814 FOOT. 
EXPLANATION OF PLATE XXXIX. 
Zeiss hom. immer. 2mm. 140 ap. Abbe Camera. 
Frcs. 1-7. Orange, methyl green. See Method, p. 811. 
Fics. 8-10. Iron haematoxylin followed by erythrosin. 
Fics. 1, 2, 3, 4, 8, X about 687. 
FIGs. 5, 6, 7, 9, 10, X about 500. 
Fic. 1. Spermatozo6n. (Middlepiece yellow.) 
Fic. 2. Longitudinal section through fertilization cone. (Only such micro. 
somes represented as appear to be independent of the cytoplasmic threads.) 
Fic. 3. Sperm rod and sperm attraction sphere. (Microsomes and centrosome 
green.) 
Fic. 4. Longitudinal section through second maturation spindle. 
Fic. 5. Section of egg. (Telophase of the second maturation spindle. Vesicles 
forming female pronucleus. Egg attraction sphere has nearly disappeared. Micro. 
somes not represented.) 
Fic. 6. Vesicles forming male pronucleus. (Male attraction sphere has dis. 
appeared. Microsomes not represented.) 
Fic. 7. Pronuclei in contact. (Attraction spheres present.) 
Fic. 8. Spermatozobn. (Middlepiece red.) 
Fic. 9. Male attraction sphere. (Microsomes and centrosome black.) 
Fic. 10. Egg attraction sphere. (Microsomes and centrosome black.) 
