. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. r new. A>ionthe line from n. is seen the large two-spuiTCd nasal, the processes of which—upper and lower—are maiked , the cottilagiuoua stiucturcs of the noseaio not figured. Cranium of Fowl—Tenth Stage.—In old birds we find anintense degree of ankylosis, and yet certain sutures arepersistent to old age, or at least show some chink or markof their original scparateness. In this the Fowl agreesjvith most birds, but, being at no great height above thp 7iO B 1 11 L! IS [ANATOliy. StruthUin idee,it is
. The Encyclopaedia Britannica; ... A dictionary of arts, sciences and general literature. r new. A>ionthe line from n. is seen the large two-spuiTCd nasal, the processes of which—upper and lower—are maiked , the cottilagiuoua stiucturcs of the noseaio not figured. Cranium of Fowl—Tenth Stage.—In old birds we find anintense degree of ankylosis, and yet certain sutures arepersistent to old age, or at least show some chink or markof their original scparateness. In this the Fowl agreesjvith most birds, but, being at no great height above thp 7iO B 1 11 L! IS [ANATOliy. StruthUin idee,it is not the strongest example of what a Birdsskull may be. In a birds-eye view we see the separate-116S3 of the nasals, the nasal processes of the premaxillaries,the fore-end of the froutals, the top of the ethmoid, and thelachrymals (fig. 19, , n.,/., elli., l). Below (fig. 20), thepremajdllaries still have sutures with the palatincsand ma.\il-laries, and the latter has its jugal process, the jugal itself,ftnd the quadrato-jugal, all distinct (px., pa., mx.,j., ) tJs—j. 1c. 4-.» FiO 20. -Tlie same skull, ba^^al \iLw. Hero the Blendci-ness of the upper fnclalrods Is In strong contrast with the masslveneaa of the skuh irsclf. Tliis skullIs unusually tchiztxjnathout, the vomer (p.) being very small, and the maxiltii-palmlne processes {) much aboiled. ^Moreover, the quadrate (q.), pterygoid {pg.), the pala-tines, and of necessity the mandible—all these retain theirjoints, and traces of the union of the mandibular splintsare long retained (fig. 21, d., ar.). So also do the elementsof the hyoid arch, soon to be described, remain separate. The whole cranial box, and all the inter-orbital region,have become one bone, whilst the various fontanelles arefilled in. In the specimen which has been figured theinter-orbital fenestra () is partly open, but it is oftenobliterated. Also we see that free periosteal bony growthshave bridged over the temporal fossa, th
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Keywords: ., bookcentury1900, bookdecade1900, bookidencyclopaedi, bookyear1902
