104. OTTO F. KAMPMEIER 
a similar way. In a young toad (Bufo lentiginosus), shortly 
after the period of metamorphosis, the author observed five such 
points of entry in the anterior lymph heart, but doubtlessly their 
ioe 
ots 
Rion 
Ge 
eS 
ia) 
: LN 
2 cor lym. ant. sin. 
ak tee 
Fig. 23 Photomicrograph of a transverse section through the left anterior 
lymph heart region in a 16-mm. embryo of Bufo vulgaris (KX. E. C., series B 39, 
slide 5, section 51). X 340. *, valve at the afferent portal. Other references 
as before. 
number is increased with the growth of the toad towards maturity, 
for Radwanska (’06) counted more than a dozen on the same 
organs in adult frogs. 
c. The efferent portal, or ostiwm venosum. ‘The formation of 
the valve at the lymphaticovenous junction is perhaps not so 
