Development of the Jugular Lymph Sacs. 309 
ALL OF THE RECONSTRUCTIONS MENTIONED BELOW INCLUDE THE REGION OF 
THE PRECARDINAL VEIN AND ITS CONFLUENCE WITH THE POSTCARDINAL VEIN AND 
THE DUCT OF CUVIER.”! 
Fig. 22. Reconstruction of a5 + mm. cat embryo (series 30), left side, lateral 
aspect. 
Fig. 23. Reconstruction of a5 + mm. cat embryo (series 30), right side, 
lateral aspect. 
Fig. 24. Reconstruction of a5 + mm. cat embryo (series 31), left side, lateral 
aspect. The postcardinal vein was not reconstructed in this embryo. 
Fig. 25. Reconstruction of a 5mm. cat embryo (series 134), left side, lateral 
aspect. 
Fig. 26. Reconstruction of a5mm. cat embryo (series 47), right side, lateral 
aspect. 
Fig. 27. Reconstruction of a 6.2 mm. cat embryo (series 109), left side, lateral 
aspect. 
Fig. 28. Reconstruction of 6.2 mm. cat embryo (series 109), left side, medial 
aspect. 
Fig. 29. Reconstruction of a 6.2 mm. cat embryo (series 109), right side, 
lateral aspect. 
Fig. 30. Reconstruction of 6.2 mm. embryo (series 109), right side, medial 
aspect. 
Fig. 31. Reconstruction of a 7 mm. cat embryo (series 2), right side, lateral 
aspect. 
Fig. 32. Reconstruction of a 7 mm. cat embryo (series 2), left side, lateral 
aspect. 
Fig. 33. Reconstruction of a 7 mm. cat embryo (series 138), left side, lateral 
aspect. 
Fig. 34. Reconstruction of a7 mm. embryo(series 138),left side, medial aspect. 
Fig. 35. Reconstruction of a7 mm. cat embryo (series 138), right side, lateral 
aspect. 
Fig. 36. Reconstruction of 7mm. embryo(series 138),right side, medial aspect. 
Fig. 37. Diagram (dorsal view) of fig. 35. 
Fig. 38. Reconstruction of 27.25 mm. cat embryo (series 13), right side, lateral 
aspect. 
Fig. 39. Reconstruction of a 7.25 mm. cat embryo (series 13), left side, lateral 
aspect. 
Fig. 40. Reconstruction of a 9 mm. cat embryo (series 106), left side, lateral 
aspect. 
Fig. 41. Reconstruction of a 9 mm. cat embryo (series 19), right side, lateral 
aspect. 
*1 In a few cases in which the first four spinal nerves (SP.N.J-IV) were omitted 
in the reconstructions they have been added to the drawings of the same in order 
to show the relations which they bear to the developing jugular lymph sac. In 
all other respects the drawings of the reconstructions are accurate reproductions 
of the models which they represent. 
