*Communicated by Dr. T. A. Stephenson, F.Z.S.
The Cranial Morphology of Crinia georgiana Tschudi (Cystignathidæ, Amphibia).
Article first published online: 21 AUG 2009
Proceedings of the Zoological Society of London
Volume 104, Issue 1, pages 119–142, April 1934
How to Cite
Toit, C. A. D. (1934), The Cranial Morphology of Crinia georgiana Tschudi (Cystignathidæ, Amphibia). Proceedings of the Zoological Society of London, 104: 119–142. doi: 10.1111/j.1469-7998.1934.tb06226.x
- Issue published online: 30 OCT 2009
- Article first published online: 21 AUG 2009
- [Received August 29, 1933: Read March 20, 1934.]
- 1The alary forms the lateral support of the entire lateral wall of the apertura externa and vestibulum.
- 2The crista subnasalis is absent.
- 3The anterior undivided part of the crista intermedia is much bigger than in Rana.
- 4The posterior vestibular “Wulst” is absent.
- 5The plica obliqua is suspended from the tectum nasi.
- 6The infundibulum possesses an extra antero-ventral extension.
- 7A well-developed recessus sacciformis is present.
- 8The cavum medium, being more posteriorly situated than in the European Rana, does not share in the formation of the recessus sacciformis.
- 9The ductus nasolacrimal opens into the roof of the horizontal part of the infundibulum.
- 10The recessus lateralis attains an enormous size.
- 11The plica isthmi is absent.
- 12The intermaxillary gland opens into tho buccal cavity by two main ducts only.
- 13The septomaxillary consists of an anterior unpaired portion which has two posteriorly-directed processes.
- 14The connective-tissue between the latter bone and the lamina inferior tends to disappear.
- 15The vomer (prevomer) is divided, consisting of an anterior edentulous and a posterior dentigerous portion.
- 16The os en ceinture is paired.
- 17The foramen for the IVth nerve is situated in front of the foramen opticum.
- 18The arteria carotis cerebralis enters the skull through a separate foramen.
- 19The foramen perilymphaticum superius does not communicate with the jugular foramen.
- 20The fronto-parietal fontanelle is large.
- 21There is only one dorsal fenestra in the chondocranium.
- 22The annulus tympanicus is sickle-shaped.
- 23The hyomandibular branch of the trigeminal nerve is ventrally situated to the plectrum.
- 24The posterior part of the operculum is weakly perichondrally ossified.
- 25The articular region differs from that of Rana.
- 26Crinia possesses a bursa angularis oris.
- 27The hyale is confluent with the otic capsule.