THE SKELETON, 



325 



Fig. 130.— The left half of the skeleton of the Commoii Fowl. The skull, 

 vertebral column, and sternum are bisected in the median plane. (From 

 Marshall and Hurst.) 



A, iicctabulxun. B, cerebral fossa. CB, cerebellar fossa. CL, clavicle. CO, 

 coracoiil. CR, cervical rib. Cl, first cervical vertebra. FE, femur. HC, bypo- 

 cleidium. HU, bumenis. HY, liyoid. TF, ilio-sclatic foramen. IL, ilium. IS, 

 ischium. L, laorymal bone. MC3, metacarpal bone of third digit. MI^, mandible. 

 MS, metosteon. MT, tarso- metatarsus. IVLTl, metatarsal bone of first digit. IST, 

 nasal boue. OP, optic foramen. P, premaxilla. PB, pubes. PL, piJatine bone. 

 PT, pygostyle. E, radius. BC, radial carpal bone. S, keel of the sternum. SC, 

 scapula. T, tibio-tarsus. TH4, fourth thoracic vertebra. TJ, ulna. ITC, ulnar 

 Ciirpal bone. UP, uncinate process of rib. Z. infra-orbital bar. 



1, 2, 3, 4, the fii'st, second, third, and fourth digits. 



