356 Prof. Owex’s Description of the Lepidosiren annectens. 
Fig. 4. Side view of the skeleton of Lepidosiren annectens. 
a. 
mw BsS Snare TBM ARS & 
. Pelvic cartilage. 
E b v o hd E D MEN 
Cartilaginous vertebral style, or * chorda dorsalis," representing 
the bodies of the vertebrae. 
. Superior lamina, or neurapophyses of the vertebræ. 
. Neurapophysial spines. 
Dermal neurapophysial spines. 
Inferior arches, or hæmapophyses of the caudal vertebre. 
Hæmapophysial spines. 
Dermal haemapophysial spines. 
Basi-occipito-sphznoidal bone. 
Ex-occipital bone. 
Parietal bone. 
Frontal bone. 
. Posterior frontal bone. 
Intermaxillary bone. 
Maxillo-pterygoidian bone. 
. Tympanic hone. 
. Articular, and r. dentary, elements of the inferior maxillary 
bone. 
. Pre-opereular bone. 
. Stylo-hyoid bone. 
. Cerato-hyoid bone. 
. Scapulo-coracoid bone. 
. Jointed cartilaginous ray of pectoral fin. 
Ribs. 
we 
- Jointed cartilaginous ray of ventral fin. 
. Intermaxillary teeth. 
. Dental plate of upper jaw. 
. Dental plate of lower jaw. 
5. Upper surface of the skull. 
* 
6. Superior or internal surface of the basi-occipito-sphenoidal bone; na- 
tural size. 
7. Inferior surface of the lower jaw; two thirds natural size. 
