G. J. de Fejervary: Dermal Bones of thc Sknll 



09 



Phylogenetical and morphological 

 Notes on the primary and secondary 

 Dermal Bones of the Skull. 



By Baron Q. J. de Fejervary, Ph. D. 



Assistant-Curator in Charge of the Herpetological Collections 

 in the Hungarian National Museum at Budapest. 

 (With 6 Figs. in the Text.) 



Explanation of the figures. 



Pi^. 1 (p. 74). Upper view of skull of Pelobates fuscus Laur., showing the 

 secondary dermal ossif ications ; prootical region not overroofed. — ad. ^ from 

 Esztergom (Hiingary), 30. III. 1920. Leg. Mr. L. Veghelyi. (Mus. Hung. Amph. 

 No. 2570/1.) — 2 X nat. size. — Ad nat. del. Baroness A. M. de Fejerväry- 

 Längh, Ph. D. 



Fig. 2 (p. 74). Upper view of skull of Pelobates cultripes Cuv., showing the 

 secondary dermal ossifxations ; an osseous bridge above the prootical region, from 

 the frontoparietals to the tympanic, enclosing the fenestra posttemporalis. — ad. 

 $ from Lisbon, 1912. Leg. Dr. J. de ßethencourt-Ferreira. (Roy. Hung. 

 Geological Inst.) — 2 x nat. size. — Ad nat. del. Baroness A. M. de Fe j ervär y- 

 Längh, Ph. D. 



Fig. 3 (p. 75). Upper view of median and hind part of skull of a nearly 

 metamorphosed larva of Pelobates syriacus B 1 1 g r. ; no trace of secondary exoskeletal 

 Clements. — Asia minor, 1911. Leg. Mr. L. de Naday. (Mus. Himg. Amph. 

 No. 2511). — Strongly magnified. — Ad nat. del. Baroness A. M. de Fej6r- 

 väry-Längh, Ph. D. 



Fig. 4 (p. 78). Nasal bone of Ophisaurus apus Pall. and the secondary 

 dermal bone-plate attached to its dorsal surface. — old from Zelenika (Dal- 

 matia). (Roy. Hung. Geol. Inst.) — Strongly magnified. — Ad nat. del. Baroness 

 A. M. de Fejervary-Längh, Ph. D. 



a: dorsal view, with the secondary dermal bone-plate (corresponding to the prae- 



frontal s h i e 1 d) adhering to it. 

 b: ventral view of the same. 



c: dorsal view, after the removal of the secondary dermal bone; that part of the 

 secondary dermal ossif ication which corresponds to one half of the frontonasal 

 shield rests upon the nasal bone under the form of a crusta calcarea. 

 d: dorsal view of the isolated secondary dermal bone-plate which corresponds to 

 the praefrontal shield. 

 Fig. 5 (p. 78). Supraciliary lamina and a part of the crusta calcarea (*), de- 

 tached from the roof of the skull, of Tiliqua scincoides White. — ad. $, Australia, 

 1908. (Mus. Himg. Rept. No. 2290/15.) — Strongly magnified. — Ad nat. del. 

 Baroness A. M. de Fej ervär y-Längh, Ph. D. 



Fig. 6 a (p. 88). Upper view of skull of a fontanelliferous Lacerta. {La- 

 certa muralis Laur. var. Bocagei Seoane, ad. ^ from Alcochete [Portugal], 

 1912. — Leg. Dr. J. de B. -Ferreira. — Coli. Fe j ervär y - Längh.) — 

 About 6-06 X nat. size. — Ad nat. del. Dr. C. Szombathy. 



Fig. 6b (p. 83). Fujly ossif ied supraciliary lamina of an old of the same 

 variety. (From La Coruna» [Spain]. — Leg. Don V. L. Seoane. — (Mus. Hung.) 

 — 9-35 X nat. size. — Ad nat. del. Baron G. J. de Fejörväry. (Only the II. 

 & III. supraocularies are cleanly prepared, whilst the surrounding parts, covered 

 with scales, are marked with dots.) — Both Figs. from G. J. de Fejerväry, 

 Ann. Mus. Nat. Hung., XIII, Budapest, 1915, PI. II, Figs. 1 & 6. 



Within the Vertebrate Skeleton anatomists distinguish two 

 main kinds o f bones : the , , membrane* ' bones ordermal bones, called 

 Deckknochen", ,,Hautknochen" or Belegknochen" by the 



7. Heft 



