— 53 — 

 Lillie, F. R. 013. 



1897. On the Origin of the Centres of the first Cleavage Spindle in 

 ünio complanata. (Amer. morph. Soc.) Scieuce, N. S. Vol. 5 No. 114 

 p. 389 — 390. [The centrosome in Archoplasm around which radiations 

 appear is the egg center. The Amphiaster of the male centrosome dis- 

 appears and never becomes functional.] 



Mead, A. D. 013. 



1897. The Origin of the Egg Centrosomes. Journ. Morphol.^ Vol. 13 

 No. 2 p. 391—394. 3 Figg. (Zool. Club Univ. Chicago.) Scicuce, N. S. 

 Vol. 5 No. 110 p. 232—235. (Amer. morph. Soc.) Ibid., No. 114 p. 389. 



\Chaetopkorus pergamentaceus. Methods. Centrosome a definite body- 

 arising from cytoplasm of oocyte and capable of growth and multiplication. 

 No ,, quadrille". Male centrosomes alone survive, are brought oyer in 

 „Middle-piece" of spermatozoon. Centrospheres arise and disappear 

 with each division.] (Abstr., Journ. R. micr. Soc. London, 1897, p. 286 

 287 



Peck, j! I. .013. 



1896. Vitality of the Spermatozoon. Science^ N. S. Vol. 4 No. 101 p. 839 



— 840. [Specimens of Mentis niercenaria, after laying 35 hours in al- 

 cohol of 9b^/(,, had spermatozoa still living.] 



Whitman, CO. 013. 



1897. The Centrosome Problem and an Experimental Test. (Zool. Club, 

 Univ. Chicago.) Science, N. S. Vol. 5 No. 110 p. 235 — 236. [In crossing 

 Turtur risoriiis and common dove, incubation period, i. e. rate of cell 

 formation, determined by female.] 



Wilson, E. B. 013. 



1897. Centrosome and Middle -piece in the Fertilization of the Egg, 

 (Amer. morph. Soc.) Science, N. S. Vol. 5 No. 114 p. 390—391. [The 

 Middle-piece of the spermatozoon is not the centrosome; the latter lies 

 inside the Middle-piece or between it and the nucleus. Difference in 

 the first cleavages in Arbacia and Toxopneiistes.^ 



Byrnes, E. F. 013.1. 



1897. The Maturation and Fertilization of the EgjiS of Limax. (Amer. 

 morph. Soc.) Science, N. S. Vol. 5 No. 114 p. 391. [Polar spindles. Centre 

 of the astrospheres after extrusion of the first and second polar bodies. 

 Entering of the sperm. Sperm nucleus and centrosome of the seg- 

 menting egg.] 



Erlanger, R. t. 013.1. 



1897. Beiträge zur Kenntnis der Structur des Protoplasmas, der karyo- 

 kinetischen Spindel und des Centrosoms. 1. Ueber die Befruchtung und 

 erste Teilung des Ascariseies. Arch, niikr. Anat., Bd. 49 Heft 2 p. 309 — 440. 

 3 Taf. , 4 Textfigg. [Reifung. Richtungsspindeln haben Centrosomen. 

 Befruchtung, das Centrosom wird von Spermatozoen eingeführt, während 

 das Centrosom des inneren Poles der 2. Richtungsspindel zurückgebildet 

 wird. Das Cyto- und Karyoplasma (Linin) sind wabig-schaumig gebaut. 

 Die ,, Sphären" sind vergängliche Gebilde und entstehen durch Umord- 

 nung der Cytoplasmaalveolen unter dem Zug der Centrosomen. Die eigent- 

 liche Spindel entsteht zum Teil aus Cyto-, zum Teil aus Karyoplasma, 

 die Spindelfasern entsprechen Kraftlinien, die Centrosomen den Polen des 

 Kraftliniensystems. Die Centrosomen sind besondere dauernde Zellorgane.] 



