. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 508 RUMINANTIA. of foramina for the passage of the vertebral arteries through the transverse processes of the lower six cervical vertebrae. This ana- tomical arrangement occurs in no other existing tribe of mammifers, but in an aber- rant form of fossil pachyderm (Macrau- chenid), Dr. Owen has detected the same anomaly, and has thus established an ad- ditional connecting link between the Pachy- dermata and Ruminantia. In the classification of the Cervidas given above we have included two genera not usually considered as
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 508 RUMINANTIA. of foramina for the passage of the vertebral arteries through the transverse processes of the lower six cervical vertebrae. This ana- tomical arrangement occurs in no other existing tribe of mammifers, but in an aber- rant form of fossil pachyderm (Macrau- chenid), Dr. Owen has detected the same anomaly, and has thus established an ad- ditional connecting link between the Pachy- dermata and Ruminantia. In the classification of the Cervidas given above we have included two genera not usually considered as forming a part of this family. One of the principal characters of the Cervidae proper consists in the presence of deciduous horns or antlers : the genus Moschus, however, like the Camelida3, is hornless; and the genus Camelopardalis is provided with persistent horns which are at all times clothed with a hairy integument. The dental formula of the Cervidae and all other horned ruminants is usually as fol- lows,— .00 00 33 33 Q0 i. ; c. ; p. m ; m = 32. 33' 11 33 33 The Musk-deer tribe have in addition two long and conspicuous canines in the upper jaw, projecting in the males below the mouth, (fig. 330.). The male Kijang or Muntjak (Cervus muntjac, Zimmerman) has likewise two prominent canines in the upper jaw (a, fig. 331.). In the Giraffe there is a complicated glandular and pouch-like struc- ture in the neighbourhood of the ileo-colic valve.* The Antelopidas include the greater num- ber of the Cavicornua or hollow-horned division of ruminants in which the bony axis of the horn is solid, persistent, and destitute of cavities or pores. They have, for the most part, a slender figure adapted for rapid pro- gression, and, like the Stags, are further dis- tinguished by the possession of infraor- bital glandular sinuses. Under the term OJlgosceridae (CEgosceros, Pallas) we have brought together the closely allied genera Copra and Ovis. The Goats are characterised chiefly by their
Size: 2242px × 1115px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
