STROMSTEN 



PLATE 1 



^ 



I -- &' ^t * 









B. 



A, Transverse section through Lymph Heart of Loggerhead Tur- 



tle Embryo No. 228 (32 days), showing relation of Lymph 

 Heart to Vein and Lymph Channels. (Photo-micrograph.) 



B, Photo-micrograph of transverse section taken through Anterior 



Portion of Posterior Lymph Heart of Loggerhead Turtle 

 Embryo No. 228 (32 days). 



