EIGENMANN 



PLATE 28 



* - ' -- y,--^. Si~-~' : * 



\ ' ~,>V?.&~ N 



>.'*'* .t-.rt!.*$*&v 





y : ;.^ 



:.L,.&2* 



. f 



: 



'."M&* '-Mi 

 .llf. Of 



'. '.^f " ' '^K? j 



; %^fe^^,- 



*' "SSH^^-V; /."' 



F jr.c 



A. "Nest" of small ova (s. c.), each about 1 M in diameter, one larger ovum (/.o.) 



50 A 1 in diameter. Whole nest contained within special arrangement of stromal 

 cells (si. c.). X about 300 diameters. 



B. Developing ovum (m. o.), surrounded by rapidly atrophying small ova (a.o.); 



/., lumen of ovisac; n., " germinative spot"; si., stroma. Diameter of large ovum, 

 120/t. X 500 diameters. 



C. Cross-section of one horn of ovary. /., lumen of ovisac; o., ova; oV. s., ovisac; 



st., stroma. Guide line to si. crosses place of attachment of stroma to median wall 

 of hom of ovisac. X about 50 diameters. 



D. "Nest of yellow cells." Diameter of individual "yellow cells" (y. c.) about 15 pst. c., 



arrangement of stromal cells around yellow cells, as around "nest" of small ova 

 (si. c., in fig. A.) X 200 diameters. 



E. Few "yellow cells" more highly magnified to show pigment-granules and general 



appearance of slow degeneration. Nuclei can not be distinguished in photo- 

 graph, though distinct enough in section. X about 800 diameters. 



F. 3 adjacent " nests " of ova (n.), each with developing ovum ; si. c , stromal cells which 



separate " nests " and likewise developing ova from one another. X 2 1 diameters. 



