Woodward, A. S., The Evolution of Sharks' Teeth. Nat. Sci., Vol. 1, pp. 671-675, 12 

 text figs. 



1893. Woodward, A. S., On the Dentition of a Gigantic Extinct Species of Myliobatis from 

 the Lower Tertiary Formation of Egypt. Proc. Geol. Soc. Lond., pp. 558-559, pi. 48. 



