RIBS. 71 



B. 105. A single vertebra from the tail of a Horse, exhibiting a 

 transverse section of the intervertebral substance, the 

 ligamentous fibres of which are disposed in concentric 

 circles, which recede from each other as they approach the 

 centre, and have a glairy fluid in the interspaces. 0. C. 243. 



Hunterian. 



B. 106. Atlas vertebra of a Seal (Phoca vituUnd). A stout wedge- 

 shaped ligamentous band is attached to the antero-ventral 

 surface of the vertebral body. It lies dorsal to the anterior 

 occipito-atlantal ligament with its narrow free border 

 directed forwards, and fills up the hollow between the two 

 occipital facets. The odontoid process is embraced between 

 this ligament and the transverse ligament of the atlas. 



BIBS. 



B. 107. A dorsal vertebra, and the vertebral extremity of a rib of 

 an Ostrich, showing that the latter is articulated by 

 distinct capsular ligaments to two different parts of the 

 vertebra ; viz., the parapophysis below, and the diapo- 

 physis above. The orifice for the admission of air into 

 the rib may be observed in the angle of the neck and 

 tubercle. 0. C. 253. Hunterian. 



B. 108. A portion of the sternum and the sternal extremity of the 

 rib of an Ostrich, showing that this part is also articulated 

 by distinct capsules to two points of the sternum. The 

 sternal and vertebral portions of the rib are also articulated 

 by a synovial capsule. 0. C. 254. Hunterian. 



B. 109. Some dorsal vertebrae with portions of ribs attached from 

 the Duck billed Platypus (Ornithorhynchus anatinus). A 

 transverse ligament unites the heads of the ribs, it lies on 

 the ventral surface of the intervertebral disc. 



B. 110. Bodies of the 3rd to the llth dorsal vertebrae of a Mole 

 (Talpa europcea) with the heads of the corresponding ribs. 

 A black bristle has been placed beneath the transverse liga- 

 ments ; these lie on the dorsal surface of the intervertebral 

 disc, and each is attached to the heads of a pair of ribs. 

 Sutton, Jour. Anat. & Phys., vol. xviii. 1884, p. 225. 



