there was no longer 



closed system of tub- 



The venous svster 



Thus in it 



the pronepl 



branchial space of Amphioxus with the pronephric ducts, 



v regarded as having an ectod< rmal connection, the unity of 

 iric system in the Chordata would he demonstrated. At the 

 le the resemblance to the Annelid organs becomes very strik- 



convergence. 



On the same line that E. Meyer has imagined the Annel 



coelom, wonders if in the Chordata reproductive tubes may not have 

 given rise to the mesoblastic somites, parts of which are -till separated 

 off as the Malpighian capsules with the old nephrie tubules leading to 

 the exterior, though now brought into use as parts of the excretory 

 rather than reproductive passages. 



Hermaphroditism the author think- was not a primitive trait of the 

 Chordata, but where occurring, as in other groups, is to b regard© 

 a remnant or re-occurrence of the orig 



reproductive gland in all Mctazoa ; such organs as the Mullerian 

 duct in the male being transferred from the other sex ; the inverse of 

 what has taken place in the case of the mammary glands. 



In connection with this work it is of interest to note that Hans 

 Rabl 1 in a study of the adrenal bodies of birds derives the non-nervous 



l Arch. f. mik. Anat. 38, 1891, p. 28. 3 pis. 



