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This paper describes the origin of the dorsal intercostal arteries of 24 young male and female Zebu cattle in Costa Rica. Percentages of the various patterns are given. Their possible significance is given.  相似文献   
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Apendicular Skeleton of the Paca ( Cuniculus paca )
Six specimens (4 male and 2 female) were used to describe the apendicular skeleton of the paca. These animals were captured in various regions of Costa Rica and prepared for maceration and radiographic studies of skeletal structures. The results of this study are compared with those carried out in domestic carnivora.  相似文献   
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