PLATE 7 
EXPLANATION OF FIGURE 
34 Reconstruction of the vascular channels and other structures in the 
region of the left pronephros in an 8-mm. embryo of Bufo vulgaris (K. E. C., 
series B 49), lateral view; X 166. 
lym. jug., lymphatica jugularis; the point marked * still shows a minute 
vestigial connection with the pronephric sinus. 
temp. s. max. prim., temporal division of the primary maxillary sinus. 
lym. lat., lymphatica lateralis (both dorsal and ventra! divisions) ; the common 
channel of the jugular and the lateral lymphatic dorsal to the lymph heart is 
referred to in the text and photomicrographs as the common segment of these 
vessels. 
cor. lym. ant., cor lymphaticum anterius; the surrounding lymphatic plexus 
has temporarily severed ts connection with the heart. 
v. vert. ant., vena vertebralis anterior. 
v. jug. int., vena jugularis interna. 
v. jug. ext., vena jugularis externa. 
v. card. post., vena cardinalis posterior. 
d. Cuv., duetus Cuvieri. 
med. spin., medulla spinalis. 
gan. jug. (vag.), ganglion jugulare of the vagus group; vag. (ef. figs. 31-83). 
Other structures as before. 
128 
