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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). 



