174 



STUDY OF PIG EMBRYOS. 



Next in importance comes the sagittal series, but it is desirable that every stu- 

 dent should have a series in the three standard planes at his disposal for study. 

 In the practical laboratory study each student should be required to make a series 

 of accurate camera lucida drawings of carefully selected typical sections ; then to 



28* 34-0 380 



i . 112. RECONSTRUCTION OF A PIG EMBRYO OF 12.0 MM. WITH INDICATIONS OF THE PLANES OF SEC- 

 TIONS FIGURED. 

 an, Cloacal membrane. Ao, Aorta. Au, Auricle. A. urn, Umbilical artery. a.z>, Vertebral artery, has, Basilar 



artery, c, Anlage of caecum, car, Internal carotid, cau, Caudal artery. C. Ex, External carotid artery. 



f.b, Fore-brain. G, Spinal ganglion, g, Gall-bladder. h.l>, Hind-brain. In, Intestine. Li, Liver. 



in.b, Mid-brain, op, Optic vesicle. Of, Otocyst. pan, Pancreas. Sp, Spinal cord. St, Stomach. Um, 



Umbilical opening. Ven, Ventricle of heart. ///, IV, V, Aortic arches. 



185 Transverse section, Fig. 113. 



198 

 249 

 292 

 321 

 47 

 513 

 633 



Fig. 114. 

 Fig. 1 1 6. 

 Fig. 117. 

 Fig. 1 1 8. 

 Fig. 119. 

 Fig. 1 20. 

 Fig. 121. 



284 Frontal section, Fig. 126. 

 340 " " Fig. 127. 



380 " " Fig. 128. 



572 " " Fig. 129. 



