On the myology of the sciuromorphine and hystricomorphine rodents / by F.G. Parsons.
- Frederick Gymer Parsons
- Date:
- 1894
Licence: Public Domain Mark
Credit: On the myology of the sciuromorphine and hystricomorphine rodents / by F.G. Parsons. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![seen it at all in the true Hystricomorpha, but it is present in the Dipodidae ; it is also present in all the Seiuroinorpha except Castor. It consists of a round bundle of fibres running across between the two halves of the mandible close to the symphysis ; it is superficial to the mylo-hyoid but deep to the digastric. Its nerve-supply is from the mylo-hyoid of the inferior dental. Pig. 1. Digastric of Pleromys. Mylo-hyoid.—The mylo-hyoid in the Hystricomorpha resembles the same muscle in Man; in the Seiuroinorpha it is connected posteriorly to the tendinous arch of the digastrics. Genio-hyoid.—In the Caviidae and Dasyproctidse this muscle rises by a thin tendon from the symphysis; in the Seiuroinorpha the two muscles tend to coalesce before reaching the hyoid bone. The muscle has the usual human attachments. Qenio-hyoglossus.—This muscle has the human att achments. In Myopotamus it was noticed that the part running to the tongue was Heshy in its origin, while that going to the hyoid bone was tendinous. Styloid Muscles.—The stylo-hyoid rises from the base of the skull just internal to the paroccipital process; it passes deep to the digastric to be attached to the epihyal cartilage close to the hyoid bone. The st.vloglossus rises lower down than the last from the carti- [5]](https://iiif.wellcomecollection.org/image/b2238635x_0009.jp2/full/800%2C/0/default.jpg)
