4o8 EYCLESHYMER. [Vol. X. 



'90 Selenka, E. Das Stirnorgan der Wirbelthiere. Biol. Centralbl. 



Bd. X, pp. 323-326. 

 '88 Shipley, A. E. On some Points in the Development of Petromyzon 



fluviatilis. Quart. Journ. Micr. Sci. Vol. xxvii, pp. 325-370. 

 '84 Spencer, W. B. On the Presence and Structure of the Pineal Eye 



in Lacertillia. Quart. Journ. Micr. Sci. Vol. xxvi, pp. 165-238. 

 '93 Stauffacher, H. Eibildung und Furchung bei Cyclas cornea. 



Jena. Zeitschr. Bd. xxvii, pp. 196-239. 

 '88 Strahl, H. and Martin, E. Die Entwickelungsgeschichte des Parie- 



talauges bei Anguis fragillis und Lacerta vivipara. Arch. f. Anat. 



u. Physiol.., pp. 146-163. 

 '87 Swaen, a. Etudes sur le Developpement de la Torpille. Arch, de 



Biol. T. vii, pp. 537-585- 

 '91 W^ATASE, S. Studies on Cephalopods ; I. Cleavage of the Ovum. 



Journ. Morph. Vol. iv, pp. 247-302. 

 '78 Whitman, C. O. The Embryology of Clepsine. Quart. Jotirn. Micr. 



Sci. Vol. xviii, pp. 215-315. 

 '83 Whitman, C. O. A Rare Form of the Blastoderm of the Chick and 



its Bearings on the Question of the Formation of the Vertebrate 



Embryo. Quart. Journ. Micr. Sci. Vol. xxxiii, pp. 375-397. 

 '88 Whitman, C. O. Some New Facts About the Hirudinea. Journ. 



Morph. Vol. ii, pp. 585-599. 

 •91 Wilson, H.V. The Embryology of the Sea Bass. Bull. U. S. Fish. 



Comm. Vol. ix, pp. 209-277. 

 '92 ZiEGLER, F. Zur Kenntniss der Oberflachenbilder der Rana-Embry- 



onen. Anat. Anz. Bd. vii, pp. 21 1-215. 

 '9? ZiEGLER, H. E. and Ziegler, F. Beitrage zur Entwickelungsge- 

 schichte von Torpedo. Arch.f. mikr. Anat. Bd. xxxix, pp. 56-102. 



