30 



OSTEOLOGY 



present, as in the pig and dog. They are best designated numerically as first tarsal, 

 second tarsal, etc. The central tarsal is interposed between the rows. 



The preceding terms are anglicized abbreviations of those introduced by Gegenbaur into 

 comparative anatomy. The Latin names and synonyms are given in the following table. 



Tibial (Os tarsi tibiale, Tt.) Astragalus or Talus 



Fibular (Os tarsi fibularc, Tf.) Calcaneus or Os calcis 



Central (Os tarsi contralo, Tc.) Scaplioid or Navicular 



First Tarsal (Os tarsale primiun, Tl) First or internal cuneiform 



Second Tarsal (Os tarsale secundum, T2) Second or middle cuneiform 



Third Tarsal (Os tarsale tertium, T3) Third or external cuneiform 



Fourth Tarsal (Os tarsale quartum, T4) Cuboid. 



The metatarsal and digital bones resemble in general those of the corresponding 

 regions of the thoracic limb; the differential features will be noted in the special 

 descriptions. 



Fig. .5. — Skeleton of Horse, with Outline of Contour of Body. 

 I.H., Atlas; 7.U., seventh cervical vertebra; I.E., first thoracic vertebra; 17. R., seventeenth thoracic 

 vertebra; I.L., first lumbar vertebra; 6.L., sixth lumbar vertebra; K, sacrum; I.S., first coccygeal vertebra; 

 76.6'., si.xleenth coccygeal vertebra; fi./f., sixth rib; 6.A'., costal cartilage; ;S./J., last rib; 1, .scapula; 1', cartilage 

 of scapula; 2, .spine of .scapula; 4, humerus; 4' external epicondyle of humerus; 5, external tuberosity of humerus; 

 <(, deltoid tuberosity; 7, .shaft of ulna; 8, olecranon; 9, radius; 10, carpus; 11, accessory carpal bone; 12, meta- 

 carpus; l.'i, digit; 14, .sternum; 14", xiphoid cartilage; 1,5, ilium; 1(5, 16', external and internal angles of ilium; 

 17, i.schium; 18, femur (.shaft); 19, trochanter major; 27, trochanter minor; 28, trochanter tertius; 20, patella; 

 21, lil)i.i (shaft); 21', external condyle of tibia; 23, fibula; 22, tarsus; 24, tuber calcis; 25, metatarsus; 26. digit. 

 (.\ftcr Ellenberger-Baum, Anat. fiir Kiiustler.) 



