310 George 8. Huntington and Charles F. W. McClure. 
Fig. 42. Reconstruction of a 9 mm. cat embryo (series 19), left side. lateral 
aspect. 
Fig. 48. Photomicrograph of a transverse section of a 10 mm. cat embryo 
(series 114, slide 4, section 27), taken at a level just anterior to the jugular prom- 
ontory and showing the relative position of the dorso-lateral veno-lymphatic 
and dorso-medial somatic elements with respect to each other and to the precar- 
dinal vein. 
Fig. 44. Reconstruction of an 8.5 mm. cat embryo (series 102), left side, 
lateral aspect. ; 
Fig. 45. Reconstruction of an8.5mm. cat embryo (series 102), left side, medial 
aspect. 
Fig. 46. Reconstruction of an 8.5 mm. cat embryo (series 102), right side, 
lateral aspect. 
Fig. 47. Reconstruction of a 10 mm. cat embryo (series 112), left side, lateral 
aspect. 
Fig. 48. Reconstruction of a 10 mm. cat embryo (series 113), left side, lateral 
aspect. 
Fig. 49. Reconstruction of a10inm. cat embryo (series 101), left side, lateral 
aspect. (The dotted lines represent the actual cephalic and caudal limits of the 
area reconstructed). 
Fig. 50. Reconstruction of a 10 mm. cat embryo (series 101), right side, lateral 
aspect. 
Fig. 51. Reconstruction of a 11 mm. cat embryo (series 77), left side, lateral 
aspect. 
Fig. 52. Reconstruction of a 11 mm. cat embryo (series 77), right side, lateral 
aspect. ; 
Figs. 53 and 54. Photomicrographsof transversesections of al2mm. eat embyro 
(series 78) passing through the anterior tap of evacuation on the left side and show- 
ing the absence of this tap on the right side of the embryo (sections 34 and 40, 
respectively, of slide 3). : 
Figs. 55 and 56. Photomicrographs of transverse sections of a 12 mm. cat 
embryo (series 78, slide 4, sections 33 and 35), passing through the caudal end of 
the jugular lymph sac, anterior to the jugular promontory. The multilocular 
character of the jugular sac is clearly shown in fig. 56. 
Fig. 57. Reconstruction of a 12 mm. cat embryo (series 78), lateral aspect, 
left side. 
Fig. 58. Reconstruction of a 10.7 mm. cat embryo (Harvard Embryological 
Collection, series 474), left side, lateral aspect. 
Fig. 59. Reconstruction of a 10.7 mm. cat embryo (Harvard Embryological 
Collection, series 474), right side, lateral aspect. 
Fig. 60. Reconstruction of a 14 mm. cat embryo (series 37), left side, dorsal 
aspect. : 
Fig. 61. Reconstruction of a 14 mm. cat embryo (series 37), left side, ventral 
aspect. 
Fig. 62. Reconstruction of a 16 mm. cat embryo (series 15), left side, dorso- 
lateral aspect. 
Fig. 63. Reconstruction of a 17 mm. cat embryo (series 36), left side, dorso- 
lateral aspect. 
