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BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



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FiGURKS I-N. 



Six dias^-ammatic figures to show the relation, at various stages, of the MUllerlan evagi- 

 nations, epithelial bands, and nephrostonies to the divisions of the body cavity in Am- 

 blystoma. A parasagittal cut, to the right of the stomach, exposes the boJj'-wall. 

 The head is to the left. 



In Figure / the epithelial band from the first nephrostome is being deflected caudad by 

 the growth of the shelf (tab.), which is destined to divide the upper portion of the body 

 cavity into a glomerular and sub-glomerular cavity. (See opposite page.) 



