. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. QUADRUMANA. 217 nectecl with those upon the Ccbince, in which I said that the form of the bony framework passes gradually and in a descending line into the form oftheLemurirus, and by those into the form of the smaller Carnivora and Insectivora. The truth of this assertion will be proved by the examination of the skull. In all the skulls of the above-mentioned genera of LcmurincE, the orbits are open posteriorly, and most so in the Galeopithecus (jig. 137), which we shall take as type, and in which there is a large dista
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. QUADRUMANA. 217 nectecl with those upon the Ccbince, in which I said that the form of the bony framework passes gradually and in a descending line into the form oftheLemurirus, and by those into the form of the smaller Carnivora and Insectivora. The truth of this assertion will be proved by the examination of the skull. In all the skulls of the above-mentioned genera of LcmurincE, the orbits are open posteriorly, and most so in the Galeopithecus (jig. 137), which we shall take as type, and in which there is a large distance between the orbital process of the frontal and of the zygomatic bone united to- gether in Tarsius, lAchanotus, Stenojjs, Otoiic- nus, and Lemur, and forming there a boun- dary for the open orbit. In all the Lemurin<s there is a double frontal bone, with two nasal bones, which are universally very long, and protracted to the anterior part of the muzzle, principally in Stenops, in which they form a sort of tube with the intermaxillar bone. The facial suture of the intermaxillar bone is in general distinct. The lacrymal canal is situ- ated not in the orbit, but on the facial surface of the superior maxillary bone ; in Cheirogaleus (Jig. 138) and Lemur, there is a regular oval Fig. Skull af the Clieirogaleus Commersonii. ( Original, Mas. Ley den.) opening, in the zygomatic bone, similar to that, which I described in Lagothrix, Mycetes, and Ateles. In the glenoid cavity of the tem- poral bone there is a vertical ridge to prevent the backward dislocation of the lower jaw. The coronoid process of the lower jaw is very distinct, as in all the animals, in which the orbits are open posteriorly, and the chin is more depressed than in the Monkeys and Cebincs. In the vertebral column the cervical vertcbrte are seven in number. The anterior vertical ridges of the transverse processes, in the pos- terior cervical vertebrae, are more developed than in the Cebince, and extended ov
Size: 1927px × 1297px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
