260 BOTANICAL GAZETTE [APRIL 
SCHAUDINN, F., ’94, Ueber Kerntheilung mit nachfolgender K6rpertheilung bei 
Amoeba cristalligera. Sitzb. K. Preuss. Akad. Wiss. Berlin. II. 2: 1029- 
1036. figs. Io. 
, :00, Untersuchungen iiber den pt, ae bei Coccidien. Zool. 
— Anat. u. Ontog. 137: 197-293. pls. I 
ScHEWIAKOFF, W., ’88, Ueber die rrotinetishe Kerntheilung der Euglypha 
alveolata. Morpit Jahrb. 13: 193-258. 
STEVENS, F. L., :o1, aia and ae in iin Bot. Gazette 
32:77-98. ‘pls. 
STRASBURGER, E., ‘80, “Tellbildung und Zelltheilung. Jen 
——, :00, Ueber Reductionstheilung, sanilaltitddng, Centrosomen, und 
Cilienbildner i im Pflanzenreich. Jena. 
SwINcLe, D. B., :03, Formation of the spores in the sporangia of Rhizopus nigri- 
cans and of Phycomyces nitens. U.S. Dept. Agri. Bureau Plant Indus. 
Bull. 37:9-40. pls. 6. 
THAXTER, R., ’88, The Entomophthoreae of the United States. Mem. Boston 
Soc. Nat. Hist. 4:133-201. pls. 14-21. 
TOWNSEND, C. O., ’97, Der Einfluss des Zellkerns auf die Bildung der Zellhaut. 
Jahrb. Wiss. Bot. 30: 484-507. pls. 20, 21. 
VUILLEMIN, P., ’86, Etudes biologiques sur les champignons. (Entomophthora 
gloeospora Vuil.) Bull. Soc. Sci. Nancy 8: 34-46. pl. 1, figs. 1-16. 
Witsoy, E. B., ’95, Archoplasm, centrosome and chromatin in the sea-urchin 
egg. Jour. Morph. 11 
, 700, The Cell. New York. 
, 01, Experimental studies in cytology. I. A cytological study of artificial 
parthenogenesis in sea-urchin eggs. Archiv Entwicklungsmech. 12: 529-596. 
pls. 11-17. 
VAN WISSELINGH, C., ’99, Ueber das Kerngeriist. Bot. Zeit. 5'7: 155. 
WovycickxI, Z., :04, Einige neue Beitrage zur Entwicklungsgeschichte von Basidi- 
obolus ranarum Eidam. Flora ’93:87-97. pl. 4, text fig. 1. 
EXPLANATION OF PLATE XVI. 
The drawings were made with the aid of an Abbe camera lucida, together 
with the Zeiss 2™™ apochromatic obj. N. A. 1:30, combined with compensating 
ocular 12; except fig. 16, which was drawn with compensating ocular 18. 
Fics. 40-65, Empusa sciarae. All X 1500, except fig. 64, which is X2250- 
Fic. 49. Probably an early prophase of division. 
Fic. 50. A considerably advanced stage of division. 
Fic. 51. A poorly differentiated preparation in which the karyolymph has 
accumulated at one side of the dividing nucleus. 
Fic. 52. A thin section of an anaphase. 
Fic. 53. A similar preparation. 
