Rod and the Gun Author:James Wilson Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: SECTION IV. The Osteology of Fishes. The most important characters of the sides of the head are derived from the pre-opercle, and the adjacent parts which ... more »form the gill-covers,—that is the opercle, the sub-opercle, and the inter-opercle. The head of fishes usually consists of about sixty bones—the amount being sensibly greater in such species as have the upper maxillary subject to divj- CRANIUM OF I'EUCH. sion. The accompanying cut of the cranium of the perch, with the subjoined enumeration of the parts, will suffice to illustrate the subject with greater satisfaction to the reader than is likely to result from a more lengthened verbal disquisition. In regard to the texture of the bones of fishes, their skeletons are either bony, fibro-cartilaginow, or truly cartilaginous. These distinctive appellations must be borne in mind by whoever studies —in books—the natural history of fishes, as the great primary divisions of the subject are based upon the characters which the above terms indicate. The species distinguished by the last named character are the chondropterygiau group, such as sturgeons, sharks, and rays, all of which exhibitparticular portions of it are cartilaginous. Such are the bones which form the head of the pike. Enumeration of the principal bones of the head, with reference to the figures in the preceding cut. Cranium. Palatal arch, temporal bones, S.c. 1. Principal Frontal.22. Palatal.2. Anterior Frontal.23. Temporal.3. Ethmoidal.24. Transverse.4. Posterior Frontal.25. Internal pterogoid.5. (Basilary.)26. Jugal.6. Sphenoid.27. Tympana! .7. Parietal.8. Inter parietal. 9. Inter occipital.Opercular bones. 10. Occipital lateral.28. Opercle.11. Great ala, or temporal ala. 12. Mastoidean.29. (Styloid.) 30. Pre-opercle.13. (Rupes.) 1 4. Orbitary ala...« less
ISBN-13: 9780854099337 ISBN-10: 0854099336 Pages:460 Edition:Facsimile of 1844 ed Rating: