372 MOORE. 



36. Whitman, C. O. The Embryology of Clepsine. Quar. Jour. Mic. 



Sci., xviii (1878), pp. 215-315. Pis. XII-XV. 



37. Williams, T, Researches on the Structure and Homology of the 



Reproductive Organs of the Annelids. Philos. Trans.., 1858, pp. 

 93-114. Pis. VI-VIII. 



38. Wilson, E. B. The Embryology of the Earthworm. Journ. of 



Morph., iii (1889), pp. 387-462. Pis. XVI-XXII. 



