Haroitr: Pennaria tiarella and Tubularia crocea. 
PLATE 6. 
Tubularia crocea. 
All eggs killed in corrosive-acetic. All Figures <x 1600. 
Fie 
Fig. 
Fig. 
Fie. 
Fig. 
Fig. 
Fig. 
Fia. 
Fia. 
Fig. 
Fic. 
. 45. 
46. 
47. 
48. 
49. 
50. 
52. 
53. 
54. 
dla. 
51b. 
Egg about full grown; nucleolus of germinative vesicle fragmented 
into a chain of vacuolated pieces. Ehrlich’s hematoxylin and 
eosin. 
Similar to Figure 45, with nucleolus in several irregular fragments. 
Ehrlich’s hematoxylin and eosin. 
Extreme case of fragmentation of the nucleolus. Drawing com- 
piled from all the sections of the germinative vesicle containing 
nucleoli. Ehrlich’s hematoxylin and eosin. 
Germinative vesicle of full grown egg before polar-cell formation; 
chromatin in beaded strands; cytoplasm concentrated around 
the vesicle. Jron hematoxylin and Congo red. 
Germinative vesicle in prophase of maturation mitosis. The 
surface of the egg is raised into an elevation containing the 
ovoidal germinative vesicle with radiations at its peripheral end, 
but not directed to a visible centrosome. Cytoplasm only slightly 
concentrated around the vesicle. Iron hematoxylin and Congo 
red. 
Another germinative vesicle, to which the description of Figure 49 
also applies. ; 
First maturation spindle; chromosomes at the equator. Iron 
hematoxylin and Congo red. 
Sperm nucleus of the same egg as Figure 5la, no centrosome nor 
aster. 
The two polar cells already detached; the second still connected to 
the egg by interzonal filaments. (The polar cell shown in dotted 
outline occurs in the following section.) Egg nucleus near sur- 
face of the egg. Iron hematoxylin and Congo red. 
Somewhat oblique, nearly tangential, section. Two polar cells on 
the surface of the egg, and egg nucleus close to the surface. Iron 
hematoxylin. 
Sperm head with accompanying aster near the surface of the egg. 
Tron hematoxylin. 
