STROMSTEN 



PLATE 2 



A. 



A, Transverse section through Lymph Heart of Loggerhead 



Turtle Embryo, No. 230 (25 days). (Photo-micrograph.) 



B, Photo-micrograph of a Sagittal Section taken through Logger- 



head Turtle Embryo, No. 80 (38 days), showing position of 

 Posterior Lymph Hearts in Body of Embryo. 



